1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2002, 2003, 2004, 2005 Jeffrey Roberson <jeff@FreeBSD.org> 5 * Copyright (c) 2004, 2005 Bosko Milekic <bmilekic@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 * 31 */ 32 33 /* 34 * uma.h - External definitions for the Universal Memory Allocator 35 * 36 */ 37 38 #ifndef _VM_UMA_H_ 39 #define _VM_UMA_H_ 40 41 #include <sys/param.h> /* For NULL */ 42 #include <sys/malloc.h> /* For M_* */ 43 44 /* User visible parameters */ 45 #define UMA_SMALLEST_UNIT (PAGE_SIZE / 256) /* Smallest item allocated */ 46 47 /* Types and type defs */ 48 49 struct uma_zone; 50 /* Opaque type used as a handle to the zone */ 51 typedef struct uma_zone * uma_zone_t; 52 53 void zone_drain(uma_zone_t); 54 55 /* 56 * Item constructor 57 * 58 * Arguments: 59 * item A pointer to the memory which has been allocated. 60 * arg The arg field passed to uma_zalloc_arg 61 * size The size of the allocated item 62 * flags See zalloc flags 63 * 64 * Returns: 65 * 0 on success 66 * errno on failure 67 * 68 * Discussion: 69 * The constructor is called just before the memory is returned 70 * to the user. It may block if necessary. 71 */ 72 typedef int (*uma_ctor)(void *mem, int size, void *arg, int flags); 73 74 /* 75 * Item destructor 76 * 77 * Arguments: 78 * item A pointer to the memory which has been allocated. 79 * size The size of the item being destructed. 80 * arg Argument passed through uma_zfree_arg 81 * 82 * Returns: 83 * Nothing 84 * 85 * Discussion: 86 * The destructor may perform operations that differ from those performed 87 * by the initializer, but it must leave the object in the same state. 88 * This IS type stable storage. This is called after EVERY zfree call. 89 */ 90 typedef void (*uma_dtor)(void *mem, int size, void *arg); 91 92 /* 93 * Item initializer 94 * 95 * Arguments: 96 * item A pointer to the memory which has been allocated. 97 * size The size of the item being initialized. 98 * flags See zalloc flags 99 * 100 * Returns: 101 * 0 on success 102 * errno on failure 103 * 104 * Discussion: 105 * The initializer is called when the memory is cached in the uma zone. 106 * The initializer and the destructor should leave the object in the same 107 * state. 108 */ 109 typedef int (*uma_init)(void *mem, int size, int flags); 110 111 /* 112 * Item discard function 113 * 114 * Arguments: 115 * item A pointer to memory which has been 'freed' but has not left the 116 * zone's cache. 117 * size The size of the item being discarded. 118 * 119 * Returns: 120 * Nothing 121 * 122 * Discussion: 123 * This routine is called when memory leaves a zone and is returned to the 124 * system for other uses. It is the counter-part to the init function. 125 */ 126 typedef void (*uma_fini)(void *mem, int size); 127 128 /* 129 * Import new memory into a cache zone. 130 */ 131 typedef int (*uma_import)(void *arg, void **store, int count, int domain, 132 int flags); 133 134 /* 135 * Free memory from a cache zone. 136 */ 137 typedef void (*uma_release)(void *arg, void **store, int count); 138 139 /* 140 * What's the difference between initializing and constructing? 141 * 142 * The item is initialized when it is cached, and this is the state that the 143 * object should be in when returned to the allocator. The purpose of this is 144 * to remove some code which would otherwise be called on each allocation by 145 * utilizing a known, stable state. This differs from the constructor which 146 * will be called on EVERY allocation. 