18355f576SJeff Roberson /* 28355f576SJeff Roberson * Copyright (c) 2002, Jeffrey Roberson <jroberson@chesapeake.net> 38355f576SJeff Roberson * All rights reserved. 48355f576SJeff Roberson * 58355f576SJeff Roberson * Redistribution and use in source and binary forms, with or without 68355f576SJeff Roberson * modification, are permitted provided that the following conditions 78355f576SJeff Roberson * are met: 88355f576SJeff Roberson * 1. Redistributions of source code must retain the above copyright 98355f576SJeff Roberson * notice unmodified, this list of conditions, and the following 108355f576SJeff Roberson * disclaimer. 118355f576SJeff Roberson * 2. Redistributions in binary form must reproduce the above copyright 128355f576SJeff Roberson * notice, this list of conditions and the following disclaimer in the 138355f576SJeff Roberson * documentation and/or other materials provided with the distribution. 148355f576SJeff Roberson * 158355f576SJeff Roberson * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 168355f576SJeff Roberson * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 178355f576SJeff Roberson * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 188355f576SJeff Roberson * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 198355f576SJeff Roberson * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 208355f576SJeff Roberson * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 218355f576SJeff Roberson * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 228355f576SJeff Roberson * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 238355f576SJeff Roberson * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 248355f576SJeff Roberson * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 258355f576SJeff Roberson * 268355f576SJeff Roberson * $FreeBSD$ 278355f576SJeff Roberson * 288355f576SJeff Roberson */ 298355f576SJeff Roberson 308355f576SJeff Roberson /* 318355f576SJeff Roberson * uma_core.c Implementation of the Universal Memory allocator 328355f576SJeff Roberson * 338355f576SJeff Roberson * This allocator is intended to replace the multitude of similar object caches 348355f576SJeff Roberson * in the standard FreeBSD kernel. The intent is to be flexible as well as 358355f576SJeff Roberson * effecient. A primary design goal is to return unused memory to the rest of 368355f576SJeff Roberson * the system. This will make the system as a whole more flexible due to the 378355f576SJeff Roberson * ability to move memory to subsystems which most need it instead of leaving 388355f576SJeff Roberson * pools of reserved memory unused. 398355f576SJeff Roberson * 408355f576SJeff Roberson * The basic ideas stem from similar slab/zone based allocators whose algorithms 418355f576SJeff Roberson * are well known. 428355f576SJeff Roberson * 438355f576SJeff Roberson */ 448355f576SJeff Roberson 458355f576SJeff Roberson /* 468355f576SJeff Roberson * TODO: 478355f576SJeff Roberson * - Improve memory usage for large allocations 488355f576SJeff Roberson * - Investigate cache size adjustments 498355f576SJeff Roberson */ 508355f576SJeff Roberson 518355f576SJeff Roberson /* I should really use ktr.. */ 528355f576SJeff Roberson /* 538355f576SJeff Roberson #define UMA_DEBUG 1 548355f576SJeff Roberson #define UMA_DEBUG_ALLOC 1 558355f576SJeff Roberson #define UMA_DEBUG_ALLOC_1 1 568355f576SJeff Roberson */ 578355f576SJeff Roberson 588355f576SJeff Roberson 598355f576SJeff Roberson #include "opt_param.h" 608355f576SJeff Roberson #include <sys/param.h> 618355f576SJeff Roberson #include <sys/systm.h> 628355f576SJeff Roberson #include <sys/kernel.h> 638355f576SJeff Roberson #include <sys/types.h> 648355f576SJeff Roberson #include <sys/queue.h> 658355f576SJeff Roberson #include <sys/malloc.h> 668355f576SJeff Roberson #include <sys/lock.h> 678355f576SJeff Roberson #include <sys/sysctl.h> 688355f576SJeff Roberson #include <sys/mutex.h> 694c1cc01cSJohn Baldwin #include <sys/proc.h> 708355f576SJeff Roberson #include <sys/smp.h> 7186bbae32SJeff Roberson #include <sys/vmmeter.h> 7286bbae32SJeff Roberson 7386bbae32SJeff Roberson #include <machine/types.h> 748355f576SJeff Roberson 758355f576SJeff Roberson #include <vm/vm.h> 768355f576SJeff Roberson #include <vm/vm_object.h> 778355f576SJeff Roberson #include <vm/vm_page.h> 788355f576SJeff Roberson #include <vm/vm_param.h> 798355f576SJeff Roberson #include <vm/vm_map.h> 808355f576SJeff Roberson #include <vm/vm_kern.h> 818355f576SJeff Roberson #include <vm/vm_extern.h> 828355f576SJeff Roberson #include <vm/uma.h> 838355f576SJeff Roberson #include <vm/uma_int.h> 84639c9550SJeff Roberson #include <vm/uma_dbg.h> 858355f576SJeff Roberson 868355f576SJeff Roberson /* 878355f576SJeff Roberson * This is the zone from which all zones are spawned. The idea is that even 888355f576SJeff Roberson * the zone heads are allocated from the allocator, so we use the bss section 898355f576SJeff Roberson * to bootstrap us. 908355f576SJeff Roberson */ 9186bbae32SJeff Roberson static struct uma_zone masterzone; 9286bbae32SJeff Roberson static uma_zone_t zones = &masterzone; 938355f576SJeff Roberson 948355f576SJeff Roberson /* This is the zone from which all of uma_slab_t's are allocated. */ 958355f576SJeff Roberson static uma_zone_t slabzone; 968355f576SJeff Roberson 978355f576SJeff Roberson /* 988355f576SJeff Roberson * The initial hash tables come out of this zone so they can be allocated 998355f576SJeff Roberson * prior to malloc coming up. 1008355f576SJeff Roberson */ 1018355f576SJeff Roberson static uma_zone_t hashzone; 1028355f576SJeff Roberson 1038355f576SJeff Roberson /* 1048355f576SJeff Roberson * Zone that buckets come from. 1058355f576SJeff Roberson */ 1068355f576SJeff Roberson static uma_zone_t bucketzone; 1078355f576SJeff Roberson 10886bbae32SJeff Roberson /* 10986bbae32SJeff Roberson * Are we allowed to allocate buckets? 11086bbae32SJeff Roberson */ 11186bbae32SJeff Roberson static int bucketdisable = 1; 11286bbae32SJeff Roberson 1138355f576SJeff Roberson /* Linked list of all zones in the system */ 1148355f576SJeff Roberson static LIST_HEAD(,uma_zone) uma_zones = LIST_HEAD_INITIALIZER(&uma_zones); 1158355f576SJeff Roberson 1168355f576SJeff Roberson /* This mutex protects the zone list */ 1178355f576SJeff Roberson static struct mtx uma_mtx; 1188355f576SJeff Roberson 1198355f576SJeff Roberson /* Linked list of boot time pages */ 1208355f576SJeff Roberson static LIST_HEAD(,uma_slab) uma_boot_pages = 1218355f576SJeff Roberson LIST_HEAD_INITIALIZER(&uma_boot_pages); 1228355f576SJeff Roberson 1238355f576SJeff Roberson /* Count of free boottime pages */ 1248355f576SJeff Roberson static int uma_boot_free = 0; 1258355f576SJeff Roberson 1268355f576SJeff Roberson /* Is the VM done starting up? */ 1278355f576SJeff Roberson static int booted = 0; 1288355f576SJeff Roberson 1298355f576SJeff Roberson /* This is the handle used to schedule our working set calculator */ 1308355f576SJeff Roberson static struct callout uma_callout; 1318355f576SJeff Roberson 1328355f576SJeff Roberson /* This is mp_maxid + 1, for use while looping over each cpu */ 1338355f576SJeff Roberson static int maxcpu; 1348355f576SJeff Roberson 1358355f576SJeff Roberson /* 1368355f576SJeff Roberson * This structure is passed as the zone ctor arg so that I don't have to create 1378355f576SJeff Roberson * a special allocation function just for zones. 1388355f576SJeff Roberson */ 1398355f576SJeff Roberson struct uma_zctor_args { 1408355f576SJeff Roberson char *name; 141c3bdc05fSAndrew R. Reiter size_t size; 1428355f576SJeff Roberson uma_ctor ctor; 1438355f576SJeff Roberson uma_dtor dtor; 1448355f576SJeff Roberson uma_init uminit; 1458355f576SJeff Roberson uma_fini fini; 1468355f576SJeff Roberson int align; 1478355f576SJeff Roberson u_int16_t flags; 1488355f576SJeff Roberson }; 1498355f576SJeff Roberson 1508355f576SJeff Roberson /* 1518355f576SJeff Roberson * This is the malloc hash table which is used to find the zone that a 1528355f576SJeff Roberson * malloc allocation came from. It is not currently resizeable. The 1538355f576SJeff Roberson * memory for the actual hash bucket is allocated in kmeminit. 1548355f576SJeff Roberson */ 1558355f576SJeff Roberson struct uma_hash mhash; 1568355f576SJeff Roberson struct uma_hash *mallochash = &mhash; 1578355f576SJeff Roberson 1588355f576SJeff Roberson /* Prototypes.. */ 1598355f576SJeff Roberson 1608355f576SJeff Roberson static void *obj_alloc(uma_zone_t, int, u_int8_t *, int); 1618355f576SJeff Roberson static void *page_alloc(uma_zone_t, int, u_int8_t *, int); 1628355f576SJeff Roberson static void page_free(void *, int, u_int8_t); 1638355f576SJeff Roberson static uma_slab_t slab_zalloc(uma_zone_t, int); 1648355f576SJeff Roberson static void cache_drain(uma_zone_t); 1658355f576SJeff Roberson static void bucket_drain(uma_zone_t, uma_bucket_t); 1668355f576SJeff Roberson static void zone_drain(uma_zone_t); 1678355f576SJeff Roberson static void zone_ctor(void *, int, void *); 1689c2cd7e5SJeff Roberson static void zone_dtor(void *, int, void *); 1698355f576SJeff Roberson static void zero_init(void *, int); 1708355f576SJeff Roberson static void zone_small_init(uma_zone_t zone); 1718355f576SJeff Roberson static void zone_large_init(uma_zone_t zone); 1728355f576SJeff Roberson static void zone_foreach(void (*zfunc)(uma_zone_t)); 1738355f576SJeff Roberson static void zone_timeout(uma_zone_t zone); 1740aef6126SJeff Roberson static int hash_alloc(struct uma_hash *); 1750aef6126SJeff Roberson static int hash_expand(struct uma_hash *, struct uma_hash *); 1760aef6126SJeff Roberson static void hash_free(struct uma_hash *hash); 1778355f576SJeff Roberson static void uma_timeout(void *); 1788355f576SJeff Roberson static void uma_startup3(void); 179a553d4b8SJeff Roberson static void *uma_zalloc_internal(uma_zone_t, void *, int, uma_bucket_t); 18086bbae32SJeff Roberson static void uma_zfree_internal(uma_zone_t, void *, void *, int); 18186bbae32SJeff Roberson static void bucket_enable(void); 1828355f576SJeff Roberson void uma_print_zone(uma_zone_t); 1838355f576SJeff Roberson void uma_print_stats(void); 1848355f576SJeff Roberson static int sysctl_vm_zone(SYSCTL_HANDLER_ARGS); 1858355f576SJeff Roberson 1868355f576SJeff Roberson SYSCTL_OID(_vm, OID_AUTO, zone, CTLTYPE_STRING|CTLFLAG_RD, 1878355f576SJeff Roberson NULL, 0, sysctl_vm_zone, "A", "Zone Info"); 1888355f576SJeff Roberson SYSINIT(uma_startup3, SI_SUB_VM_CONF, SI_ORDER_SECOND, uma_startup3, NULL); 1898355f576SJeff Roberson 19086bbae32SJeff Roberson /* 19186bbae32SJeff Roberson * This routine checks to see whether or not it's safe to enable buckets. 19286bbae32SJeff Roberson */ 19386bbae32SJeff Roberson 19486bbae32SJeff Roberson static void 19586bbae32SJeff Roberson bucket_enable(void) 19686bbae32SJeff Roberson { 19786bbae32SJeff Roberson if (cnt.v_free_count < cnt.v_free_min) 19886bbae32SJeff Roberson bucketdisable = 1; 19986bbae32SJeff Roberson else 20086bbae32SJeff Roberson bucketdisable = 0; 20186bbae32SJeff Roberson } 20286bbae32SJeff Roberson 2038355f576SJeff Roberson 2048355f576SJeff Roberson /* 2058355f576SJeff Roberson * Routine called by timeout which is used to fire off some time interval 2068355f576SJeff Roberson * based calculations. (working set, stats, etc.) 2078355f576SJeff Roberson * 2088355f576SJeff Roberson * Arguments: 2098355f576SJeff Roberson * arg Unused 2108355f576SJeff Roberson * 2118355f576SJeff Roberson * Returns: 2128355f576SJeff Roberson * Nothing 2138355f576SJeff Roberson */ 2148355f576SJeff Roberson static void 2158355f576SJeff Roberson uma_timeout(void *unused) 2168355f576SJeff Roberson { 21786bbae32SJeff Roberson bucket_enable(); 2188355f576SJeff Roberson zone_foreach(zone_timeout); 2198355f576SJeff Roberson 2208355f576SJeff Roberson /* Reschedule this event */ 2218355f576SJeff Roberson callout_reset(&uma_callout, UMA_WORKING_TIME * hz, uma_timeout, NULL); 2228355f576SJeff Roberson } 2238355f576SJeff Roberson 2248355f576SJeff Roberson /* 2258355f576SJeff Roberson * Routine to perform timeout driven calculations. This does the working set 2268355f576SJeff Roberson * as well as hash expanding, and per cpu statistics aggregation. 