147 * 148 * For example, in the initializer you may want to initialize embedded locks, 149 * NULL list pointers, set up initial states, magic numbers, etc. This way if 150 * the object is held in the allocator and re-used it won't be necessary to 151 * re-initialize it. 152 * 153 * The constructor may be used to lock a data structure, link it on to lists, 154 * bump reference counts or total counts of outstanding structures, etc. 155 * 156 */ 157 158 159 /* Function proto types */ 160 161 /* 162 * Create a new uma zone 163 * 164 * Arguments: 165 * name The text name of the zone for debugging and stats. This memory 166 * should not be freed until the zone has been deallocated. 167 * size The size of the object that is being created. 168 * ctor The constructor that is called when the object is allocated. 169 * dtor The destructor that is called when the object is freed. 170 * init An initializer that sets up the initial state of the memory. 171 * fini A discard function that undoes initialization done by init. 172 * ctor/dtor/init/fini may all be null, see notes above. 173 * align A bitmask that corresponds to the requested alignment 174 * eg 4 would be 0x3 175 * flags A set of parameters that control the behavior of the zone. 176 * 177 * Returns: 178 * A pointer to a structure which is intended to be opaque to users of 179 * the interface. The value may be null if the wait flag is not set. 180 */ 181 uma_zone_t uma_zcreate(const char *name, size_t size, uma_ctor ctor, 182 uma_dtor dtor, uma_init uminit, uma_fini fini, 183 int align, uint32_t flags); 184 185 /* 186 * Create a secondary uma zone 187 * 188 * Arguments: 189 * name The text name of the zone for debugging and stats. This memory 190 * should not be freed until the zone has been deallocated. 191 * ctor The constructor that is called when the object is allocated. 192 * dtor The destructor that is called when the object is freed. 193 * zinit An initializer that sets up the initial state of the memory 194 * as the object passes from the Keg's slab to the Zone's cache. 195 * zfini A discard function that undoes initialization done by init 196 * as the object passes from the Zone's cache to the Keg's slab. 197 * 198 * ctor/dtor/zinit/zfini may all be null, see notes above. 199 * Note that the zinit and zfini specified here are NOT 200 * exactly the same as the init/fini specified to uma_zcreate() 201 * when creating a master zone. These zinit/zfini are called 202 * on the TRANSITION from keg to zone (and vice-versa). Once 203 * these are set, the primary zone may alter its init/fini 204 * (which are called when the object passes from VM to keg) 205 * using uma_zone_set_init/fini()) as well as its own 206 * zinit/zfini (unset by default for master zone) with 207 * uma_zone_set_zinit/zfini() (note subtle 'z' prefix). 208 * 209 * master A reference to this zone's Master Zone (Primary Zone), 210 * which contains the backing Keg for the Secondary Zone 211 * being added. 212 * 213 * Returns: 214 * A pointer to a structure which is intended to be opaque to users of 215 * the interface. The value may be null if the wait flag is not set. 216 */ 217 uma_zone_t uma_zsecond_create(char *name, uma_ctor ctor, uma_dtor dtor, 218 uma_init zinit, uma_fini zfini, uma_zone_t master); 219 220 /* 221 * Create cache-only zones. 222 * 223 * This allows uma's per-cpu cache facilities to handle arbitrary 224 * pointers. Consumers must specify the import and release functions to 225 * fill and destroy caches. UMA does not allocate any memory for these 226 * zones. The 'arg' parameter is passed to import/release and is caller 227 * specific. 228 */ 229 uma_zone_t uma_zcache_create(char *name, int size, uma_ctor ctor, uma_dtor dtor, 230 uma_init zinit, uma_fini zfini, uma_import zimport, 231 uma_release zrelease, void *arg, int flags); 232 233 /* 234 * Definitions for uma_zcreate flags 235 * 236 * These flags share space with UMA_ZFLAGs in uma_int.h. Be careful not to 237 * overlap when adding new features. 0xff000000 is in use by uma_int.h. 238 */ 239 #define UMA_ZONE_PAGEABLE 0x0001 /* Return items not fully backed by 240 physical memory XXX Not yet */ 241 #define UMA_ZONE_ZINIT 0x0002 /* Initialize with zeros */ 242 #define UMA_ZONE_STATIC 0x0004 /* Statically sized zone */ 243 #define UMA_ZONE_OFFPAGE 0x0008 /* Force the slab structure allocation 244 off of the real memory */ 245 #define UMA_ZONE_MALLOC 0x0010 /* For use by malloc(9) only! */ 246 #define UMA_ZONE_NOFREE 0x0020 /* Do not free slabs of this type! */ 247 #define UMA_ZONE_MTXCLASS 0x0040 /* Create a new lock class */ 248 #define UMA_ZONE_VM 0x0080 /* 249 * Used for internal vm datastructures 250 * only. 251 */ 252 #define UMA_ZONE_HASH 0x0100 /* 253 * Use a hash table instead of caching 254 * information in the vm_page. 255 */ 256 #define UMA_ZONE_SECONDARY 0x0200 /* Zone is a Secondary Zone */ 257 #define UMA_ZONE_NOBUCKET 0x0400 /* Do not use buckets. */ 258 #define UMA_ZONE_MAXBUCKET 0x0800 /* Use largest buckets. */ 259 #define UMA_ZONE_CACHESPREAD 0x1000 /* 260 * Spread memory start locations across 261 * all possible cache lines. May 262 * require many virtually contiguous 263 * backend pages and can fail early. 264 */ 265 #define UMA_ZONE_VTOSLAB 0x2000 /* Zone uses vtoslab for lookup. */ 266 #define UMA_ZONE_NODUMP 0x4000 /* 267 * Zone's pages will not be included in 268 * mini-dumps. 269 */ 270 #define UMA_ZONE_PCPU 0x8000 /* 271 * Allocates mp_maxid + 1 slabs of PAGE_SIZE 272 */ 273 #define UMA_ZONE_NUMA 0x10000 /* 274 * NUMA aware Zone. Implements a best 275 * effort first-touch policy. 276 */ 277 278 /* 279 * These flags are shared between the keg and zone. In zones wishing to add 280 * new kegs these flags must be compatible. Some are determined based on 281 * physical parameters of the request and may not be provided by the consumer. 282 */ 283 #define UMA_ZONE_INHERIT \ 284 (UMA_ZONE_OFFPAGE | UMA_ZONE_MALLOC | UMA_ZONE_NOFREE | \ 285 UMA_ZONE_HASH | UMA_ZONE_VTOSLAB | UMA_ZONE_PCPU) 286 287 /* Definitions for align */ 288 #define UMA_ALIGN_PTR (sizeof(void *) - 1) /* Alignment fit for ptr */ 289 #define UMA_ALIGN_LONG (sizeof(long) - 1) /* "" long */ 290 #define UMA_ALIGN_INT (sizeof(int) - 1) /* "" int */ 291 #define UMA_ALIGN_SHORT (sizeof(short) - 1) /* "" short */ 292 #define UMA_ALIGN_CHAR (sizeof(char) - 1) /* "" char */ 293 #define UMA_ALIGN_CACHE (0 - 1) /* Cache line size align */ 294 #define UMA_ALIGNOF(type) (_Alignof(type) - 1) /* Alignment fit for 'type' */ 295 296 /* 297 * Destroys an empty uma zone. If the zone is not empty uma complains loudly. 298 * 299 * Arguments: 300 * zone The zone we want to destroy. 301 * 302 */ 303 void uma_zdestroy(uma_zone_t zone); 304 305 /* 306 * Allocates an item out of a zone 307 * 308 * Arguments: 309 * zone The zone we are allocating from 310 * arg This data is passed to the ctor function 311 * flags See sys/malloc.h for available flags. 312 * 313 * Returns: 314 * A non-null pointer to an initialized element from the zone is 315 * guaranteed if the wait flag is M_WAITOK. Otherwise a null pointer 316 * may be returned if the zone is empty or the ctor failed. 317 */ 318 319 void *uma_zalloc_arg(uma_zone_t zone, void *arg, int flags); 320 void *uma_zalloc_pcpu_arg(uma_zone_t zone, void *arg, int flags); 321 322 /* 323 * Allocate an item from a specific NUMA domain. This uses a slow path in 324 * the allocator but is guaranteed to allocate memory from the requested 325 * domain if M_WAITOK is set. 326 * 327 * Arguments: 328 * zone The zone we are allocating from 329 * arg This data is passed to the ctor function 330 * domain The domain to allocate from. 331 * flags See sys/malloc.h for available flags. 