2278355f576SJeff Roberson * 2288355f576SJeff Roberson * Arguments: 2298355f576SJeff Roberson * zone The zone to operate on 2308355f576SJeff Roberson * 2318355f576SJeff Roberson * Returns: 2328355f576SJeff Roberson * Nothing 2338355f576SJeff Roberson */ 2348355f576SJeff Roberson static void 2358355f576SJeff Roberson zone_timeout(uma_zone_t zone) 2368355f576SJeff Roberson { 2378355f576SJeff Roberson uma_cache_t cache; 2388355f576SJeff Roberson u_int64_t alloc; 2398355f576SJeff Roberson int free; 2408355f576SJeff Roberson int cpu; 2418355f576SJeff Roberson 2428355f576SJeff Roberson alloc = 0; 2438355f576SJeff Roberson free = 0; 2448355f576SJeff Roberson 2458355f576SJeff Roberson /* 2468355f576SJeff Roberson * Aggregate per cpu cache statistics back to the zone. 2478355f576SJeff Roberson * 2488355f576SJeff Roberson * I may rewrite this to set a flag in the per cpu cache instead of 2498355f576SJeff Roberson * locking. If the flag is not cleared on the next round I will have 2508355f576SJeff Roberson * to lock and do it here instead so that the statistics don't get too 2518355f576SJeff Roberson * far out of sync. 2528355f576SJeff Roberson */ 2538355f576SJeff Roberson if (!(zone->uz_flags & UMA_ZFLAG_INTERNAL)) { 2548355f576SJeff Roberson for (cpu = 0; cpu < maxcpu; cpu++) { 2558355f576SJeff Roberson if (CPU_ABSENT(cpu)) 2568355f576SJeff Roberson continue; 2578355f576SJeff Roberson CPU_LOCK(zone, cpu); 2588355f576SJeff Roberson cache = &zone->uz_cpu[cpu]; 2598355f576SJeff Roberson /* Add them up, and reset */ 2608355f576SJeff Roberson alloc += cache->uc_allocs; 2618355f576SJeff Roberson cache->uc_allocs = 0; 2628355f576SJeff Roberson if (cache->uc_allocbucket) 2638355f576SJeff Roberson free += cache->uc_allocbucket->ub_ptr + 1; 2648355f576SJeff Roberson if (cache->uc_freebucket) 2658355f576SJeff Roberson free += cache->uc_freebucket->ub_ptr + 1; 2668355f576SJeff Roberson CPU_UNLOCK(zone, cpu); 2678355f576SJeff Roberson } 2688355f576SJeff Roberson } 2698355f576SJeff Roberson 2708355f576SJeff Roberson /* Now push these stats back into the zone.. */ 2718355f576SJeff Roberson ZONE_LOCK(zone); 2728355f576SJeff Roberson zone->uz_allocs += alloc; 2738355f576SJeff Roberson 2748355f576SJeff Roberson /* 2758355f576SJeff Roberson * cachefree is an instantanious snapshot of what is in the per cpu 2768355f576SJeff Roberson * caches, not an accurate counter 2778355f576SJeff Roberson */ 2788355f576SJeff Roberson zone->uz_cachefree = free; 2798355f576SJeff Roberson 2808355f576SJeff Roberson /* 2818355f576SJeff Roberson * Expand the zone hash table. 2828355f576SJeff Roberson * 2838355f576SJeff Roberson * This is done if the number of slabs is larger than the hash size. 2848355f576SJeff Roberson * What I'm trying to do here is completely reduce collisions. This 2858355f576SJeff Roberson * may be a little aggressive. Should I allow for two collisions max? 2868355f576SJeff Roberson */ 2878355f576SJeff Roberson 2888355f576SJeff Roberson if ((zone->uz_flags & UMA_ZFLAG_OFFPAGE) && 2898355f576SJeff Roberson !(zone->uz_flags & UMA_ZFLAG_MALLOC)) { 2908355f576SJeff Roberson if (zone->uz_pages / zone->uz_ppera 2915300d9ddSJeff Roberson >= zone->uz_hash.uh_hashsize) { 2920aef6126SJeff Roberson struct uma_hash newhash; 2930aef6126SJeff Roberson struct uma_hash oldhash; 2940aef6126SJeff Roberson int ret; 2955300d9ddSJeff Roberson 2960aef6126SJeff Roberson /* 2970aef6126SJeff Roberson * This is so involved because allocating and freeing 2980aef6126SJeff Roberson * while the zone lock is held will lead to deadlock. 2990aef6126SJeff Roberson * I have to do everything in stages and check for 3000aef6126SJeff Roberson * races. 3010aef6126SJeff Roberson */ 3020aef6126SJeff Roberson newhash = zone->uz_hash; 3035300d9ddSJeff Roberson ZONE_UNLOCK(zone); 3040aef6126SJeff Roberson ret = hash_alloc(&newhash); 3055300d9ddSJeff Roberson ZONE_LOCK(zone); 3060aef6126SJeff Roberson if (ret) { 3070aef6126SJeff Roberson if (hash_expand(&zone->uz_hash, &newhash)) { 3080aef6126SJeff Roberson oldhash = zone->uz_hash; 3090aef6126SJeff Roberson zone->uz_hash = newhash; 3100aef6126SJeff Roberson } else 3110aef6126SJeff Roberson oldhash = newhash; 3120aef6126SJeff Roberson 3130aef6126SJeff Roberson ZONE_UNLOCK(zone); 3140aef6126SJeff Roberson hash_free(&oldhash); 3150aef6126SJeff Roberson ZONE_LOCK(zone); 3160aef6126SJeff Roberson } 3175300d9ddSJeff Roberson } 3188355f576SJeff Roberson } 3198355f576SJeff Roberson 3208355f576SJeff Roberson /* 3218355f576SJeff Roberson * Here we compute the working set size as the total number of items 3228355f576SJeff Roberson * left outstanding since the last time interval. This is slightly 3238355f576SJeff Roberson * suboptimal. What we really want is the highest number of outstanding 3248355f576SJeff Roberson * items during the last time quantum. This should be close enough. 3258355f576SJeff Roberson * 3268355f576SJeff Roberson * The working set size is used to throttle the zone_drain function. 3278355f576SJeff Roberson * We don't want to return memory that we may need again immediately. 3288355f576SJeff Roberson */ 3298355f576SJeff Roberson alloc = zone->uz_allocs - zone->uz_oallocs; 3308355f576SJeff Roberson zone->uz_oallocs = zone->uz_allocs; 3318355f576SJeff Roberson zone->uz_wssize = alloc; 3328355f576SJeff Roberson 3338355f576SJeff Roberson ZONE_UNLOCK(zone); 3348355f576SJeff Roberson } 3358355f576SJeff Roberson 3368355f576SJeff Roberson /* 3375300d9ddSJeff Roberson * Allocate and zero fill the next sized hash table from the appropriate 3385300d9ddSJeff Roberson * backing store. 3395300d9ddSJeff Roberson * 3405300d9ddSJeff Roberson * Arguments: 3410aef6126SJeff Roberson * hash A new hash structure with the old hash size in uh_hashsize 3425300d9ddSJeff Roberson * 3435300d9ddSJeff Roberson * Returns: 3440aef6126SJeff Roberson * 1 on sucess and 0 on failure. 3455300d9ddSJeff Roberson */ 3460aef6126SJeff Roberson int 3470aef6126SJeff Roberson hash_alloc(struct uma_hash *hash) 3485300d9ddSJeff Roberson { 3490aef6126SJeff Roberson int oldsize; 3505300d9ddSJeff Roberson int alloc; 3515300d9ddSJeff Roberson 3520aef6126SJeff Roberson oldsize = hash->uh_hashsize; 3530aef6126SJeff Roberson 3545300d9ddSJeff Roberson /* We're just going to go to a power of two greater */ 3550aef6126SJeff Roberson if (oldsize) { 3560aef6126SJeff Roberson hash->uh_hashsize = oldsize * 2; 3570aef6126SJeff Roberson alloc = sizeof(hash->uh_slab_hash[0]) * hash->uh_hashsize; 3585300d9ddSJeff Roberson /* XXX Shouldn't be abusing DEVBUF here */ 3590aef6126SJeff Roberson hash->uh_slab_hash = (struct slabhead *)malloc(alloc, 3600aef6126SJeff Roberson M_DEVBUF, M_NOWAIT); 3615300d9ddSJeff Roberson } else { 3620aef6126SJeff Roberson alloc = sizeof(hash->uh_slab_hash[0]) * UMA_HASH_SIZE_INIT; 3630aef6126SJeff Roberson hash->uh_slab_hash = uma_zalloc_internal(hashzone, NULL, 3640aef6126SJeff Roberson M_WAITOK, NULL); 3650aef6126SJeff Roberson hash->uh_hashsize = UMA_HASH_SIZE_INIT; 3665300d9ddSJeff Roberson } 3670aef6126SJeff Roberson if (hash->uh_slab_hash) { 3680aef6126SJeff Roberson bzero(hash->uh_slab_hash, alloc); 3690aef6126SJeff Roberson hash->uh_hashmask = hash->uh_hashsize - 1; 3700aef6126SJeff Roberson return (1); 3710aef6126SJeff Roberson } 3725300d9ddSJeff Roberson 3730aef6126SJeff Roberson return (0); 3745300d9ddSJeff Roberson } 3755300d9ddSJeff Roberson 3765300d9ddSJeff Roberson /* 3778355f576SJeff Roberson * Expands the hash table for OFFPAGE zones. This is done from zone_timeout 3788355f576SJeff Roberson * to reduce collisions. This must not be done in the regular allocation path, 3798355f576SJeff Roberson * otherwise, we can recurse on the vm while allocating pages. 3808355f576SJeff Roberson * 3818355f576SJeff Roberson * Arguments: 3820aef6126SJeff Roberson * oldhash The hash you want to expand 3830aef6126SJeff Roberson * newhash The hash structure for the new table 3848355f576SJeff Roberson * 3858355f576SJeff Roberson * Returns: 3868355f576SJeff Roberson * Nothing 3878355f576SJeff Roberson * 3888355f576SJeff Roberson * Discussion: 3898355f576SJeff Roberson */ 3900aef6126SJeff Roberson static int 3910aef6126SJeff Roberson hash_expand(struct uma_hash *oldhash, struct uma_hash *newhash) 3928355f576SJeff Roberson { 3938355f576SJeff Roberson uma_slab_t slab; 3948355f576SJeff Roberson int hval; 3958355f576SJeff Roberson int i; 3968355f576SJeff Roberson 3970aef6126SJeff Roberson if (!newhash->uh_slab_hash) 3980aef6126SJeff Roberson return (0); 3998355f576SJeff Roberson 4000aef6126SJeff Roberson if (oldhash->uh_hashsize >= newhash->uh_hashsize) 4010aef6126SJeff Roberson return (0); 4028355f576SJeff Roberson 4038355f576SJeff Roberson /* 4048355f576SJeff Roberson * I need to investigate hash algorithms for resizing without a 4058355f576SJeff Roberson * full rehash. 4068355f576SJeff Roberson */ 4078355f576SJeff Roberson 4080aef6126SJeff Roberson for (i = 0; i < oldhash->uh_hashsize; i++) 4090aef6126SJeff Roberson while (!SLIST_EMPTY(&oldhash->uh_slab_hash[i])) { 4100aef6126SJeff Roberson slab = SLIST_FIRST(&oldhash->uh_slab_hash[i]); 4110aef6126SJeff Roberson SLIST_REMOVE_HEAD(&oldhash->uh_slab_hash[i], us_hlink); 4120aef6126SJeff Roberson hval = UMA_HASH(newhash, slab->us_data); 4130aef6126SJeff Roberson SLIST_INSERT_HEAD(&newhash->uh_slab_hash[hval], 4140aef6126SJeff Roberson slab, us_hlink); 4158355f576SJeff Roberson } 4168355f576SJeff Roberson 4170aef6126SJeff Roberson return (1); 4189c2cd7e5SJeff Roberson } 4199c2cd7e5SJeff Roberson 4205300d9ddSJeff Roberson /* 4215300d9ddSJeff Roberson * Free the hash bucket to the appropriate backing store. 4225300d9ddSJeff Roberson * 4235300d9ddSJeff Roberson * Arguments: 4245300d9ddSJeff Roberson * slab_hash The hash bucket we're freeing 4255300d9ddSJeff Roberson * hashsize The number of entries in that hash bucket 4265300d9ddSJeff Roberson * 4275300d9ddSJeff Roberson * Returns: 4285300d9ddSJeff Roberson * Nothing 4295300d9ddSJeff Roberson */ 4309c2cd7e5SJeff Roberson static void 4310aef6126SJeff Roberson hash_free(struct uma_hash *hash) 4329c2cd7e5SJeff Roberson { 4330aef6126SJeff Roberson if (hash->uh_slab_hash == NULL) 4340aef6126SJeff Roberson return; 4350aef6126SJeff Roberson if (hash->uh_hashsize == UMA_HASH_SIZE_INIT) 4368355f576SJeff Roberson uma_zfree_internal(hashzone, 4370aef6126SJeff Roberson hash->uh_slab_hash, NULL, 0); 4388355f576SJeff Roberson else 4390aef6126SJeff Roberson free(hash->uh_slab_hash, M_DEVBUF); 4408355f576SJeff Roberson } 4418355f576SJeff Roberson 4428355f576SJeff Roberson /* 4438355f576SJeff Roberson * Frees all outstanding items in a bucket 4448355f576SJeff Roberson * 4458355f576SJeff Roberson * Arguments: 4468355f576SJeff Roberson * zone The zone to free to, must be unlocked. 4478355f576SJeff Roberson * bucket The free/alloc bucket with items, cpu queue must be locked. 4488355f576SJeff Roberson * 4498355f576SJeff Roberson * Returns: 4508355f576SJeff Roberson * Nothing 4518355f576SJeff Roberson */ 4528355f576SJeff Roberson 4538355f576SJeff Roberson static void 4548355f576SJeff Roberson bucket_drain(uma_zone_t zone, uma_bucket_t bucket) 4558355f576SJeff Roberson { 4568355f576SJeff Roberson uma_slab_t slab; 4578355f576SJeff Roberson int mzone; 4588355f576SJeff Roberson void *item; 4598355f576SJeff Roberson 4608355f576SJeff Roberson if (bucket == NULL) 4618355f576SJeff Roberson return; 4628355f576SJeff Roberson 4638355f576SJeff Roberson slab = NULL; 4648355f576SJeff Roberson mzone = 0; 4658355f576SJeff Roberson 4668355f576SJeff Roberson /* We have to lookup the slab again for malloc.. */ 4678355f576SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_MALLOC) 4688355f576SJeff Roberson mzone = 1; 4698355f576SJeff Roberson 4708355f576SJeff Roberson while (bucket->ub_ptr > -1) { 4718355f576SJeff Roberson item = bucket->ub_bucket[bucket->ub_ptr]; 4728355f576SJeff Roberson #ifdef INVARIANTS 4738355f576SJeff Roberson bucket->ub_bucket[bucket->ub_ptr] = NULL; 4748355f576SJeff Roberson KASSERT(item != NULL, 4758355f576SJeff Roberson ("bucket_drain: botched ptr, item is NULL")); 4768355f576SJeff Roberson #endif 4778355f576SJeff Roberson bucket->ub_ptr--; 4788355f576SJeff Roberson /* 4798355f576SJeff Roberson * This is extremely inefficient. The slab pointer was passed 4808355f576SJeff Roberson * to uma_zfree_arg, but we lost it because the buckets don't 4818355f576SJeff Roberson * hold them. This will go away when free() gets a size passed 4828355f576SJeff Roberson * to it. 4838355f576SJeff Roberson */ 4845a34a9f0SJeff Roberson if (mzone) { 4855a34a9f0SJeff Roberson mtx_lock(&malloc_mtx); 4868355f576SJeff Roberson slab = hash_sfind(mallochash, 4878355f576SJeff Roberson (u_int8_t *)((unsigned long)item & 4888355f576SJeff Roberson (~UMA_SLAB_MASK))); 4895a34a9f0SJeff Roberson mtx_unlock(&malloc_mtx); 4905a34a9f0SJeff Roberson } 4918355f576SJeff Roberson uma_zfree_internal(zone, item, slab, 1); 4928355f576SJeff Roberson } 4938355f576SJeff Roberson } 4948355f576SJeff Roberson 4958355f576SJeff Roberson /* 4968355f576SJeff Roberson * Drains the per cpu caches for a zone. 4978355f576SJeff Roberson * 4988355f576SJeff Roberson * Arguments: 4998355f576SJeff Roberson * zone The zone to drain, must be unlocked. 