332 */ 333 void *uma_zalloc_domain(uma_zone_t zone, void *arg, int domain, int flags); 334 335 /* 336 * Allocates an item out of a zone without supplying an argument 337 * 338 * This is just a wrapper for uma_zalloc_arg for convenience. 339 * 340 */ 341 static __inline void *uma_zalloc(uma_zone_t zone, int flags); 342 static __inline void *uma_zalloc_pcpu(uma_zone_t zone, int flags); 343 344 static __inline void * 345 uma_zalloc(uma_zone_t zone, int flags) 346 { 347 return uma_zalloc_arg(zone, NULL, flags); 348 } 349 350 static __inline void * 351 uma_zalloc_pcpu(uma_zone_t zone, int flags) 352 { 353 return uma_zalloc_pcpu_arg(zone, NULL, flags); 354 } 355 356 /* 357 * Frees an item back into the specified zone. 358 * 359 * Arguments: 360 * zone The zone the item was originally allocated out of. 361 * item The memory to be freed. 362 * arg Argument passed to the destructor 363 * 364 * Returns: 365 * Nothing. 366 */ 367 368 void uma_zfree_arg(uma_zone_t zone, void *item, void *arg); 369 void uma_zfree_pcpu_arg(uma_zone_t zone, void *item, void *arg); 370 371 /* 372 * Frees an item back to the specified zone's domain specific pool. 373 * 374 * Arguments: 375 * zone The zone the item was originally allocated out of. 376 * item The memory to be freed. 377 * arg Argument passed to the destructor 378 */ 379 void uma_zfree_domain(uma_zone_t zone, void *item, void *arg); 380 381 /* 382 * Frees an item back to a zone without supplying an argument 383 * 384 * This is just a wrapper for uma_zfree_arg for convenience. 385 * 386 */ 387 static __inline void uma_zfree(uma_zone_t zone, void *item); 388 static __inline void uma_zfree_pcpu(uma_zone_t zone, void *item); 389 390 static __inline void 391 uma_zfree(uma_zone_t zone, void *item) 392 { 393 uma_zfree_arg(zone, item, NULL); 394 } 395 396 static __inline void 397 uma_zfree_pcpu(uma_zone_t zone, void *item) 398 { 399 uma_zfree_pcpu_arg(zone, item, NULL); 400 } 401 402 /* 403 * Wait until the specified zone can allocate an item. 404 */ 405 void uma_zwait(uma_zone_t zone); 406 407 /* 408 * Backend page supplier routines 409 * 410 * Arguments: 411 * zone The zone that is requesting pages. 412 * size The number of bytes being requested. 413 * pflag Flags for these memory pages, see below. 414 * domain The NUMA domain that we prefer for this allocation. 415 * wait Indicates our willingness to block. 416 * 417 * Returns: 418 * A pointer to the allocated memory or NULL on failure. 419 */ 420 421 typedef void *(*uma_alloc)(uma_zone_t zone, vm_size_t size, int domain, 422 uint8_t *pflag, int wait); 423 424 /* 425 * Backend page free routines 426 * 427 * Arguments: 428 * item A pointer to the previously allocated pages. 429 * size The original size of the allocation. 430 * pflag The flags for the slab. See UMA_SLAB_* below. 431 * 432 * Returns: 433 * None 434 */ 435 typedef void (*uma_free)(void *item, vm_size_t size, uint8_t pflag); 436 437 /* 438 * Reclaims unused memory for all zones 439 * 440 * Arguments: 441 * None 442 * Returns: 443 * None 444 * 445 * This should only be called by the page out daemon. 446 */ 447 448 void uma_reclaim(void); 449 450 /* 451 * Sets the alignment mask to be used for all zones requesting cache 452 * alignment. Should be called by MD boot code prior to starting VM/UMA. 453 * 454 * Arguments: 455 * align The alignment mask 456 * 457 * Returns: 458 * Nothing 459 */ 460 void uma_set_align(int align); 461 462 /* 463 * Set a reserved number of items to hold for M_USE_RESERVE allocations. All 464 * other requests must allocate new backing pages. 465 */ 466 void uma_zone_reserve(uma_zone_t zone, int nitems); 467 468 /* 469 * Reserves the maximum KVA space required by the zone and configures the zone 470 * to use a VM_ALLOC_NOOBJ-based backend allocator. 471 * 472 * Arguments: 473 * zone The zone to update. 