5008355f576SJeff Roberson * 5018355f576SJeff Roberson * Returns: 5028355f576SJeff Roberson * Nothing 5038355f576SJeff Roberson * 5048355f576SJeff Roberson * This function returns with the zone locked so that the per cpu queues can 5058355f576SJeff Roberson * not be filled until zone_drain is finished. 5068355f576SJeff Roberson * 5078355f576SJeff Roberson */ 5088355f576SJeff Roberson static void 5098355f576SJeff Roberson cache_drain(uma_zone_t zone) 5108355f576SJeff Roberson { 5118355f576SJeff Roberson uma_bucket_t bucket; 5128355f576SJeff Roberson uma_cache_t cache; 5138355f576SJeff Roberson int cpu; 5148355f576SJeff Roberson 5158355f576SJeff Roberson /* 5168355f576SJeff Roberson * Flush out the per cpu queues. 5178355f576SJeff Roberson * 518157d7b35SAlfred Perlstein * XXX This causes unnecessary thrashing due to immediately having 5198355f576SJeff Roberson * empty per cpu queues. I need to improve this. 5208355f576SJeff Roberson */ 5218355f576SJeff Roberson 5228355f576SJeff Roberson /* 5238355f576SJeff Roberson * We have to lock each cpu cache before locking the zone 5248355f576SJeff Roberson */ 5258355f576SJeff Roberson ZONE_UNLOCK(zone); 5268355f576SJeff Roberson 5278355f576SJeff Roberson for (cpu = 0; cpu < maxcpu; cpu++) { 5288355f576SJeff Roberson if (CPU_ABSENT(cpu)) 5298355f576SJeff Roberson continue; 5308355f576SJeff Roberson CPU_LOCK(zone, cpu); 5318355f576SJeff Roberson cache = &zone->uz_cpu[cpu]; 5328355f576SJeff Roberson bucket_drain(zone, cache->uc_allocbucket); 5338355f576SJeff Roberson bucket_drain(zone, cache->uc_freebucket); 5348355f576SJeff Roberson } 5358355f576SJeff Roberson 5368355f576SJeff Roberson /* 5378355f576SJeff Roberson * Drain the bucket queues and free the buckets, we just keep two per 5388355f576SJeff Roberson * cpu (alloc/free). 5398355f576SJeff Roberson */ 5408355f576SJeff Roberson ZONE_LOCK(zone); 5418355f576SJeff Roberson while ((bucket = LIST_FIRST(&zone->uz_full_bucket)) != NULL) { 5428355f576SJeff Roberson LIST_REMOVE(bucket, ub_link); 5438355f576SJeff Roberson ZONE_UNLOCK(zone); 5448355f576SJeff Roberson bucket_drain(zone, bucket); 5458355f576SJeff Roberson uma_zfree_internal(bucketzone, bucket, NULL, 0); 5468355f576SJeff Roberson ZONE_LOCK(zone); 5478355f576SJeff Roberson } 5488355f576SJeff Roberson 5498355f576SJeff Roberson /* Now we do the free queue.. */ 5508355f576SJeff Roberson while ((bucket = LIST_FIRST(&zone->uz_free_bucket)) != NULL) { 5518355f576SJeff Roberson LIST_REMOVE(bucket, ub_link); 5528355f576SJeff Roberson uma_zfree_internal(bucketzone, bucket, NULL, 0); 5538355f576SJeff Roberson } 5548355f576SJeff Roberson 5558355f576SJeff Roberson /* We unlock here, but they will all block until the zone is unlocked */ 5568355f576SJeff Roberson for (cpu = 0; cpu < maxcpu; cpu++) { 5578355f576SJeff Roberson if (CPU_ABSENT(cpu)) 5588355f576SJeff Roberson continue; 5598355f576SJeff Roberson CPU_UNLOCK(zone, cpu); 5608355f576SJeff Roberson } 561f4af24d5SJeff Roberson 562f4af24d5SJeff Roberson zone->uz_cachefree = 0; 5638355f576SJeff Roberson } 5648355f576SJeff Roberson 5658355f576SJeff Roberson /* 5668355f576SJeff Roberson * Frees pages from a zone back to the system. This is done on demand from 5678355f576SJeff Roberson * the pageout daemon. 5688355f576SJeff Roberson * 5698355f576SJeff Roberson * Arguments: 5708355f576SJeff Roberson * zone The zone to free pages from 5719c2cd7e5SJeff Roberson * all Should we drain all items? 5728355f576SJeff Roberson * 5738355f576SJeff Roberson * Returns: 5748355f576SJeff Roberson * Nothing. 5758355f576SJeff Roberson */ 5768355f576SJeff Roberson static void 5778355f576SJeff Roberson zone_drain(uma_zone_t zone) 5788355f576SJeff Roberson { 579713deb36SJeff Roberson struct slabhead freeslabs = {}; 5808355f576SJeff Roberson uma_slab_t slab; 5818355f576SJeff Roberson uma_slab_t n; 5828355f576SJeff Roberson u_int64_t extra; 5838355f576SJeff Roberson u_int8_t flags; 5848355f576SJeff Roberson u_int8_t *mem; 5858355f576SJeff Roberson int i; 5868355f576SJeff Roberson 5878355f576SJeff Roberson /* 5888355f576SJeff Roberson * We don't want to take pages from staticly allocated zones at this 5898355f576SJeff Roberson * time 5908355f576SJeff Roberson */ 5918355f576SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_NOFREE || zone->uz_freef == NULL) 5928355f576SJeff Roberson return; 5938355f576SJeff Roberson 5948355f576SJeff Roberson ZONE_LOCK(zone); 5958355f576SJeff Roberson 5968355f576SJeff Roberson if (!(zone->uz_flags & UMA_ZFLAG_INTERNAL)) 5978355f576SJeff Roberson cache_drain(zone); 5988355f576SJeff Roberson 5998355f576SJeff Roberson if (zone->uz_free < zone->uz_wssize) 6008355f576SJeff Roberson goto finished; 6018355f576SJeff Roberson #ifdef UMA_DEBUG 6028355f576SJeff Roberson printf("%s working set size: %llu free items: %u\n", 6038355f576SJeff Roberson zone->uz_name, (unsigned long long)zone->uz_wssize, zone->uz_free); 6048355f576SJeff Roberson #endif 6059c2cd7e5SJeff Roberson extra = zone->uz_free - zone->uz_wssize; 6068355f576SJeff Roberson extra /= zone->uz_ipers; 6078355f576SJeff Roberson 6088355f576SJeff Roberson /* extra is now the number of extra slabs that we can free */ 6098355f576SJeff Roberson 6108355f576SJeff Roberson if (extra == 0) 6118355f576SJeff Roberson goto finished; 6128355f576SJeff Roberson 6138355f576SJeff Roberson slab = LIST_FIRST(&zone->uz_free_slab); 6148355f576SJeff Roberson while (slab && extra) { 6158355f576SJeff Roberson n = LIST_NEXT(slab, us_link); 6168355f576SJeff Roberson 6178355f576SJeff Roberson /* We have no where to free these to */ 6188355f576SJeff Roberson if (slab->us_flags & UMA_SLAB_BOOT) { 6198355f576SJeff Roberson slab = n; 6208355f576SJeff Roberson continue; 6218355f576SJeff Roberson } 6228355f576SJeff Roberson 6238355f576SJeff Roberson LIST_REMOVE(slab, us_link); 6248355f576SJeff Roberson zone->uz_pages -= zone->uz_ppera; 6258355f576SJeff Roberson zone->uz_free -= zone->uz_ipers; 626713deb36SJeff Roberson 627713deb36SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_MALLOC) { 628713deb36SJeff Roberson mtx_lock(&malloc_mtx); 629713deb36SJeff Roberson UMA_HASH_REMOVE(mallochash, slab, slab->us_data); 630713deb36SJeff Roberson mtx_unlock(&malloc_mtx); 631713deb36SJeff Roberson } 632713deb36SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_OFFPAGE && 633713deb36SJeff Roberson !(zone->uz_flags & UMA_ZFLAG_MALLOC)) 634713deb36SJeff Roberson UMA_HASH_REMOVE(&zone->uz_hash, slab, slab->us_data); 635713deb36SJeff Roberson 636713deb36SJeff Roberson SLIST_INSERT_HEAD(&freeslabs, slab, us_hlink); 637713deb36SJeff Roberson 638713deb36SJeff Roberson slab = n; 639713deb36SJeff Roberson extra--; 640713deb36SJeff Roberson } 641713deb36SJeff Roberson finished: 642713deb36SJeff Roberson ZONE_UNLOCK(zone); 643713deb36SJeff Roberson 644713deb36SJeff Roberson while ((slab = SLIST_FIRST(&freeslabs)) != NULL) { 645713deb36SJeff Roberson SLIST_REMOVE(&freeslabs, slab, uma_slab, us_hlink); 6468355f576SJeff Roberson if (zone->uz_fini) 6478355f576SJeff Roberson for (i = 0; i < zone->uz_ipers; i++) 6488355f576SJeff Roberson zone->uz_fini( 6498355f576SJeff Roberson slab->us_data + (zone->uz_rsize * i), 6508355f576SJeff Roberson zone->uz_size); 6518355f576SJeff Roberson flags = slab->us_flags; 6528355f576SJeff Roberson mem = slab->us_data; 6535a34a9f0SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_OFFPAGE) { 6548355f576SJeff Roberson uma_zfree_internal(slabzone, slab, NULL, 0); 6555a34a9f0SJeff Roberson } 6568355f576SJeff Roberson #ifdef UMA_DEBUG 6578355f576SJeff Roberson printf("%s: Returning %d bytes.\n", 6588355f576SJeff Roberson zone->uz_name, UMA_SLAB_SIZE * zone->uz_ppera); 6598355f576SJeff Roberson #endif 6608355f576SJeff Roberson zone->uz_freef(mem, UMA_SLAB_SIZE * zone->uz_ppera, flags); 6618355f576SJeff Roberson } 6628355f576SJeff Roberson 6638355f576SJeff Roberson } 6648355f576SJeff Roberson 6658355f576SJeff Roberson /* 6668355f576SJeff Roberson * Allocate a new slab for a zone. This does not insert the slab onto a list. 6678355f576SJeff Roberson * 6688355f576SJeff Roberson * Arguments: 6698355f576SJeff Roberson * zone The zone to allocate slabs for 6708355f576SJeff Roberson * wait Shall we wait? 6718355f576SJeff Roberson * 6728355f576SJeff Roberson * Returns: 6738355f576SJeff Roberson * The slab that was allocated or NULL if there is no memory and the 6748355f576SJeff Roberson * caller specified M_NOWAIT. 6758355f576SJeff Roberson * 6768355f576SJeff Roberson */ 6778355f576SJeff Roberson static uma_slab_t 6788355f576SJeff Roberson slab_zalloc(uma_zone_t zone, int wait) 6798355f576SJeff Roberson { 6808355f576SJeff Roberson uma_slab_t slab; /* Starting slab */ 6818355f576SJeff Roberson u_int8_t *mem; 6828355f576SJeff Roberson u_int8_t flags; 6838355f576SJeff Roberson int i; 6848355f576SJeff Roberson 685a553d4b8SJeff Roberson slab = NULL; 686a553d4b8SJeff Roberson 6878355f576SJeff Roberson #ifdef UMA_DEBUG 6888355f576SJeff Roberson printf("slab_zalloc: Allocating a new slab for %s\n", zone->uz_name); 6898355f576SJeff Roberson #endif 6908355f576SJeff Roberson ZONE_UNLOCK(zone); 691a553d4b8SJeff Roberson 692a553d4b8SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_OFFPAGE) { 693a553d4b8SJeff Roberson slab = uma_zalloc_internal(slabzone, NULL, wait, NULL); 694a553d4b8SJeff Roberson if (slab == NULL) { 695a553d4b8SJeff Roberson ZONE_LOCK(zone); 696a553d4b8SJeff Roberson return NULL; 697a553d4b8SJeff Roberson } 698a553d4b8SJeff Roberson } 699a553d4b8SJeff Roberson 700a553d4b8SJeff Roberson if (booted || (zone->uz_flags & UMA_ZFLAG_PRIVALLOC)) { 7018355f576SJeff Roberson mtx_lock(&Giant); 702a553d4b8SJeff Roberson mem = zone->uz_allocf(zone, 7038355f576SJeff Roberson zone->uz_ppera * UMA_SLAB_SIZE, &flags, wait); 7048355f576SJeff Roberson mtx_unlock(&Giant); 705a553d4b8SJeff Roberson if (mem == NULL) { 7068355f576SJeff Roberson ZONE_LOCK(zone); 7078355f576SJeff Roberson return (NULL); 708a553d4b8SJeff Roberson } 7098355f576SJeff Roberson } else { 710a553d4b8SJeff Roberson uma_slab_t tmps; 7118355f576SJeff Roberson 7128355f576SJeff Roberson if (zone->uz_ppera > 1) 7138355f576SJeff Roberson panic("UMA: Attemping to allocate multiple pages before vm has started.\n"); 7148355f576SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_MALLOC) 7158355f576SJeff Roberson panic("Mallocing before uma_startup2 has been called.\n"); 7168355f576SJeff Roberson if (uma_boot_free == 0) 7178355f576SJeff Roberson panic("UMA: Ran out of pre init pages, increase UMA_BOOT_PAGES\n"); 718a553d4b8SJeff Roberson tmps = LIST_FIRST(&uma_boot_pages); 719a553d4b8SJeff Roberson LIST_REMOVE(tmps, us_link); 7208355f576SJeff Roberson uma_boot_free--; 721a553d4b8SJeff Roberson mem = tmps->us_data; 7228355f576SJeff Roberson } 7238355f576SJeff Roberson 724a553d4b8SJeff Roberson ZONE_LOCK(zone); 7258355f576SJeff Roberson 7268355f576SJeff Roberson /* Alloc slab structure for offpage, otherwise adjust it's position */ 7278355f576SJeff Roberson if (!(zone->uz_flags & UMA_ZFLAG_OFFPAGE)) { 7288355f576SJeff Roberson slab = (uma_slab_t )(mem + zone->uz_pgoff); 7298355f576SJeff Roberson } else { 7308355f576SJeff Roberson if (!(zone->uz_flags & UMA_ZFLAG_MALLOC)) 7318355f576SJeff Roberson UMA_HASH_INSERT(&zone->uz_hash, slab, mem); 7328355f576SJeff Roberson } 7338355f576SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_MALLOC) { 7348355f576SJeff Roberson #ifdef UMA_DEBUG 7358355f576SJeff Roberson printf("Inserting %p into malloc hash from slab %p\n", 7368355f576SJeff Roberson mem, slab); 7378355f576SJeff Roberson #endif 7385a34a9f0SJeff Roberson mtx_lock(&malloc_mtx); 7398355f576SJeff Roberson UMA_HASH_INSERT(mallochash, slab, mem); 7405a34a9f0SJeff Roberson mtx_unlock(&malloc_mtx); 7418355f576SJeff Roberson } 7428355f576SJeff Roberson 7438355f576SJeff Roberson slab->us_zone = zone; 7448355f576SJeff Roberson slab->us_data = mem; 7458355f576SJeff Roberson 7468355f576SJeff Roberson /* 7478355f576SJeff Roberson * This is intended to spread data out across cache lines. 7488355f576SJeff Roberson * 7498355f576SJeff Roberson * This code doesn't seem to work properly on x86, and on alpha 7508355f576SJeff Roberson * it makes absolutely no performance difference. I'm sure it could 7518355f576SJeff Roberson * use some tuning, but sun makes outrageous claims about it's 7528355f576SJeff Roberson * performance. 7538355f576SJeff Roberson */ 7548355f576SJeff Roberson #if 0 7558355f576SJeff Roberson if (zone->uz_cachemax) { 7568355f576SJeff Roberson slab->us_data += zone->uz_cacheoff; 7578355f576SJeff Roberson zone->uz_cacheoff += UMA_CACHE_INC; 7588355f576SJeff Roberson if (zone->uz_cacheoff > zone->uz_cachemax) 7598355f576SJeff Roberson zone->uz_cacheoff = 0; 7608355f576SJeff Roberson } 7618355f576SJeff Roberson #endif 7628355f576SJeff Roberson 7638355f576SJeff Roberson slab->us_freecount = zone->uz_ipers; 7648355f576SJeff Roberson slab->us_firstfree = 0; 7658355f576SJeff Roberson slab->us_flags = flags; 7668355f576SJeff Roberson for (i = 0; i < zone->uz_ipers; i++) 7678355f576SJeff Roberson slab->us_freelist[i] = i+1; 7688355f576SJeff Roberson 7698355f576SJeff Roberson if (zone->uz_init) 7708355f576SJeff Roberson for (i = 0; i < zone->uz_ipers; i++) 7718355f576SJeff Roberson zone->uz_init(slab->us_data + (zone->uz_rsize * i), 7728355f576SJeff Roberson zone->uz_size); 7738355f576SJeff Roberson 7748355f576SJeff Roberson zone->uz_pages += zone->uz_ppera; 7758355f576SJeff Roberson zone->uz_free += zone->uz_ipers; 7768355f576SJeff Roberson 7778355f576SJeff Roberson return (slab); 7788355f576SJeff Roberson } 7798355f576SJeff Roberson 7808355f576SJeff Roberson /* 7818355f576SJeff Roberson * Allocates a number of pages from the system 7828355f576SJeff Roberson * 7838355f576SJeff Roberson * Arguments: 7848355f576SJeff Roberson * zone Unused 7858355f576SJeff Roberson * bytes The number of bytes requested 7868355f576SJeff Roberson * wait Shall we wait? 7878355f576SJeff Roberson * 7888355f576SJeff Roberson * Returns: 7898355f576SJeff Roberson * A pointer to the alloced memory or possibly 7908355f576SJeff Roberson * NULL if M_NOWAIT is set. 7918355f576SJeff Roberson */ 7928355f576SJeff Roberson static void * 7938355f576SJeff Roberson page_alloc(uma_zone_t zone, int bytes, u_int8_t *pflag, int wait) 7948355f576SJeff Roberson { 7958355f576SJeff Roberson void *p; /* Returned page */ 7968355f576SJeff Roberson 7978355f576SJeff Roberson /* 7988355f576SJeff Roberson * XXX The original zone allocator did this, but I don't think it's 799157d7b35SAlfred Perlstein * necessary in current. 8008355f576SJeff Roberson */ 8018355f576SJeff Roberson 8028355f576SJeff Roberson if (lockstatus(&kernel_map->lock, NULL)) { 8038355f576SJeff Roberson *pflag = UMA_SLAB_KMEM; 8048355f576SJeff Roberson p = (void *) kmem_malloc(kmem_map, bytes, wait); 8058355f576SJeff Roberson } else { 8068355f576SJeff Roberson *pflag = UMA_SLAB_KMAP; 8078355f576SJeff Roberson p = (void *) kmem_alloc(kernel_map, bytes); 8088355f576SJeff Roberson } 8098355f576SJeff Roberson 8108355f576SJeff Roberson return (p); 8118355f576SJeff Roberson } 8128355f576SJeff Roberson 8138355f576SJeff Roberson /* 8148355f576SJeff Roberson * Allocates a number of pages from within an object 8158355f576SJeff Roberson * 8168355f576SJeff Roberson * Arguments: 8178355f576SJeff Roberson * zone Unused 8188355f576SJeff Roberson * bytes The number of bytes requested 8198355f576SJeff Roberson * wait Shall we wait? 8208355f576SJeff Roberson * 8218355f576SJeff Roberson * Returns: 8228355f576SJeff Roberson * A pointer to the alloced memory or possibly 8238355f576SJeff Roberson * NULL if M_NOWAIT is set. 8248355f576SJeff Roberson */ 8258355f576SJeff Roberson static void * 8268355f576SJeff Roberson obj_alloc(uma_zone_t zone, int bytes, u_int8_t *flags, int wait) 8278355f576SJeff Roberson { 8288355f576SJeff Roberson vm_offset_t zkva; 8298355f576SJeff Roberson vm_offset_t retkva; 8308355f576SJeff Roberson vm_page_t p; 8318355f576SJeff Roberson int pages; 8328355f576SJeff Roberson 8338355f576SJeff Roberson retkva = NULL; 8348355f576SJeff Roberson pages = zone->uz_pages; 8358355f576SJeff Roberson 8368355f576SJeff Roberson /* 8378355f576SJeff Roberson * This looks a little weird since we're getting one page at a time 8388355f576SJeff Roberson */ 8398355f576SJeff Roberson while (bytes > 0) { 8408355f576SJeff Roberson p = vm_page_alloc(zone->uz_obj, pages, 8418355f576SJeff Roberson VM_ALLOC_INTERRUPT); 8428355f576SJeff Roberson if (p == NULL) 8438355f576SJeff Roberson return (NULL); 8448355f576SJeff Roberson 8458355f576SJeff Roberson zkva = zone->uz_kva + pages * PAGE_SIZE; 8468355f576SJeff Roberson if (retkva == NULL) 8478355f576SJeff Roberson retkva = zkva; 8488355f576SJeff Roberson pmap_qenter(zkva, &p, 1); 8498355f576SJeff Roberson bytes -= PAGE_SIZE; 8508355f576SJeff Roberson pages += 1; 8518355f576SJeff Roberson } 8528355f576SJeff Roberson 8538355f576SJeff Roberson *flags = UMA_SLAB_PRIV; 8548355f576SJeff Roberson 8558355f576SJeff Roberson return ((void *)retkva); 8568355f576SJeff Roberson } 8578355f576SJeff Roberson 8588355f576SJeff Roberson /* 8598355f576SJeff Roberson * Frees a number of pages to the system 8608355f576SJeff Roberson * 8618355f576SJeff Roberson * Arguments: 8628355f576SJeff Roberson * mem A pointer to the memory to be freed 8638355f576SJeff Roberson * size The size of the memory being freed 8648355f576SJeff Roberson * flags The original p->us_flags field 8658355f576SJeff Roberson * 8668355f576SJeff Roberson * Returns: 8678355f576SJeff Roberson * Nothing 8688355f576SJeff Roberson * 8698355f576SJeff Roberson */ 8708355f576SJeff Roberson static void 8718355f576SJeff Roberson page_free(void *mem, int size, u_int8_t flags) 8728355f576SJeff Roberson { 8738355f576SJeff Roberson vm_map_t map; 8748355f576SJeff Roberson if (flags & UMA_SLAB_KMEM) 8758355f576SJeff Roberson map = kmem_map; 8768355f576SJeff Roberson else if (flags & UMA_SLAB_KMAP) 8778355f576SJeff Roberson map = kernel_map; 8788355f576SJeff Roberson else 8798355f576SJeff Roberson panic("UMA: page_free used with invalid flags %d\n", flags); 8808355f576SJeff Roberson 8818355f576SJeff Roberson kmem_free(map, (vm_offset_t)mem, size); 8828355f576SJeff Roberson } 8838355f576SJeff Roberson 8848355f576SJeff Roberson /* 8858355f576SJeff Roberson * Zero fill initializer 8868355f576SJeff Roberson * 8878355f576SJeff Roberson * Arguments/Returns follow uma_init specifications 8888355f576SJeff Roberson * 8898355f576SJeff Roberson */ 8908355f576SJeff Roberson static void 8918355f576SJeff Roberson zero_init(void *mem, int size) 8928355f576SJeff Roberson { 8938355f576SJeff Roberson bzero(mem, size); 8948355f576SJeff Roberson } 8958355f576SJeff Roberson 8968355f576SJeff Roberson /* 8978355f576SJeff Roberson * Finish creating a small uma zone. This calculates ipers, and the zone size. 8988355f576SJeff Roberson * 8998355f576SJeff Roberson * Arguments 9008355f576SJeff Roberson * zone The zone we should initialize 9018355f576SJeff Roberson * 9028355f576SJeff Roberson * Returns 9038355f576SJeff Roberson * Nothing 9048355f576SJeff Roberson */ 9058355f576SJeff Roberson static void 9068355f576SJeff Roberson zone_small_init(uma_zone_t zone) 9078355f576SJeff Roberson { 9088355f576SJeff Roberson int rsize; 9098355f576SJeff Roberson int memused; 9108355f576SJeff Roberson int ipers; 9118355f576SJeff Roberson 9128355f576SJeff Roberson rsize = zone->uz_size; 9138355f576SJeff Roberson 9148355f576SJeff Roberson if (rsize < UMA_SMALLEST_UNIT) 9158355f576SJeff Roberson rsize = UMA_SMALLEST_UNIT; 9168355f576SJeff Roberson 9178355f576SJeff Roberson if (rsize & zone->uz_align) 9188355f576SJeff Roberson rsize = (rsize & ~zone->uz_align) + (zone->uz_align + 1); 9198355f576SJeff Roberson 9208355f576SJeff Roberson zone->uz_rsize = rsize; 9218355f576SJeff Roberson 9228355f576SJeff Roberson rsize += 1; /* Account for the byte of linkage */ 9238355f576SJeff Roberson zone->uz_ipers = (UMA_SLAB_SIZE - sizeof(struct uma_slab)) / rsize; 9248355f576SJeff Roberson zone->uz_ppera = 1; 9258355f576SJeff Roberson 9268355f576SJeff Roberson memused = zone->uz_ipers * zone->uz_rsize; 9278355f576SJeff Roberson 9288355f576SJeff Roberson /* Can we do any better? */ 9298355f576SJeff Roberson if ((UMA_SLAB_SIZE - memused) >= UMA_MAX_WASTE) { 9308355f576SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_INTERNAL) 9318355f576SJeff Roberson return; 9328355f576SJeff Roberson ipers = UMA_SLAB_SIZE / zone->uz_rsize; 9338355f576SJeff Roberson if (ipers > zone->uz_ipers) { 9348355f576SJeff Roberson zone->uz_flags |= UMA_ZFLAG_OFFPAGE; 9358355f576SJeff Roberson zone->uz_ipers = ipers; 9368355f576SJeff Roberson } 9378355f576SJeff Roberson } 9388355f576SJeff Roberson 9398355f576SJeff Roberson } 9408355f576SJeff Roberson 9418355f576SJeff Roberson /* 9428355f576SJeff Roberson * Finish creating a large (> UMA_SLAB_SIZE) uma zone. Just give in and do 9438355f576SJeff Roberson * OFFPAGE for now. When I can allow for more dynamic slab sizes this will be 9448355f576SJeff Roberson * more complicated. 9458355f576SJeff Roberson * 9468355f576SJeff Roberson * Arguments 9478355f576SJeff Roberson * zone The zone we should initialize 9488355f576SJeff Roberson * 9498355f576SJeff Roberson * Returns 9508355f576SJeff Roberson * Nothing 9518355f576SJeff Roberson */ 9528355f576SJeff Roberson static void 9538355f576SJeff Roberson zone_large_init(uma_zone_t zone) 9548355f576SJeff Roberson { 9558355f576SJeff Roberson int pages; 9568355f576SJeff Roberson 9578355f576SJeff Roberson pages = zone->uz_size / UMA_SLAB_SIZE; 9588355f576SJeff Roberson 9598355f576SJeff Roberson /* Account for remainder */ 9608355f576SJeff Roberson if ((pages * UMA_SLAB_SIZE) < zone->uz_size) 9618355f576SJeff Roberson pages++; 9628355f576SJeff Roberson 9638355f576SJeff Roberson zone->uz_ppera = pages; 9648355f576SJeff Roberson zone->uz_ipers = 1; 9658355f576SJeff Roberson 9668355f576SJeff Roberson zone->uz_flags |= UMA_ZFLAG_OFFPAGE; 9678355f576SJeff Roberson zone->uz_rsize = zone->uz_size; 9688355f576SJeff Roberson } 9698355f576SJeff Roberson 9708355f576SJeff Roberson /* 9718355f576SJeff Roberson * Zone header ctor. This initializes all fields, locks, etc. And inserts 9728355f576SJeff Roberson * the zone onto the global zone list. 9738355f576SJeff Roberson * 9748355f576SJeff Roberson * Arguments/Returns follow uma_ctor specifications 9758355f576SJeff Roberson * udata Actually uma_zcreat_args 9768355f576SJeff Roberson * 9778355f576SJeff Roberson */ 9788355f576SJeff Roberson 9798355f576SJeff Roberson static void 9808355f576SJeff Roberson zone_ctor(void *mem, int size, void *udata) 9818355f576SJeff Roberson { 9828355f576SJeff Roberson struct uma_zctor_args *arg = udata; 9838355f576SJeff Roberson uma_zone_t zone = mem; 98428bc4419SJeff Roberson int privlc; 9858355f576SJeff Roberson int cplen; 9868355f576SJeff Roberson int cpu; 9878355f576SJeff Roberson 9888355f576SJeff Roberson bzero(zone, size); 9898355f576SJeff Roberson zone->uz_name = arg->name; 9908355f576SJeff Roberson zone->uz_size = arg->size; 9918355f576SJeff Roberson zone->uz_ctor = arg->ctor; 9928355f576SJeff Roberson zone->uz_dtor = arg->dtor; 9938355f576SJeff Roberson zone->uz_init = arg->uminit; 9948355f576SJeff Roberson zone->uz_align = arg->align; 9958355f576SJeff Roberson zone->uz_free = 0; 9968355f576SJeff Roberson zone->uz_pages = 0; 9978355f576SJeff Roberson zone->uz_flags = 0; 9988355f576SJeff Roberson zone->uz_allocf = page_alloc; 9998355f576SJeff Roberson zone->uz_freef = page_free; 10008355f576SJeff Roberson 10018355f576SJeff Roberson if (arg->flags & UMA_ZONE_ZINIT) 10028355f576SJeff Roberson zone->uz_init = zero_init; 10038355f576SJeff Roberson 10048355f576SJeff Roberson if (arg->flags & UMA_ZONE_INTERNAL) 10058355f576SJeff Roberson zone->uz_flags |= UMA_ZFLAG_INTERNAL; 10068355f576SJeff Roberson 10078355f576SJeff Roberson if (arg->flags & UMA_ZONE_MALLOC) 10088355f576SJeff Roberson zone->uz_flags |= UMA_ZFLAG_MALLOC; 10098355f576SJeff Roberson 10108355f576SJeff Roberson if (arg->flags & UMA_ZONE_NOFREE) 10118355f576SJeff Roberson zone->uz_flags |= UMA_ZFLAG_NOFREE; 10128355f576SJeff Roberson 10138355f576SJeff Roberson if (zone->uz_size > UMA_SLAB_SIZE) 10148355f576SJeff Roberson zone_large_init(zone); 10158355f576SJeff Roberson else 10168355f576SJeff Roberson zone_small_init(zone); 10178355f576SJeff Roberson 101828bc4419SJeff Roberson if (arg->flags & UMA_ZONE_MTXCLASS) 101928bc4419SJeff Roberson privlc = 1; 102028bc4419SJeff Roberson else 102128bc4419SJeff Roberson privlc = 0; 102228bc4419SJeff Roberson 10238355f576SJeff Roberson /* We do this so that the per cpu lock name is unique for each zone */ 10248355f576SJeff Roberson memcpy(zone->uz_lname, "PCPU ", 5); 10258355f576SJeff Roberson cplen = min(strlen(zone->uz_name) + 1, LOCKNAME_LEN - 6); 10268355f576SJeff Roberson memcpy(zone->uz_lname+5, zone->uz_name, cplen); 10278355f576SJeff Roberson zone->uz_lname[LOCKNAME_LEN - 1] = '\0'; 10288355f576SJeff Roberson 10298355f576SJeff Roberson /* 10308355f576SJeff Roberson * If we're putting the slab header in the actual page we need to 10318355f576SJeff Roberson * figure out where in each page it goes. This calculates a right 10328355f576SJeff Roberson * justified offset into the memory on a ALIGN_PTR boundary. 10338355f576SJeff Roberson */ 10348355f576SJeff Roberson if (!