474 * nitems The upper limit on the number of items that can be allocated. 475 * 476 * Returns: 477 * 0 if KVA space can not be allocated 478 * 1 if successful 479 * 480 * Discussion: 481 * When the machine supports a direct map and the zone's items are smaller 482 * than a page, the zone will use the direct map instead of allocating KVA 483 * space. 484 */ 485 int uma_zone_reserve_kva(uma_zone_t zone, int nitems); 486 487 /* 488 * Sets a high limit on the number of items allowed in a zone 489 * 490 * Arguments: 491 * zone The zone to limit 492 * nitems The requested upper limit on the number of items allowed 493 * 494 * Returns: 495 * int The effective value of nitems after rounding up based on page size 496 */ 497 int uma_zone_set_max(uma_zone_t zone, int nitems); 498 499 /* 500 * Sets a high limit on the number of items allowed in zone's bucket cache 501 * 502 * Arguments: 503 * zone The zone to limit 504 * nitems The requested upper limit on the number of items allowed 505 * 506 * Returns: 507 * int The effective value of nitems set 508 */ 509 int uma_zone_set_maxcache(uma_zone_t zone, int nitems); 510 511 /* 512 * Obtains the effective limit on the number of items in a zone 513 * 514 * Arguments: 515 * zone The zone to obtain the effective limit from 516 * 517 * Return: 518 * 0 No limit 519 * int The effective limit of the zone 520 */ 521 int uma_zone_get_max(uma_zone_t zone); 522 523 /* 524 * Sets a warning to be printed when limit is reached 525 * 526 * Arguments: 527 * zone The zone we will warn about 528 * warning Warning content 529 * 530 * Returns: 531 * Nothing 532 */ 533 void uma_zone_set_warning(uma_zone_t zone, const char *warning); 534 535 /* 536 * Sets a function to run when limit is reached 537 * 538 * Arguments: 539 * zone The zone to which this applies 540 * fx The function ro run 541 * 542 * Returns: 543 * Nothing 544 */ 545 typedef void (*uma_maxaction_t)(uma_zone_t, int); 546 void uma_zone_set_maxaction(uma_zone_t zone, uma_maxaction_t); 547 548 /* 549 * Obtains the approximate current number of items allocated from a zone 550 * 551 * Arguments: 552 * zone The zone to obtain the current allocation count from 553 * 554 * Return: 555 * int The approximate current number of items allocated from the zone 556 */ 557 int uma_zone_get_cur(uma_zone_t zone); 558 559 /* 560 * The following two routines (uma_zone_set_init/fini) 561 * are used to set the backend init/fini pair which acts on an 562 * object as it becomes allocated and is placed in a slab within 563 * the specified zone's backing keg. These should probably not 564 * be changed once allocations have already begun, but only be set 565 * immediately upon zone creation. 566 */ 567 void uma_zone_set_init(uma_zone_t zone, uma_init uminit); 568 void uma_zone_set_fini(uma_zone_t zone, uma_fini fini); 569 570 /* 571 * The following two routines (uma_zone_set_zinit/zfini) are 572 * used to set the zinit/zfini pair which acts on an object as 573 * it passes from the backing Keg's slab cache to the 574 * specified Zone's bucket cache. These should probably not 575 * be changed once allocations have already begun, but only be set 576 * immediately upon zone creation. 577 */ 578 void uma_zone_set_zinit(uma_zone_t zone, uma_init zinit); 579 void uma_zone_set_zfini(uma_zone_t zone, uma_fini zfini); 580 581 /* 582 * Replaces the standard backend allocator for this zone. 583 * 584 * Arguments: 585 * zone The zone whose backend allocator is being changed. 586 * allocf A pointer to the allocation function 587 * 588 * Returns: 589 * Nothing 590 * 591 * Discussion: 592 * This could be used to implement pageable allocation, or perhaps 593 * even DMA allocators if used in conjunction with the OFFPAGE 594 * zone flag. 595 */ 596 597 void uma_zone_set_allocf(uma_zone_t zone, uma_alloc allocf); 598 599 /* 600 * Used for freeing memory provided by the allocf above 601 * 602 * Arguments: 603 * zone The zone that intends to use this free routine. 