(zone->uz_flags & UMA_ZFLAG_OFFPAGE)) { 10358355f576SJeff Roberson int totsize; 10368355f576SJeff Roberson int waste; 10378355f576SJeff Roberson 10388355f576SJeff Roberson /* Size of the slab struct and free list */ 10398355f576SJeff Roberson totsize = sizeof(struct uma_slab) + zone->uz_ipers; 10408355f576SJeff Roberson if (totsize & UMA_ALIGN_PTR) 10418355f576SJeff Roberson totsize = (totsize & ~UMA_ALIGN_PTR) + 10428355f576SJeff Roberson (UMA_ALIGN_PTR + 1); 10438355f576SJeff Roberson zone->uz_pgoff = UMA_SLAB_SIZE - totsize; 10448355f576SJeff Roberson 10458355f576SJeff Roberson waste = zone->uz_pgoff; 10468355f576SJeff Roberson waste -= (zone->uz_ipers * zone->uz_rsize); 10478355f576SJeff Roberson 10488355f576SJeff Roberson /* 10498355f576SJeff Roberson * This calculates how much space we have for cache line size 10508355f576SJeff Roberson * optimizations. It works by offseting each slab slightly. 10518355f576SJeff Roberson * Currently it breaks on x86, and so it is disabled. 10528355f576SJeff Roberson */ 10538355f576SJeff Roberson 10548355f576SJeff Roberson if (zone->uz_align < UMA_CACHE_INC && waste > UMA_CACHE_INC) { 10558355f576SJeff Roberson zone->uz_cachemax = waste - UMA_CACHE_INC; 10568355f576SJeff Roberson zone->uz_cacheoff = 0; 10578355f576SJeff Roberson } 10588355f576SJeff Roberson 10598355f576SJeff Roberson totsize = zone->uz_pgoff + sizeof(struct uma_slab) 10608355f576SJeff Roberson + zone->uz_ipers; 10618355f576SJeff Roberson /* I don't think it's possible, but I'll make sure anyway */ 10628355f576SJeff Roberson if (totsize > UMA_SLAB_SIZE) { 10638355f576SJeff Roberson printf("zone %s ipers %d rsize %d size %d\n", 10648355f576SJeff Roberson zone->uz_name, zone->uz_ipers, zone->uz_rsize, 10658355f576SJeff Roberson zone->uz_size); 10668355f576SJeff Roberson panic("UMA slab won't fit.\n"); 10678355f576SJeff Roberson } 10688355f576SJeff Roberson } else { 10690aef6126SJeff Roberson hash_alloc(&zone->uz_hash); 10708355f576SJeff Roberson zone->uz_pgoff = 0; 10718355f576SJeff Roberson } 10728355f576SJeff Roberson 10738355f576SJeff Roberson #ifdef UMA_DEBUG 10748355f576SJeff Roberson printf("%s(%p) size = %d ipers = %d ppera = %d pgoff = %d\n", 10758355f576SJeff Roberson zone->uz_name, zone, 10768355f576SJeff Roberson zone->uz_size, zone->uz_ipers, 10778355f576SJeff Roberson zone->uz_ppera, zone->uz_pgoff); 10788355f576SJeff Roberson #endif 107928bc4419SJeff Roberson ZONE_LOCK_INIT(zone, privlc); 10808355f576SJeff Roberson 10818355f576SJeff Roberson mtx_lock(&uma_mtx); 10828355f576SJeff Roberson LIST_INSERT_HEAD(&uma_zones, zone, uz_link); 10838355f576SJeff Roberson mtx_unlock(&uma_mtx); 10848355f576SJeff Roberson 10858355f576SJeff Roberson /* 10868355f576SJeff Roberson * Some internal zones don't have room allocated for the per cpu 10878355f576SJeff Roberson * caches. If we're internal, bail out here. 10888355f576SJeff Roberson */ 10898355f576SJeff Roberson 10908355f576SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_INTERNAL) 10918355f576SJeff Roberson return; 10928355f576SJeff Roberson 10938355f576SJeff Roberson if (zone->uz_ipers < UMA_BUCKET_SIZE) 1094a553d4b8SJeff Roberson zone->uz_count = zone->uz_ipers - 1; 10958355f576SJeff Roberson else 1096a553d4b8SJeff Roberson zone->uz_count = UMA_BUCKET_SIZE - 1; 1097a553d4b8SJeff Roberson 1098a553d4b8SJeff Roberson for (cpu = 0; cpu < maxcpu; cpu++) 109928bc4419SJeff Roberson CPU_LOCK_INIT(zone, cpu, privlc); 11008355f576SJeff Roberson } 11018355f576SJeff Roberson 11028355f576SJeff Roberson /* 11039c2cd7e5SJeff Roberson * Zone header dtor. This frees all data, destroys locks, frees the hash table 11049c2cd7e5SJeff Roberson * and removes the zone from the global list. 11059c2cd7e5SJeff Roberson * 11069c2cd7e5SJeff Roberson * Arguments/Returns follow uma_dtor specifications 11079c2cd7e5SJeff Roberson * udata unused 11089c2cd7e5SJeff Roberson */ 11099c2cd7e5SJeff Roberson 11109c2cd7e5SJeff Roberson static void 11119c2cd7e5SJeff Roberson zone_dtor(void *arg, int size, void *udata) 11129c2cd7e5SJeff Roberson { 11139c2cd7e5SJeff Roberson uma_zone_t zone; 11149c2cd7e5SJeff Roberson int cpu; 11159c2cd7e5SJeff Roberson 11169c2cd7e5SJeff Roberson zone = (uma_zone_t)arg; 11179c2cd7e5SJeff Roberson 11189c2cd7e5SJeff Roberson mtx_lock(&uma_mtx); 11199c2cd7e5SJeff Roberson LIST_REMOVE(zone, uz_link); 11209c2cd7e5SJeff Roberson mtx_unlock(&uma_mtx); 11219c2cd7e5SJeff Roberson 11229c2cd7e5SJeff Roberson ZONE_LOCK(zone); 11239c2cd7e5SJeff Roberson zone->uz_wssize = 0; 11249c2cd7e5SJeff Roberson ZONE_UNLOCK(zone); 11259c2cd7e5SJeff Roberson 11269c2cd7e5SJeff Roberson zone_drain(zone); 11279c2cd7e5SJeff Roberson ZONE_LOCK(zone); 11289c2cd7e5SJeff Roberson if (zone->uz_free != 0) 11299c2cd7e5SJeff Roberson printf("Zone %s was not empty. Lost %d pages of memory.\n", 11309c2cd7e5SJeff Roberson zone->uz_name, zone->uz_pages); 11319c2cd7e5SJeff Roberson 11329c2cd7e5SJeff Roberson if ((zone->uz_flags & UMA_ZFLAG_INTERNAL) != 0) 11339c2cd7e5SJeff Roberson for (cpu = 0; cpu < maxcpu; cpu++) 11349c2cd7e5SJeff Roberson CPU_LOCK_FINI(zone, cpu); 11359c2cd7e5SJeff Roberson 11369c2cd7e5SJeff Roberson ZONE_UNLOCK(zone); 11370aef6126SJeff Roberson if ((zone->uz_flags & UMA_ZFLAG_OFFPAGE) != 0) 11380aef6126SJeff Roberson hash_free(&zone->uz_hash); 11390aef6126SJeff Roberson 11409c2cd7e5SJeff Roberson ZONE_LOCK_FINI(zone); 11419c2cd7e5SJeff Roberson } 11429c2cd7e5SJeff Roberson /* 11438355f576SJeff Roberson * Traverses every zone in the system and calls a callback 11448355f576SJeff Roberson * 11458355f576SJeff Roberson * Arguments: 11468355f576SJeff Roberson * zfunc A pointer to a function which accepts a zone 11478355f576SJeff Roberson * as an argument. 11488355f576SJeff Roberson * 11498355f576SJeff Roberson * Returns: 11508355f576SJeff Roberson * Nothing 11518355f576SJeff Roberson */ 11528355f576SJeff Roberson static void 11538355f576SJeff Roberson zone_foreach(void (*zfunc)(uma_zone_t)) 11548355f576SJeff Roberson { 11558355f576SJeff Roberson uma_zone_t zone; 11568355f576SJeff Roberson 11578355f576SJeff Roberson mtx_lock(&uma_mtx); 11588355f576SJeff Roberson LIST_FOREACH(zone, &uma_zones, uz_link) { 11598355f576SJeff Roberson zfunc(zone); 11608355f576SJeff Roberson } 11618355f576SJeff Roberson mtx_unlock(&uma_mtx); 11628355f576SJeff Roberson } 11638355f576SJeff Roberson 11648355f576SJeff Roberson /* Public functions */ 11658355f576SJeff Roberson /* See uma.h */ 11668355f576SJeff Roberson void 11678355f576SJeff Roberson uma_startup(void *bootmem) 11688355f576SJeff Roberson { 11698355f576SJeff Roberson struct uma_zctor_args args; 11708355f576SJeff Roberson uma_slab_t slab; 11718355f576SJeff Roberson int slabsize; 11728355f576SJeff Roberson int i; 11738355f576SJeff Roberson 11748355f576SJeff Roberson #ifdef UMA_DEBUG 11758355f576SJeff Roberson printf("Creating uma zone headers zone.\n"); 11768355f576SJeff Roberson #endif 11778355f576SJeff Roberson #ifdef SMP 11788355f576SJeff Roberson maxcpu = mp_maxid + 1; 11798355f576SJeff Roberson #else 11808355f576SJeff Roberson maxcpu = 1; 11818355f576SJeff Roberson #endif 11828355f576SJeff Roberson #ifdef UMA_DEBUG 11838355f576SJeff Roberson printf("Max cpu = %d, mp_maxid = %d\n", maxcpu, mp_maxid); 11848355f576SJeff Roberson Debugger("stop"); 11858355f576SJeff Roberson #endif 11866008862bSJohn Baldwin mtx_init(&uma_mtx, "UMA lock", NULL, MTX_DEF); 11878355f576SJeff Roberson /* "manually" Create the initial zone */ 11888355f576SJeff Roberson args.name = "UMA Zones"; 11898355f576SJeff Roberson args.size = sizeof(struct uma_zone) + 11908355f576SJeff Roberson (sizeof(struct uma_cache) * (maxcpu - 1)); 11918355f576SJeff Roberson args.ctor = zone_ctor; 11929c2cd7e5SJeff Roberson args.dtor = zone_dtor; 11938355f576SJeff Roberson args.uminit = zero_init; 11948355f576SJeff Roberson args.fini = NULL; 11958355f576SJeff Roberson args.align = 32 - 1; 11968355f576SJeff Roberson args.flags = UMA_ZONE_INTERNAL; 11978355f576SJeff Roberson /* The initial zone has no Per cpu queues so it's smaller */ 11988355f576SJeff Roberson zone_ctor(zones, sizeof(struct uma_zone), &args); 11998355f576SJeff Roberson 12008355f576SJeff Roberson #ifdef UMA_DEBUG 12018355f576SJeff Roberson printf("Filling boot free list.\n"); 12028355f576SJeff Roberson #endif 12038355f576SJeff Roberson for (i = 0; i < UMA_BOOT_PAGES; i++) { 12048355f576SJeff Roberson slab = (uma_slab_t)((u_int8_t *)bootmem + (i * UMA_SLAB_SIZE)); 12058355f576SJeff Roberson slab->us_data = (u_int8_t *)slab; 12068355f576SJeff Roberson slab->us_flags = UMA_SLAB_BOOT; 12078355f576SJeff Roberson LIST_INSERT_HEAD(&uma_boot_pages, slab, us_link); 12088355f576SJeff Roberson uma_boot_free++; 12098355f576SJeff Roberson } 12108355f576SJeff Roberson 12118355f576SJeff Roberson #ifdef UMA_DEBUG 12128355f576SJeff Roberson printf("Creating slab zone.\n"); 12138355f576SJeff Roberson #endif 12148355f576SJeff Roberson 12158355f576SJeff Roberson /* 12168355f576SJeff Roberson * This is the max number of free list items we'll have with 12178355f576SJeff Roberson * offpage slabs. 12188355f576SJeff Roberson */ 12198355f576SJeff Roberson 12208355f576SJeff Roberson slabsize = UMA_SLAB_SIZE - sizeof(struct uma_slab); 12218355f576SJeff Roberson slabsize /= UMA_MAX_WASTE; 12228355f576SJeff Roberson slabsize++; /* In case there it's rounded */ 12238355f576SJeff Roberson slabsize += sizeof(struct uma_slab); 12248355f576SJeff Roberson 12258355f576SJeff Roberson /* Now make a zone for slab headers */ 12268355f576SJeff Roberson slabzone = uma_zcreate("UMA Slabs", 12278355f576SJeff Roberson slabsize, 12288355f576SJeff Roberson NULL, NULL, NULL, NULL, 12298355f576SJeff Roberson UMA_ALIGN_PTR, UMA_ZONE_INTERNAL); 12308355f576SJeff Roberson 12318355f576SJeff Roberson hashzone = uma_zcreate("UMA Hash", 12328355f576SJeff Roberson sizeof(struct slabhead *) * UMA_HASH_SIZE_INIT, 12338355f576SJeff Roberson NULL, NULL, NULL, NULL, 12348355f576SJeff Roberson UMA_ALIGN_PTR, UMA_ZONE_INTERNAL); 12358355f576SJeff Roberson 12368355f576SJeff Roberson bucketzone = uma_zcreate("UMA Buckets", sizeof(struct uma_bucket), 12378355f576SJeff Roberson NULL, NULL, NULL, NULL, 12388355f576SJeff Roberson UMA_ALIGN_PTR, UMA_ZONE_INTERNAL); 12398355f576SJeff Roberson 12408355f576SJeff Roberson 12418355f576SJeff Roberson #ifdef UMA_DEBUG 12428355f576SJeff Roberson printf("UMA startup complete.\n"); 12438355f576SJeff Roberson #endif 12448355f576SJeff Roberson } 12458355f576SJeff Roberson 12468355f576SJeff Roberson /* see uma.h */ 12478355f576SJeff Roberson void 12488355f576SJeff Roberson uma_startup2(void *hashmem, u_long elems) 12498355f576SJeff Roberson { 12508355f576SJeff Roberson bzero(hashmem, elems * sizeof(void *)); 12518355f576SJeff Roberson mallochash->uh_slab_hash = hashmem; 12528355f576SJeff Roberson mallochash->uh_hashsize = elems; 12538355f576SJeff Roberson mallochash->uh_hashmask = elems - 1; 12548355f576SJeff Roberson booted = 1; 125586bbae32SJeff Roberson bucket_enable(); 12568355f576SJeff Roberson #ifdef UMA_DEBUG 12578355f576SJeff Roberson printf("UMA startup2 complete.\n"); 12588355f576SJeff Roberson #endif 12598355f576SJeff Roberson } 12608355f576SJeff Roberson 12618355f576SJeff Roberson /* 12628355f576SJeff Roberson * Initialize our callout handle 12638355f576SJeff Roberson * 12648355f576SJeff Roberson */ 12658355f576SJeff Roberson 12668355f576SJeff Roberson static void 12678355f576SJeff Roberson uma_startup3(void) 12688355f576SJeff Roberson { 12698355f576SJeff Roberson #ifdef UMA_DEBUG 12708355f576SJeff Roberson printf("Starting callout.\n"); 12718355f576SJeff Roberson #endif 12728355f576SJeff Roberson callout_init(&uma_callout, 0); 12738355f576SJeff Roberson callout_reset(&uma_callout, UMA_WORKING_TIME * hz, uma_timeout, NULL); 12748355f576SJeff Roberson #ifdef UMA_DEBUG 12758355f576SJeff Roberson printf("UMA startup3 complete.\n"); 12768355f576SJeff Roberson #endif 12778355f576SJeff Roberson } 12788355f576SJeff Roberson 12798355f576SJeff Roberson /* See uma.h */ 12808355f576SJeff Roberson uma_zone_t 1281c3bdc05fSAndrew R. Reiter uma_zcreate(char *name, size_t size, uma_ctor ctor, uma_dtor dtor, 1282c3bdc05fSAndrew R. Reiter uma_init uminit, uma_fini fini, int align, u_int16_t flags) 12838355f576SJeff Roberson 12848355f576SJeff Roberson { 12858355f576SJeff Roberson struct uma_zctor_args args; 12868355f576SJeff Roberson 12878355f576SJeff Roberson /* This stuff is essential for the zone ctor */ 12888355f576SJeff Roberson args.name = name; 12898355f576SJeff Roberson args.size = size; 12908355f576SJeff Roberson args.ctor = ctor; 12918355f576SJeff Roberson args.dtor = dtor; 12928355f576SJeff Roberson args.uminit = uminit; 12938355f576SJeff Roberson args.fini = fini; 12948355f576SJeff Roberson args.align = align; 12958355f576SJeff Roberson args.flags = flags; 12968355f576SJeff Roberson 1297a553d4b8SJeff Roberson return (uma_zalloc_internal(zones, &args, M_WAITOK, NULL)); 12988355f576SJeff Roberson } 12998355f576SJeff Roberson 13008355f576SJeff Roberson /* See uma.h */ 13019c2cd7e5SJeff Roberson void 13029c2cd7e5SJeff Roberson uma_zdestroy(uma_zone_t zone) 13039c2cd7e5SJeff Roberson { 13049c2cd7e5SJeff Roberson uma_zfree_internal(zones, zone, NULL, 0); 13059c2cd7e5SJeff Roberson } 13069c2cd7e5SJeff Roberson 13079c2cd7e5SJeff Roberson /* See uma.h */ 13088355f576SJeff Roberson void * 13092cc35ff9SJeff Roberson uma_zalloc_arg(uma_zone_t zone, void *udata, int flags) 13108355f576SJeff Roberson { 13118355f576SJeff Roberson void *item; 13128355f576SJeff Roberson uma_cache_t cache; 13138355f576SJeff Roberson uma_bucket_t bucket; 13148355f576SJeff Roberson int cpu; 13158355f576SJeff Roberson 13168355f576SJeff Roberson /* This is the fast path allocation */ 13178355f576SJeff Roberson #ifdef UMA_DEBUG_ALLOC_1 13188355f576SJeff Roberson printf("Allocating one item from %s(%p)\n", zone->uz_name, zone); 13198355f576SJeff Roberson #endif 1320a553d4b8SJeff Roberson 13214c1cc01cSJohn Baldwin if (!(flags & M_NOWAIT)) { 13224c1cc01cSJohn Baldwin KASSERT(curthread->td_intr_nesting_level == 0, 13234c1cc01cSJohn Baldwin ("malloc(M_WAITOK) in interrupt context")); 13244c1cc01cSJohn Baldwin WITNESS_SLEEP(1, NULL); 13254c1cc01cSJohn Baldwin } 13264c1cc01cSJohn Baldwin 1327a553d4b8SJeff Roberson zalloc_restart: 13288355f576SJeff Roberson cpu = PCPU_GET(cpuid); 13298355f576SJeff Roberson CPU_LOCK(zone, cpu); 13308355f576SJeff Roberson cache = &zone->uz_cpu[cpu]; 13318355f576SJeff Roberson 13328355f576SJeff Roberson zalloc_start: 13338355f576SJeff Roberson bucket = cache->uc_allocbucket; 13348355f576SJeff Roberson 13358355f576SJeff Roberson if (bucket) { 13368355f576SJeff Roberson if (bucket->ub_ptr > -1) { 13378355f576SJeff Roberson item = bucket->ub_bucket[bucket->ub_ptr]; 13388355f576SJeff Roberson #ifdef INVARIANTS 13398355f576SJeff Roberson bucket->ub_bucket[bucket->ub_ptr] = NULL; 13408355f576SJeff Roberson #endif 13418355f576SJeff Roberson bucket->ub_ptr--; 13428355f576SJeff Roberson KASSERT(item != NULL, 13438355f576SJeff Roberson ("uma_zalloc: Bucket pointer mangled.")); 13448355f576SJeff Roberson cache->uc_allocs++; 1345639c9550SJeff Roberson #ifdef INVARIANTS 1346639c9550SJeff Roberson uma_dbg_alloc(zone, NULL, item); 1347639c9550SJeff Roberson #endif 1348b9ba8931SJeff Roberson CPU_UNLOCK(zone, cpu); 13498355f576SJeff Roberson if (zone->uz_ctor) 13508355f576SJeff Roberson zone->uz_ctor(item, zone->uz_size, udata); 13512cc35ff9SJeff Roberson if (flags & M_ZERO) 13522cc35ff9SJeff Roberson bzero(item, zone->uz_size); 13538355f576SJeff Roberson return (item); 13548355f576SJeff Roberson } else if (cache->uc_freebucket) { 13558355f576SJeff Roberson /* 13568355f576SJeff Roberson * We have run out of items in our allocbucket. 13578355f576SJeff Roberson * See if we can switch with our free bucket. 13588355f576SJeff Roberson */ 13598355f576SJeff Roberson if (cache->uc_freebucket->ub_ptr > -1) { 13608355f576SJeff Roberson uma_bucket_t swap; 13618355f576SJeff Roberson 13628355f576SJeff Roberson #ifdef UMA_DEBUG_ALLOC 13638355f576SJeff Roberson printf("uma_zalloc: Swapping empty with alloc.\n"); 13648355f576SJeff Roberson #endif 13658355f576SJeff Roberson swap = cache->uc_freebucket; 13668355f576SJeff Roberson cache->uc_freebucket = cache->uc_allocbucket; 13678355f576SJeff Roberson cache->uc_allocbucket = swap; 13688355f576SJeff Roberson 13698355f576SJeff Roberson goto zalloc_start; 13708355f576SJeff Roberson } 13718355f576SJeff Roberson } 13728355f576SJeff Roberson } 1373a553d4b8SJeff Roberson ZONE_LOCK(zone); 1374a553d4b8SJeff Roberson /* Since we have locked the zone we may as well send back our stats */ 1375a553d4b8SJeff Roberson zone->uz_allocs += cache->uc_allocs; 1376a553d4b8SJeff Roberson cache->uc_allocs = 0; 13778355f576SJeff Roberson 1378a553d4b8SJeff Roberson /* Our old one is now a free bucket */ 1379a553d4b8SJeff Roberson if (cache->uc_allocbucket) { 1380a553d4b8SJeff Roberson KASSERT(cache->uc_allocbucket->ub_ptr == -1, 1381a553d4b8SJeff Roberson ("uma_zalloc_arg: Freeing a non free bucket.")); 1382a553d4b8SJeff Roberson LIST_INSERT_HEAD(&zone->uz_free_bucket, 1383a553d4b8SJeff Roberson cache->uc_allocbucket, ub_link); 1384a553d4b8SJeff Roberson cache->uc_allocbucket = NULL; 1385a553d4b8SJeff Roberson } 13868355f576SJeff Roberson 1387a553d4b8SJeff Roberson /* Check the free list for a new alloc bucket */ 1388a553d4b8SJeff Roberson if ((bucket = LIST_FIRST(&zone->uz_full_bucket)) != NULL) { 1389a553d4b8SJeff Roberson KASSERT(bucket->ub_ptr != -1, 1390a553d4b8SJeff Roberson ("uma_zalloc_arg: Returning an empty bucket.")); 13918355f576SJeff Roberson 1392a553d4b8SJeff Roberson LIST_REMOVE(bucket, ub_link); 1393a553d4b8SJeff Roberson cache->uc_allocbucket = bucket; 1394a553d4b8SJeff Roberson ZONE_UNLOCK(zone); 13958355f576SJeff Roberson goto zalloc_start; 1396a553d4b8SJeff Roberson } 1397a553d4b8SJeff Roberson /* Bump up our uz_count so we get here less */ 1398a553d4b8SJeff Roberson if (zone->uz_count < UMA_BUCKET_SIZE - 1) 1399a553d4b8SJeff Roberson zone->uz_count++; 1400a553d4b8SJeff Roberson 1401a553d4b8SJeff Roberson /* We are no longer associated with this cpu!!! */ 1402a553d4b8SJeff Roberson CPU_UNLOCK(zone, cpu); 14038355f576SJeff Roberson 14048355f576SJeff Roberson /* 1405a553d4b8SJeff Roberson * Now lets just fill a bucket and put it on the free list. If that 1406a553d4b8SJeff Roberson * works we'll restart the allocation from the begining. 1407a553d4b8SJeff Roberson * 1408a553d4b8SJeff Roberson * Try this zone's free list first so we don't allocate extra buckets. 14098355f576SJeff Roberson */ 1410a553d4b8SJeff Roberson 1411a553d4b8SJeff Roberson if ((bucket = LIST_FIRST(&zone->uz_free_bucket)) != NULL) 1412a553d4b8SJeff Roberson LIST_REMOVE(bucket, ub_link); 1413a553d4b8SJeff Roberson 1414a553d4b8SJeff Roberson /* Now we no longer need the zone lock. */ 1415a553d4b8SJeff Roberson ZONE_UNLOCK(zone); 1416a553d4b8SJeff Roberson 1417a553d4b8SJeff Roberson if (bucket == NULL) 1418a553d4b8SJeff Roberson bucket = uma_zalloc_internal(bucketzone, 14192cc35ff9SJeff Roberson NULL, flags, NULL); 1420a553d4b8SJeff Roberson 1421a553d4b8SJeff Roberson if (bucket != NULL) { 1422a553d4b8SJeff Roberson #ifdef INVARIANTS 1423a553d4b8SJeff Roberson bzero(bucket, bucketzone->uz_size); 1424a553d4b8SJeff Roberson #endif 1425a553d4b8SJeff Roberson bucket->ub_ptr = -1; 1426a553d4b8SJeff Roberson 14272cc35ff9SJeff Roberson if (uma_zalloc_internal(zone, udata, flags, bucket)) 1428a553d4b8SJeff Roberson goto zalloc_restart; 1429a553d4b8SJeff Roberson else 1430a553d4b8SJeff Roberson uma_zfree_internal(bucketzone, bucket, NULL, 0); 1431a553d4b8SJeff Roberson } 1432a553d4b8SJeff Roberson /* 1433a553d4b8SJeff Roberson * We may not get a bucket if we recurse, so 1434a553d4b8SJeff Roberson * return an actual item. 1435a553d4b8SJeff Roberson */ 1436a553d4b8SJeff Roberson #ifdef UMA_DEBUG 1437a553d4b8SJeff Roberson printf("uma_zalloc_arg: Bucketzone returned NULL\n"); 1438a553d4b8SJeff Roberson #endif 1439a553d4b8SJeff Roberson 14402cc35ff9SJeff Roberson return (uma_zalloc_internal(zone, udata, flags, NULL)); 14418355f576SJeff Roberson } 14428355f576SJeff Roberson 14438355f576SJeff Roberson /* 14448355f576SJeff Roberson * Allocates an item for an internal zone OR fills a bucket 14458355f576SJeff Roberson * 14468355f576SJeff Roberson * Arguments 14478355f576SJeff Roberson * zone The zone to alloc for. 14488355f576SJeff Roberson * udata The data to be passed to the constructor. 14492cc35ff9SJeff Roberson * flags M_WAITOK, M_NOWAIT, M_ZERO. 1450a553d4b8SJeff Roberson * bucket The bucket to fill or NULL 14518355f576SJeff Roberson * 14528355f576SJeff Roberson * Returns 14538355f576SJeff Roberson * NULL if there is no memory and M_NOWAIT is set 14548355f576SJeff Roberson * An item if called on an interal zone 14558355f576SJeff Roberson * Non NULL if called to fill a bucket and it was successful. 14568355f576SJeff Roberson * 14578355f576SJeff Roberson * Discussion: 14588355f576SJeff Roberson * This was much cleaner before it had to do per cpu caches. It is 14598355f576SJeff Roberson * complicated now because it has to handle the simple internal case, and 1460a553d4b8SJeff Roberson * the more involved bucket filling and allocation. 14618355f576SJeff Roberson */ 14628355f576SJeff Roberson 14638355f576SJeff Roberson static void * 14642cc35ff9SJeff Roberson uma_zalloc_internal(uma_zone_t zone, void *udata, int flags, uma_bucket_t bucket) 14658355f576SJeff Roberson { 14668355f576SJeff Roberson uma_slab_t slab; 14678355f576SJeff Roberson u_int8_t freei; 14688355f576SJeff Roberson void *item; 14698355f576SJeff Roberson 14708355f576SJeff Roberson item = NULL; 14718355f576SJeff Roberson 14728355f576SJeff Roberson /* 1473a553d4b8SJeff Roberson * This is to stop us from allocating per cpu buckets while we're 1474a553d4b8SJeff Roberson * running out of UMA_BOOT_PAGES. Otherwise, we would exhaust the 1475a553d4b8SJeff Roberson * boot pages. 14768355f576SJeff Roberson */ 14778355f576SJeff Roberson 147886bbae32SJeff Roberson if (bucketdisable && zone == bucketzone) 14798355f576SJeff Roberson return (NULL); 14808355f576SJeff Roberson 14818355f576SJeff Roberson #ifdef UMA_DEBUG_ALLOC 14828355f576SJeff Roberson printf("INTERNAL: Allocating one item from %s(%p)\n", zone->uz_name, zone); 14838355f576SJeff Roberson #endif 14848355f576SJeff Roberson ZONE_LOCK(zone); 14858355f576SJeff Roberson 14868355f576SJeff Roberson /* 1487a553d4b8SJeff Roberson * This code is here to limit the number of simultaneous bucket fills 1488a553d4b8SJeff Roberson * for any given zone to the number of per cpu caches in this zone. This 1489a553d4b8SJeff Roberson * is done so that we don't allocate more memory than we really need. 14908355f576SJeff Roberson */ 1491a553d4b8SJeff Roberson 1492a553d4b8SJeff Roberson if (bucket) { 1493a553d4b8SJeff Roberson #ifdef SMP 1494bce97791SJeff Roberson if (zone->uz_fills >= mp_ncpus) { 1495a553d4b8SJeff Roberson #else 1496bce97791SJeff Roberson if (zone->uz_fills > 1) { 14978355f576SJeff Roberson #endif 1498bce97791SJeff Roberson ZONE_UNLOCK(zone); 1499a553d4b8SJeff Roberson return (NULL); 1500bce97791SJeff Roberson } 1501a553d4b8SJeff Roberson 1502a553d4b8SJeff Roberson zone->uz_fills++; 15038355f576SJeff Roberson } 15048355f576SJeff Roberson 15058355f576SJeff Roberson new_slab: 15068355f576SJeff Roberson 15078355f576SJeff Roberson /* Find a slab with some space */ 15088355f576SJeff Roberson if (zone->uz_free) { 15098355f576SJeff Roberson if (!LIST_EMPTY(&zone->uz_part_slab)) { 15108355f576SJeff Roberson slab = LIST_FIRST(&zone->uz_part_slab); 15118355f576SJeff Roberson } else { 15128355f576SJeff Roberson slab = LIST_FIRST(&zone->uz_free_slab); 15138355f576SJeff Roberson LIST_REMOVE(slab, us_link); 15148355f576SJeff Roberson LIST_INSERT_HEAD(&zone->uz_part_slab, slab, us_link); 15158355f576SJeff Roberson } 15168355f576SJeff Roberson } else { 15178355f576SJeff Roberson /* 15188355f576SJeff Roberson * This is to prevent us from recursively trying to allocate 15198355f576SJeff Roberson * buckets. The problem is that if an allocation forces us to 15208355f576SJeff Roberson * grab a new bucket we will call page_alloc, which will go off 15218355f576SJeff Roberson * and cause the vm to allocate vm_map_entries. If we need new 15228355f576SJeff Roberson * buckets there too we will recurse in kmem_alloc and bad 15238355f576SJeff Roberson * things happen. So instead we return a NULL bucket, and make 15248355f576SJeff Roberson * the code that allocates buckets smart enough to deal with it */ 15258355f576SJeff Roberson if (zone == bucketzone && zone->uz_recurse != 0) { 15268355f576SJeff Roberson ZONE_UNLOCK(zone); 15278355f576SJeff Roberson return (NULL); 15288355f576SJeff Roberson } 1529af7f9b97SJeff Roberson while (zone->uz_maxpages && 1530af7f9b97SJeff Roberson zone->uz_pages >= zone->uz_maxpages) { 1531af7f9b97SJeff Roberson zone->uz_flags |= UMA_ZFLAG_FULL; 1532af7f9b97SJeff Roberson 15332cc35ff9SJeff Roberson if (flags & M_WAITOK) 1534af7f9b97SJeff Roberson msleep(zone, &zone->uz_lock, PVM, "zonelimit", 0); 1535af7f9b97SJeff Roberson else 1536af7f9b97SJeff Roberson goto alloc_fail; 1537af7f9b97SJeff Roberson 1538af7f9b97SJeff Roberson goto new_slab; 1539af7f9b97SJeff Roberson } 1540af7f9b97SJeff Roberson 15418355f576SJeff Roberson zone->uz_recurse++; 15422cc35ff9SJeff Roberson slab = slab_zalloc(zone, flags); 15438355f576SJeff Roberson zone->uz_recurse--; 15448355f576SJeff Roberson /* 1545af7f9b97SJeff Roberson * We might not have been able to get a slab but another cpu 1546af7f9b97SJeff Roberson * could have while we were unlocked. If we did get a slab put 1547af7f9b97SJeff Roberson * it on the partially used slab list. If not check the free 1548af7f9b97SJeff Roberson * count and restart or fail accordingly. 