604 * freef The page freeing routine. 605 * 606 * Returns: 607 * Nothing 608 */ 609 610 void uma_zone_set_freef(uma_zone_t zone, uma_free freef); 611 612 /* 613 * These flags are setable in the allocf and visible in the freef. 614 */ 615 #define UMA_SLAB_BOOT 0x01 /* Slab alloced from boot pages */ 616 #define UMA_SLAB_KERNEL 0x04 /* Slab alloced from kmem */ 617 #define UMA_SLAB_PRIV 0x08 /* Slab alloced from priv allocator */ 618 #define UMA_SLAB_OFFP 0x10 /* Slab is managed separately */ 619 #define UMA_SLAB_MALLOC 0x20 /* Slab is a large malloc slab */ 620 /* 0x02, 0x40, and 0x80 are available */ 621 622 /* 623 * Used to pre-fill a zone with some number of items 624 * 625 * Arguments: 626 * zone The zone to fill 627 * itemcnt The number of items to reserve 628 * 629 * Returns: 630 * Nothing 631 * 632 * NOTE: This is blocking and should only be done at startup 633 */ 634 void uma_prealloc(uma_zone_t zone, int itemcnt); 635 636 /* 637 * Used to determine if a fixed-size zone is exhausted. 638 * 639 * Arguments: 640 * zone The zone to check 641 * 642 * Returns: 643 * Non-zero if zone is exhausted. 644 */ 645 int uma_zone_exhausted(uma_zone_t zone); 646 int uma_zone_exhausted_nolock(uma_zone_t zone); 647 648 /* 649 * Common UMA_ZONE_PCPU zones. 650 */ 651 extern uma_zone_t pcpu_zone_64; 652 extern uma_zone_t pcpu_zone_ptr; 653 654 /* 655 * Exported statistics structures to be used by user space monitoring tools. 656 * Statistics stream consists of a uma_stream_header, followed by a series of 657 * alternative uma_type_header and uma_type_stat structures. 658 */ 659 #define UMA_STREAM_VERSION 0x00000001 660 struct uma_stream_header { 661 uint32_t ush_version; /* Stream format version. */ 662 uint32_t ush_maxcpus; /* Value of MAXCPU for stream. */ 663 uint32_t ush_count; /* Number of records. */ 664 uint32_t _ush_pad; /* Pad/reserved field. */ 665 }; 666 667 #define UTH_MAX_NAME 32 668 #define UTH_ZONE_SECONDARY 0x00000001 669 struct uma_type_header { 670 /* 671 * Static per-zone data, some extracted from the supporting keg. 672 */ 673 char uth_name[UTH_MAX_NAME]; 674 uint32_t uth_align; /* Keg: alignment. */ 675 uint32_t uth_size; /* Keg: requested size of item. */ 676 uint32_t uth_rsize; /* Keg: real size of item. */ 677 uint32_t uth_maxpages; /* Keg: maximum number of pages. */ 678 uint32_t uth_limit; /* Keg: max items to allocate. */ 679 680 /* 681 * Current dynamic zone/keg-derived statistics. 682 */ 683 uint32_t uth_pages; /* Keg: pages allocated. */ 684 uint32_t uth_keg_free; /* Keg: items free. */ 685 uint32_t uth_zone_free; /* Zone: items free. */ 686 uint32_t uth_bucketsize; /* Zone: desired bucket size. */ 687 uint32_t uth_zone_flags; /* Zone: flags. */ 688 uint64_t uth_allocs; /* Zone: number of allocations. */ 689 uint64_t uth_frees; /* Zone: number of frees. */ 690 uint64_t uth_fails; /* Zone: number of alloc failures. */ 691 uint64_t uth_sleeps; /* Zone: number of alloc sleeps. */ 692 uint64_t _uth_reserved1[2]; /* Reserved. */ 693 }; 694 695 struct uma_percpu_stat { 696 uint64_t ups_allocs; /* Cache: number of allocations. */ 697 uint64_t ups_frees; /* Cache: number of frees. */ 698 uint64_t ups_cache_free; /* Cache: free items in cache. */ 699 uint64_t _ups_reserved[5]; /* Reserved. */ 700 }; 701 702 void uma_reclaim_wakeup(void); 703 void uma_reclaim_worker(void *); 704 705 unsigned long uma_limit(void); 706 707 /* Return the amount of memory managed by UMA. */ 708 unsigned long uma_size(void); 709 710 /* Return the amount of memory remaining. May be negative. */ 711 long uma_avail(void); 712 713 #endif /* _VM_UMA_H_ */ 714