15498355f576SJeff Roberson */ 1550af7f9b97SJeff Roberson if (slab) 1551af7f9b97SJeff Roberson LIST_INSERT_HEAD(&zone->uz_part_slab, slab, us_link); 1552af7f9b97SJeff Roberson else if (zone->uz_free == 0) 1553af7f9b97SJeff Roberson goto alloc_fail; 1554a553d4b8SJeff Roberson else 1555af7f9b97SJeff Roberson goto new_slab; 15568355f576SJeff Roberson } 1557a553d4b8SJeff Roberson /* 1558a553d4b8SJeff Roberson * If this is our first time though put this guy on the list. 1559a553d4b8SJeff Roberson */ 1560a553d4b8SJeff Roberson if (bucket != NULL && bucket->ub_ptr == -1) 1561a553d4b8SJeff Roberson LIST_INSERT_HEAD(&zone->uz_full_bucket, 1562a553d4b8SJeff Roberson bucket, ub_link); 1563a553d4b8SJeff Roberson 15648355f576SJeff Roberson 15658355f576SJeff Roberson while (slab->us_freecount) { 15668355f576SJeff Roberson freei = slab->us_firstfree; 15678355f576SJeff Roberson slab->us_firstfree = slab->us_freelist[freei]; 1568639c9550SJeff Roberson 15698355f576SJeff Roberson item = slab->us_data + (zone->uz_rsize * freei); 15708355f576SJeff Roberson 1571639c9550SJeff Roberson slab->us_freecount--; 1572639c9550SJeff Roberson zone->uz_free--; 1573639c9550SJeff Roberson #ifdef INVARIANTS 1574639c9550SJeff Roberson uma_dbg_alloc(zone, slab, item); 1575639c9550SJeff Roberson #endif 1576a553d4b8SJeff Roberson if (bucket == NULL) { 15778355f576SJeff Roberson zone->uz_allocs++; 15788355f576SJeff Roberson break; 15798355f576SJeff Roberson } 15808355f576SJeff Roberson bucket->ub_bucket[++bucket->ub_ptr] = item; 15818355f576SJeff Roberson 15828355f576SJeff Roberson /* Don't overfill the bucket! */ 1583a553d4b8SJeff Roberson if (bucket->ub_ptr == zone->uz_count) 15848355f576SJeff Roberson break; 15858355f576SJeff Roberson } 15868355f576SJeff Roberson 15878355f576SJeff Roberson /* Move this slab to the full list */ 15888355f576SJeff Roberson if (slab->us_freecount == 0) { 15898355f576SJeff Roberson LIST_REMOVE(slab, us_link); 15908355f576SJeff Roberson LIST_INSERT_HEAD(&zone->uz_full_slab, slab, us_link); 15918355f576SJeff Roberson } 15928355f576SJeff Roberson 1593a553d4b8SJeff Roberson if (bucket != NULL) { 15948355f576SJeff Roberson /* Try to keep the buckets totally full, but don't block */ 1595a553d4b8SJeff Roberson if (bucket->ub_ptr < zone->uz_count) { 15962cc35ff9SJeff Roberson flags |= M_NOWAIT; 15972cc35ff9SJeff Roberson flags &= ~M_WAITOK; 15988355f576SJeff Roberson goto new_slab; 1599a553d4b8SJeff Roberson } else 1600a553d4b8SJeff Roberson zone->uz_fills--; 16018355f576SJeff Roberson } 16028355f576SJeff Roberson 16038355f576SJeff Roberson ZONE_UNLOCK(zone); 16048355f576SJeff Roberson 16058355f576SJeff Roberson /* Only construct at this time if we're not filling a bucket */ 16062cc35ff9SJeff Roberson if (bucket == NULL && zone->uz_ctor != NULL) { 16078355f576SJeff Roberson zone->uz_ctor(item, zone->uz_size, udata); 16082cc35ff9SJeff Roberson if (flags & M_ZERO) 16092cc35ff9SJeff Roberson bzero(item, zone->uz_size); 16102cc35ff9SJeff Roberson } 16118355f576SJeff Roberson 16128355f576SJeff Roberson return (item); 1613af7f9b97SJeff Roberson 1614af7f9b97SJeff Roberson alloc_fail: 1615af7f9b97SJeff Roberson if (bucket != NULL) 1616af7f9b97SJeff Roberson zone->uz_fills--; 1617af7f9b97SJeff Roberson ZONE_UNLOCK(zone); 1618af7f9b97SJeff Roberson 1619af7f9b97SJeff Roberson if (bucket != NULL && bucket->ub_ptr != -1) 1620af7f9b97SJeff Roberson return (bucket); 1621af7f9b97SJeff Roberson 1622af7f9b97SJeff Roberson return (NULL); 16238355f576SJeff Roberson } 16248355f576SJeff Roberson 16258355f576SJeff Roberson /* See uma.h */ 16268355f576SJeff Roberson void 16278355f576SJeff Roberson uma_zfree_arg(uma_zone_t zone, void *item, void *udata) 16288355f576SJeff Roberson { 16298355f576SJeff Roberson uma_cache_t cache; 16308355f576SJeff Roberson uma_bucket_t bucket; 16318355f576SJeff Roberson int cpu; 16328355f576SJeff Roberson 16338355f576SJeff Roberson /* This is the fast path free */ 16348355f576SJeff Roberson #ifdef UMA_DEBUG_ALLOC_1 16358355f576SJeff Roberson printf("Freeing item %p to %s(%p)\n", item, zone->uz_name, zone); 16368355f576SJeff Roberson #endif 1637af7f9b97SJeff Roberson /* 1638af7f9b97SJeff Roberson * The race here is acceptable. If we miss it we'll just have to wait 1639af7f9b97SJeff Roberson * a little longer for the limits to be reset. 1640af7f9b97SJeff Roberson */ 1641af7f9b97SJeff Roberson 1642af7f9b97SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_FULL) 1643af7f9b97SJeff Roberson goto zfree_internal; 1644af7f9b97SJeff Roberson 1645a553d4b8SJeff Roberson zfree_restart: 16468355f576SJeff Roberson cpu = PCPU_GET(cpuid); 16478355f576SJeff Roberson CPU_LOCK(zone, cpu); 16488355f576SJeff Roberson cache = &zone->uz_cpu[cpu]; 16498355f576SJeff Roberson 16508355f576SJeff Roberson zfree_start: 16518355f576SJeff Roberson bucket = cache->uc_freebucket; 16528355f576SJeff Roberson 16538355f576SJeff Roberson if (bucket) { 1654a553d4b8SJeff Roberson /* 1655a553d4b8SJeff Roberson * Do we have room in our bucket? It is OK for this uz count 1656a553d4b8SJeff Roberson * check to be slightly out of sync. 1657a553d4b8SJeff Roberson */ 1658a553d4b8SJeff Roberson 1659a553d4b8SJeff Roberson if (bucket->ub_ptr < zone->uz_count) { 16608355f576SJeff Roberson bucket->ub_ptr++; 16618355f576SJeff Roberson KASSERT(bucket->ub_bucket[bucket->ub_ptr] == NULL, 16628355f576SJeff Roberson ("uma_zfree: Freeing to non free bucket index.")); 16638355f576SJeff Roberson bucket->ub_bucket[bucket->ub_ptr] = item; 16648355f576SJeff Roberson if (zone->uz_dtor) 16658355f576SJeff Roberson zone->uz_dtor(item, zone->uz_size, udata); 1666b9ba8931SJeff Roberson #ifdef INVARIANTS 1667b9ba8931SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_MALLOC) 1668b9ba8931SJeff Roberson uma_dbg_free(zone, udata, item); 1669b9ba8931SJeff Roberson else 1670b9ba8931SJeff Roberson uma_dbg_free(zone, NULL, item); 1671b9ba8931SJeff Roberson #endif 1672605cbd6aSJeff Roberson CPU_UNLOCK(zone, cpu); 16738355f576SJeff Roberson return; 16748355f576SJeff Roberson } else if (cache->uc_allocbucket) { 16758355f576SJeff Roberson #ifdef UMA_DEBUG_ALLOC 16768355f576SJeff Roberson printf("uma_zfree: Swapping buckets.\n"); 16778355f576SJeff Roberson #endif 16788355f576SJeff Roberson /* 16798355f576SJeff Roberson * We have run out of space in our freebucket. 16808355f576SJeff Roberson * See if we can switch with our alloc bucket. 16818355f576SJeff Roberson */ 16828355f576SJeff Roberson if (cache->uc_allocbucket->ub_ptr < 16838355f576SJeff Roberson cache->uc_freebucket->ub_ptr) { 16848355f576SJeff Roberson uma_bucket_t swap; 16858355f576SJeff Roberson 16868355f576SJeff Roberson swap = cache->uc_freebucket; 16878355f576SJeff Roberson cache->uc_freebucket = cache->uc_allocbucket; 16888355f576SJeff Roberson cache->uc_allocbucket = swap; 16898355f576SJeff Roberson 16908355f576SJeff Roberson goto zfree_start; 16918355f576SJeff Roberson } 16928355f576SJeff Roberson } 16938355f576SJeff Roberson } 16948355f576SJeff Roberson 16958355f576SJeff Roberson /* 1696a553d4b8SJeff Roberson * We can get here for two reasons: 16978355f576SJeff Roberson * 16988355f576SJeff Roberson * 1) The buckets are NULL 1699a553d4b8SJeff Roberson * 2) The alloc and free buckets are both somewhat full. 17008355f576SJeff Roberson * 17018355f576SJeff Roberson */ 17028355f576SJeff Roberson 17038355f576SJeff Roberson ZONE_LOCK(zone); 17048355f576SJeff Roberson 17058355f576SJeff Roberson bucket = cache->uc_freebucket; 17068355f576SJeff Roberson cache->uc_freebucket = NULL; 17078355f576SJeff Roberson 17088355f576SJeff Roberson /* Can we throw this on the zone full list? */ 17098355f576SJeff Roberson if (bucket != NULL) { 17108355f576SJeff Roberson #ifdef UMA_DEBUG_ALLOC 17118355f576SJeff Roberson printf("uma_zfree: Putting old bucket on the free list.\n"); 17128355f576SJeff Roberson #endif 17138355f576SJeff Roberson /* ub_ptr is pointing to the last free item */ 17148355f576SJeff Roberson KASSERT(bucket->ub_ptr != -1, 17158355f576SJeff Roberson ("uma_zfree: Attempting to insert an empty bucket onto the full list.\n")); 17168355f576SJeff Roberson LIST_INSERT_HEAD(&zone->uz_full_bucket, 17178355f576SJeff Roberson bucket, ub_link); 17188355f576SJeff Roberson } 1719a553d4b8SJeff Roberson if ((bucket = LIST_FIRST(&zone->uz_free_bucket)) != NULL) { 1720a553d4b8SJeff Roberson LIST_REMOVE(bucket, ub_link); 1721a553d4b8SJeff Roberson ZONE_UNLOCK(zone); 1722a553d4b8SJeff Roberson cache->uc_freebucket = bucket; 1723a553d4b8SJeff Roberson goto zfree_start; 1724a553d4b8SJeff Roberson } 1725a553d4b8SJeff Roberson /* We're done with this CPU now */ 1726a553d4b8SJeff Roberson CPU_UNLOCK(zone, cpu); 1727a553d4b8SJeff Roberson 1728a553d4b8SJeff Roberson /* And the zone.. */ 1729a553d4b8SJeff Roberson ZONE_UNLOCK(zone); 1730a553d4b8SJeff Roberson 17318355f576SJeff Roberson #ifdef UMA_DEBUG_ALLOC 17328355f576SJeff Roberson printf("uma_zfree: Allocating new free bucket.\n"); 17338355f576SJeff Roberson #endif 17348355f576SJeff Roberson bucket = uma_zalloc_internal(bucketzone, 1735a553d4b8SJeff Roberson NULL, M_NOWAIT, NULL); 17368355f576SJeff Roberson if (bucket) { 17378355f576SJeff Roberson #ifdef INVARIANTS 17388355f576SJeff Roberson bzero(bucket, bucketzone->uz_size); 17398355f576SJeff Roberson #endif 17408355f576SJeff Roberson bucket->ub_ptr = -1; 1741a553d4b8SJeff Roberson ZONE_LOCK(zone); 1742a553d4b8SJeff Roberson LIST_INSERT_HEAD(&zone->uz_free_bucket, 1743a553d4b8SJeff Roberson bucket, ub_link); 17448355f576SJeff Roberson ZONE_UNLOCK(zone); 1745a553d4b8SJeff Roberson goto zfree_restart; 17468355f576SJeff Roberson } 17478355f576SJeff Roberson 1748a553d4b8SJeff Roberson /* 1749a553d4b8SJeff Roberson * If nothing else caught this, we'll just do an internal free. 1750a553d4b8SJeff Roberson */ 17518355f576SJeff Roberson 1752af7f9b97SJeff Roberson zfree_internal: 1753af7f9b97SJeff Roberson 17548355f576SJeff Roberson uma_zfree_internal(zone, item, udata, 0); 17558355f576SJeff Roberson 17568355f576SJeff Roberson return; 17578355f576SJeff Roberson 17588355f576SJeff Roberson } 17598355f576SJeff Roberson 17608355f576SJeff Roberson /* 17618355f576SJeff Roberson * Frees an item to an INTERNAL zone or allocates a free bucket 17628355f576SJeff Roberson * 17638355f576SJeff Roberson * Arguments: 17648355f576SJeff Roberson * zone The zone to free to 17658355f576SJeff Roberson * item The item we're freeing 17668355f576SJeff Roberson * udata User supplied data for the dtor 17678355f576SJeff Roberson * skip Skip the dtor, it was done in uma_zfree_arg 17688355f576SJeff Roberson */ 17698355f576SJeff Roberson 17708355f576SJeff Roberson static void 17718355f576SJeff Roberson uma_zfree_internal(uma_zone_t zone, void *item, void *udata, int skip) 17728355f576SJeff Roberson { 17738355f576SJeff Roberson uma_slab_t slab; 17748355f576SJeff Roberson u_int8_t *mem; 17758355f576SJeff Roberson u_int8_t freei; 17768355f576SJeff Roberson 17778355f576SJeff Roberson ZONE_LOCK(zone); 17788355f576SJeff Roberson 17798355f576SJeff Roberson if (!(zone->uz_flags & UMA_ZFLAG_MALLOC)) { 17808355f576SJeff Roberson mem = (u_int8_t *)((unsigned long)item & (~UMA_SLAB_MASK)); 17818355f576SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_OFFPAGE) 17828355f576SJeff Roberson slab = hash_sfind(&zone->uz_hash, mem); 17838355f576SJeff Roberson else { 17848355f576SJeff Roberson mem += zone->uz_pgoff; 17858355f576SJeff Roberson slab = (uma_slab_t)mem; 17868355f576SJeff Roberson } 17878355f576SJeff Roberson } else { 17888355f576SJeff Roberson slab = (uma_slab_t)udata; 17898355f576SJeff Roberson } 17908355f576SJeff Roberson 17918355f576SJeff Roberson /* Do we need to remove from any lists? */ 17928355f576SJeff Roberson if (slab->us_freecount+1 == zone->uz_ipers) { 17938355f576SJeff Roberson LIST_REMOVE(slab, us_link); 17948355f576SJeff Roberson LIST_INSERT_HEAD(&zone->uz_free_slab, slab, us_link); 17958355f576SJeff Roberson } else if (slab->us_freecount == 0) { 17968355f576SJeff Roberson LIST_REMOVE(slab, us_link); 17978355f576SJeff Roberson LIST_INSERT_HEAD(&zone->uz_part_slab, slab, us_link); 17988355f576SJeff Roberson } 17998355f576SJeff Roberson 18008355f576SJeff Roberson /* Slab management stuff */ 18018355f576SJeff Roberson freei = ((unsigned long)item - (unsigned long)slab->us_data) 18028355f576SJeff Roberson / zone->uz_rsize; 18038355f576SJeff Roberson 1804639c9550SJeff Roberson #ifdef INVARIANTS 1805639c9550SJeff Roberson if (!skip) 1806639c9550SJeff Roberson uma_dbg_free(zone, slab, item); 18078355f576SJeff Roberson #endif 1808639c9550SJeff Roberson 18098355f576SJeff Roberson slab->us_freelist[freei] = slab->us_firstfree; 18108355f576SJeff Roberson slab->us_firstfree = freei; 18118355f576SJeff Roberson slab->us_freecount++; 18128355f576SJeff Roberson 18138355f576SJeff Roberson /* Zone statistics */ 18148355f576SJeff Roberson zone->uz_free++; 18158355f576SJeff Roberson 18168355f576SJeff Roberson if (!skip && zone->uz_dtor) 18178355f576SJeff Roberson zone->uz_dtor(item, zone->uz_size, udata); 1818605cbd6aSJeff Roberson 1819af7f9b97SJeff Roberson if (zone->uz_flags & UMA_ZFLAG_FULL) { 1820af7f9b97SJeff Roberson if (zone->uz_pages < zone->uz_maxpages) 1821af7f9b97SJeff Roberson zone->uz_flags &= ~UMA_ZFLAG_FULL; 1822af7f9b97SJeff Roberson 1823af7f9b97SJeff Roberson /* We can handle one more allocation */ 1824af7f9b97SJeff Roberson wakeup_one(&zone); 1825af7f9b97SJeff Roberson } 1826af7f9b97SJeff Roberson 1827605cbd6aSJeff Roberson ZONE_UNLOCK(zone); 18288355f576SJeff Roberson } 18298355f576SJeff Roberson 18308355f576SJeff Roberson /* See uma.h */ 18318355f576SJeff Roberson void 1832736ee590SJeff Roberson uma_zone_set_max(uma_zone_t zone, int nitems) 1833736ee590SJeff Roberson { 1834736ee590SJeff Roberson ZONE_LOCK(zone); 1835736ee590SJeff Roberson if (zone->uz_ppera > 1) 1836af7f9b97SJeff Roberson zone->uz_maxpages = nitems * zone->uz_ppera; 1837736ee590SJeff Roberson else 1838736ee590SJeff Roberson zone->uz_maxpages = nitems / zone->uz_ipers; 183928bc4419SJeff Roberson 1840d4d6aee5SAndrew R. Reiter if (zone->uz_maxpages * zone->uz_ipers < nitems) 1841d4d6aee5SAndrew R. Reiter zone->uz_maxpages++; 184228bc4419SJeff Roberson 1843736ee590SJeff Roberson ZONE_UNLOCK(zone); 1844736ee590SJeff Roberson } 1845736ee590SJeff Roberson 1846736ee590SJeff Roberson /* See uma.h */ 1847736ee590SJeff Roberson void 18488355f576SJeff Roberson uma_zone_set_freef(uma_zone_t zone, uma_free freef) 18498355f576SJeff Roberson { 18508355f576SJeff Roberson ZONE_LOCK(zone); 18518355f576SJeff Roberson 18528355f576SJeff Roberson zone->uz_freef = freef; 18538355f576SJeff Roberson 18548355f576SJeff Roberson ZONE_UNLOCK(zone); 18558355f576SJeff Roberson } 18568355f576SJeff Roberson 18578355f576SJeff Roberson /* See uma.h */ 18588355f576SJeff Roberson void 18598355f576SJeff Roberson uma_zone_set_allocf(uma_zone_t zone, uma_alloc allocf) 18608355f576SJeff Roberson { 18618355f576SJeff Roberson ZONE_LOCK(zone); 18628355f576SJeff Roberson 18638355f576SJeff Roberson zone->uz_flags |= UMA_ZFLAG_PRIVALLOC; 18648355f576SJeff Roberson zone->uz_allocf = allocf; 18658355f576SJeff Roberson 18668355f576SJeff Roberson ZONE_UNLOCK(zone); 18678355f576SJeff Roberson } 18688355f576SJeff Roberson 18698355f576SJeff Roberson /* See uma.h */ 18708355f576SJeff Roberson int 18718355f576SJeff Roberson uma_zone_set_obj(uma_zone_t zone, struct vm_object *obj, int count) 18728355f576SJeff Roberson { 18738355f576SJeff Roberson int pages; 18748355f576SJeff Roberson vm_offset_t kva; 18758355f576SJeff Roberson 18768355f576SJeff Roberson mtx_lock(&Giant); 18778355f576SJeff Roberson 18788355f576SJeff Roberson pages = count / zone->uz_ipers; 18798355f576SJeff Roberson 18808355f576SJeff Roberson if (pages * zone->uz_ipers < count) 18818355f576SJeff Roberson pages++; 1882a553d4b8SJeff Roberson 18838355f576SJeff Roberson kva = kmem_alloc_pageable(kernel_map, pages * UMA_SLAB_SIZE); 18848355f576SJeff Roberson 1885a553d4b8SJeff Roberson if (kva == 0) { 1886a553d4b8SJeff Roberson mtx_unlock(&Giant); 18878355f576SJeff Roberson return (0); 18888355f576SJeff Roberson } 18898355f576SJeff Roberson 18908355f576SJeff Roberson 1891a553d4b8SJeff Roberson if (obj == NULL) 1892a553d4b8SJeff Roberson obj = vm_object_allocate(OBJT_DEFAULT, 1893c7173f58SJeff Roberson pages); 18948355f576SJeff Roberson else 18958355f576SJeff Roberson _vm_object_allocate(OBJT_DEFAULT, 1896c7173f58SJeff Roberson pages, obj); 1897a553d4b8SJeff Roberson 1898a553d4b8SJeff Roberson ZONE_LOCK(zone); 1899a553d4b8SJeff Roberson zone->uz_kva = kva; 1900a553d4b8SJeff Roberson zone->uz_obj = obj; 1901a553d4b8SJeff Roberson zone->uz_maxpages = pages; 19028355f576SJeff Roberson 19038355f576SJeff Roberson zone->uz_allocf = obj_alloc; 19048355f576SJeff Roberson zone->uz_flags |= UMA_ZFLAG_NOFREE | UMA_ZFLAG_PRIVALLOC; 19058355f576SJeff Roberson 19068355f576SJeff Roberson ZONE_UNLOCK(zone); 1907a553d4b8SJeff Roberson mtx_unlock(&Giant); 19088355f576SJeff Roberson 19098355f576SJeff Roberson return (1); 19108355f576SJeff Roberson } 19118355f576SJeff Roberson 19128355f576SJeff Roberson /* See uma.h */ 19138355f576SJeff Roberson void 19148355f576SJeff Roberson uma_prealloc(uma_zone_t zone, int items) 19158355f576SJeff Roberson { 19168355f576SJeff Roberson int slabs; 19178355f576SJeff Roberson uma_slab_t slab; 19188355f576SJeff Roberson 19198355f576SJeff Roberson ZONE_LOCK(zone); 19208355f576SJeff Roberson slabs = items / zone->uz_ipers; 19218355f576SJeff Roberson if (slabs * zone->uz_ipers < items) 19228355f576SJeff Roberson slabs++; 19238355f576SJeff Roberson 19248355f576SJeff Roberson while (slabs > 0) { 19258355f576SJeff Roberson slab = slab_zalloc(zone, M_WAITOK); 19268355f576SJeff Roberson LIST_INSERT_HEAD(&zone->uz_free_slab, slab, us_link); 19278355f576SJeff Roberson slabs--; 19288355f576SJeff Roberson } 19298355f576SJeff Roberson ZONE_UNLOCK(zone); 19308355f576SJeff Roberson } 19318355f576SJeff Roberson 19328355f576SJeff Roberson /* See uma.h */ 19338355f576SJeff Roberson void 19348355f576SJeff Roberson uma_reclaim(void) 19358355f576SJeff Roberson { 19368355f576SJeff Roberson /* 19378355f576SJeff Roberson * You might think that the delay below would improve performance since 19388355f576SJeff Roberson * the allocator will give away memory that it may ask for immediately. 19398355f576SJeff Roberson * Really, it makes things worse, since cpu cycles are so much cheaper 19408355f576SJeff Roberson * than disk activity. 19418355f576SJeff Roberson */ 19428355f576SJeff Roberson #if 0 19438355f576SJeff Roberson static struct timeval tv = {0}; 19448355f576SJeff Roberson struct timeval now; 19458355f576SJeff Roberson getmicrouptime(&now); 19468355f576SJeff Roberson if (now.tv_sec > tv.tv_sec + 30) 19478355f576SJeff Roberson tv = now; 19488355f576SJeff Roberson else 19498355f576SJeff Roberson return; 19508355f576SJeff Roberson #endif 19518355f576SJeff Roberson #ifdef UMA_DEBUG 19528355f576SJeff Roberson printf("UMA: vm asked us to release pages!\n"); 19538355f576SJeff Roberson #endif 195486bbae32SJeff Roberson bucket_enable(); 19558355f576SJeff Roberson zone_foreach(zone_drain); 19568355f576SJeff Roberson 19578355f576SJeff Roberson /* 19588355f576SJeff Roberson * Some slabs may have been freed but this zone will be visited early 19598355f576SJeff Roberson * we visit again so that we can free pages that are empty once other 19608355f576SJeff Roberson * zones are drained. We have to do the same for buckets. 19618355f576SJeff Roberson */ 19628355f576SJeff Roberson zone_drain(slabzone); 19638355f576SJeff Roberson zone_drain(bucketzone); 19648355f576SJeff Roberson } 19658355f576SJeff Roberson 19668355f576SJeff Roberson void * 19678355f576SJeff Roberson uma_large_malloc(int size, int wait) 19688355f576SJeff Roberson { 19698355f576SJeff Roberson void *mem; 19708355f576SJeff Roberson uma_slab_t slab; 19718355f576SJeff Roberson u_int8_t flags; 19728355f576SJeff Roberson 1973a553d4b8SJeff Roberson slab = uma_zalloc_internal(slabzone, NULL, wait, NULL); 19748355f576SJeff Roberson if (slab == NULL) 19758355f576SJeff Roberson return (NULL); 19768355f576SJeff Roberson 19778355f576SJeff Roberson mem = page_alloc(NULL, size, &flags, wait); 19788355f576SJeff Roberson if (mem) { 19798355f576SJeff Roberson slab->us_data = mem; 19808355f576SJeff Roberson slab->us_flags = flags | UMA_SLAB_MALLOC; 19818355f576SJeff Roberson slab->us_size = size; 19825a34a9f0SJeff Roberson mtx_lock(&malloc_mtx); 19838355f576SJeff Roberson UMA_HASH_INSERT(mallochash, slab, mem); 19845a34a9f0SJeff Roberson mtx_unlock(&malloc_mtx); 19858355f576SJeff Roberson } else { 19868355f576SJeff Roberson uma_zfree_internal(slabzone, slab, NULL, 0); 19878355f576SJeff Roberson } 19888355f576SJeff Roberson 19898355f576SJeff Roberson 19908355f576SJeff Roberson return (mem); 19918355f576SJeff Roberson } 19928355f576SJeff Roberson 19938355f576SJeff Roberson void 19948355f576SJeff Roberson uma_large_free(uma_slab_t slab) 19958355f576SJeff Roberson { 19965a34a9f0SJeff Roberson mtx_lock(&malloc_mtx); 19978355f576SJeff Roberson UMA_HASH_REMOVE(mallochash, slab, slab->us_data); 19985a34a9f0SJeff Roberson mtx_unlock(&malloc_mtx); 19998355f576SJeff Roberson page_free(slab->us_data, slab->us_size, slab->us_flags); 20008355f576SJeff Roberson uma_zfree_internal(slabzone, slab, NULL, 0); 20018355f576SJeff Roberson } 20028355f576SJeff Roberson 20038355f576SJeff Roberson void 20048355f576SJeff Roberson uma_print_stats(void) 20058355f576SJeff Roberson { 20068355f576SJeff Roberson zone_foreach(uma_print_zone); 20078355f576SJeff Roberson } 20088355f576SJeff Roberson 20098355f576SJeff Roberson void 20108355f576SJeff Roberson uma_print_zone(uma_zone_t zone) 20118355f576SJeff Roberson { 20128355f576SJeff Roberson printf("%s(%p) size %d(%d) flags %d ipers %d ppera %d out %d free %d\n", 20138355f576SJeff Roberson zone->uz_name, zone, zone->uz_size, zone->uz_rsize, zone->uz_flags, 20148355f576SJeff Roberson zone->uz_ipers, zone->uz_ppera, 20158355f576SJeff Roberson (zone->uz_ipers * zone->uz_pages) - zone->uz_free, zone->uz_free); 20168355f576SJeff Roberson } 20178355f576SJeff Roberson 20188355f576SJeff Roberson /* 20198355f576SJeff Roberson * Sysctl handler for vm.zone 20208355f576SJeff Roberson * 20218355f576SJeff Roberson * stolen from vm_zone.c 20228355f576SJeff Roberson */ 20238355f576SJeff Roberson static int 20248355f576SJeff Roberson sysctl_vm_zone(SYSCTL_HANDLER_ARGS) 20258355f576SJeff Roberson { 20268355f576SJeff Roberson int error, len, cnt; 20278355f576SJeff Roberson const int linesize = 128; /* conservative */ 20288355f576SJeff Roberson int totalfree; 20298355f576SJeff Roberson char *tmpbuf, *offset; 20308355f576SJeff Roberson uma_zone_t z; 20318355f576SJeff Roberson char *p; 20328355f576SJeff Roberson 20338355f576SJeff Roberson cnt = 0; 20340da47b2fSJeff Roberson mtx_lock(&uma_mtx); 20358355f576SJeff Roberson LIST_FOREACH(z, &uma_zones, uz_link) 20368355f576SJeff Roberson cnt++; 20370da47b2fSJeff Roberson mtx_unlock(&uma_mtx); 20388355f576SJeff Roberson MALLOC(tmpbuf, char *, (cnt == 0 ? 1 : cnt) * linesize, 20398355f576SJeff Roberson M_TEMP, M_WAITOK); 20408355f576SJeff Roberson len = snprintf(tmpbuf, linesize, 20418355f576SJeff Roberson "\nITEM SIZE LIMIT USED FREE REQUESTS\n\n"); 20428355f576SJeff Roberson if (cnt == 0) 20438355f576SJeff Roberson tmpbuf[len - 1] = '\0'; 20448355f576SJeff Roberson error = SYSCTL_OUT(req, tmpbuf, cnt == 0 ? len-1 : len); 20458355f576SJeff Roberson if (error || cnt == 0) 20468355f576SJeff Roberson goto out; 20478355f576SJeff Roberson offset = tmpbuf; 2048f4af24d5SJeff Roberson mtx_lock(&uma_mtx); 20498355f576SJeff Roberson LIST_FOREACH(z, &uma_zones, uz_link) { 20508355f576SJeff Roberson if (cnt == 0) /* list may have changed size */ 20518355f576SJeff Roberson break; 20528355f576SJeff Roberson ZONE_LOCK(z); 20538355f576SJeff Roberson totalfree = z->uz_free + z->uz_cachefree; 20548355f576SJeff Roberson len = snprintf(offset, linesize, 20558355f576SJeff Roberson "%-12.12s %6.6u, %8.8u, %6.6u, %6.6u, %8.8llu\n", 20568355f576SJeff Roberson z->uz_name, z->uz_size, 20578355f576SJeff Roberson z->uz_maxpages * z->uz_ipers, 20588355f576SJeff Roberson (z->uz_ipers * (z->uz_pages / z->uz_ppera)) - totalfree, 20598355f576SJeff Roberson totalfree, 20608355f576SJeff Roberson (unsigned long long)z->uz_allocs); 20618355f576SJeff Roberson ZONE_UNLOCK(z); 20628355f576SJeff Roberson for (p = offset + 12; p > offset && *p == ' '; --p) 20638355f576SJeff Roberson /* nothing */ ; 20648355f576SJeff Roberson p[1] = ':'; 20658355f576SJeff Roberson cnt--; 20668355f576SJeff Roberson offset += len; 20678355f576SJeff Roberson } 2068f4af24d5SJeff Roberson mtx_unlock(&uma_mtx); 20698355f576SJeff Roberson *offset++ = '\0'; 20708355f576SJeff Roberson error = SYSCTL_OUT(req, tmpbuf, offset - tmpbuf); 20718355f576SJeff Roberson out: 20728355f576SJeff Roberson FREE(tmpbuf, M_TEMP); 20738355f576SJeff Roberson return (error); 20748355f576SJeff Roberson } 2075