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 /* 54 * Item constructor 55 * 56 * Arguments: 57 * item A pointer to the memory which has been allocated. 58 * arg The arg field passed to uma_zalloc_arg 59 * size The size of the allocated item 60 * flags See zalloc flags 61 * 62 * Returns: 63 * 0 on success 64 * errno on failure 65 * 66 * Discussion: 67 * The constructor is called just before the memory is returned 68 * to the user. It may block if necessary. 69 */ 70 typedef int (*uma_ctor)(void *mem, int size, void *arg, int flags); 71 72 /* 73 * Item destructor 74 * 75 * Arguments: 76 * item A pointer to the memory which has been allocated. 77 * size The size of the item being destructed. 78 * arg Argument passed through uma_zfree_arg 79 * 80 * Returns: 81 * Nothing 82 * 83 * Discussion: 84 * The destructor may perform operations that differ from those performed 85 * by the initializer, but it must leave the object in the same state. 86 * This IS type stable storage. This is called after EVERY zfree call. 87 */ 88 typedef void (*uma_dtor)(void *mem, int size, void *arg); 89 90 /* 91 * Item initializer 92 * 93 * Arguments: 94 * item A pointer to the memory which has been allocated. 95 * size The size of the item being initialized. 96 * flags See zalloc flags 97 * 98 * Returns: 99 * 0 on success 100 * errno on failure 101 * 102 * Discussion: 103 * The initializer is called when the memory is cached in the uma zone. 104 * The initializer and the destructor should leave the object in the same 105 * state. 106 */ 107 typedef int (*uma_init)(void *mem, int size, int flags); 108 109 /* 110 * Item discard function 111 * 112 * Arguments: 113 * item A pointer to memory which has been 'freed' but has not left the 114 * zone's cache. 115 * size The size of the item being discarded. 116 * 117 * Returns: 118 * Nothing 119 * 120 * Discussion: 121 * This routine is called when memory leaves a zone and is returned to the 122 * system for other uses. It is the counter-part to the init function. 123 */ 124 typedef void (*uma_fini)(void *mem, int size); 125 126 /* 127 * Import new memory into a cache zone. 128 */ 129 typedef int (*uma_import)(void *arg, void **store, int count, int domain, 130 int flags); 131 132 /* 133 * Free memory from a cache zone. 134 */ 135 typedef void (*uma_release)(void *arg, void **store, int count); 136 137 /* 138 * What's the difference between initializing and constructing? 139 * 140 * The item is initialized when it is cached, and this is the state that the 141 * object should be in when returned to the allocator. The purpose of this is 142 * to remove some code which would otherwise be called on each allocation by 143 * utilizing a known, stable state. This differs from the constructor which 144 * will be called on EVERY allocation. 145 * 146 * For example, in the initializer you may want to initialize embedded locks, 147 * NULL list pointers, set up initial states, magic numbers, etc. This way if 148 * the object is held in the allocator and re-used it won't be necessary to 149 * re-initialize it. 150 * 151 * The constructor may be used to lock a data structure, link it on to lists, 152 * bump reference counts or total counts of outstanding structures, etc. 153 * 154 */ 155 156 157 /* Function proto types */ 158 159 /* 160 * Create a new uma zone 161 * 162 * Arguments: 163 * name The text name of the zone for debugging and stats. This memory 164 * should not be freed until the zone has been deallocated. 165 * size The size of the object that is being created. 166 * ctor The constructor that is called when the object is allocated. 167 * dtor The destructor that is called when the object is freed. 168 * init An initializer that sets up the initial state of the memory. 169 * fini A discard function that undoes initialization done by init. 170 * ctor/dtor/init/fini may all be null, see notes above. 171 * align A bitmask that corresponds to the requested alignment 172 * eg 4 would be 0x3 173 * flags A set of parameters that control the behavior of the zone. 174 * 175 * Returns: 176 * A pointer to a structure which is intended to be opaque to users of 177 * the interface. The value may be null if the wait flag is not set. 178 */ 179 uma_zone_t uma_zcreate(const char *name, size_t size, uma_ctor ctor, 180 uma_dtor dtor, uma_init uminit, uma_fini fini, 181 int align, uint32_t flags); 182 183 /* 184 * Create a secondary uma zone 185 * 186 * Arguments: 187 * name The text name of the zone for debugging and stats. This memory 188 * should not be freed until the zone has been deallocated. 189 * ctor The constructor that is called when the object is allocated. 190 * dtor The destructor that is called when the object is freed. 191 * zinit An initializer that sets up the initial state of the memory 192 * as the object passes from the Keg's slab to the Zone's cache. 193 * zfini A discard function that undoes initialization done by init 194 * as the object passes from the Zone's cache to the Keg's slab. 195 * 196 * ctor/dtor/zinit/zfini may all be null, see notes above. 197 * Note that the zinit and zfini specified here are NOT 198 * exactly the same as the init/fini specified to uma_zcreate() 199 * when creating a master zone. These zinit/zfini are called 200 * on the TRANSITION from keg to zone (and vice-versa). Once 201 * these are set, the primary zone may alter its init/fini 202 * (which are called when the object passes from VM to keg) 203 * using uma_zone_set_init/fini()) as well as its own 204 * zinit/zfini (unset by default for master zone) with 205 * uma_zone_set_zinit/zfini() (note subtle 'z' prefix). 206 * 207 * master A reference to this zone's Master Zone (Primary Zone), 208 * which contains the backing Keg for the Secondary Zone 209 * being added. 210 * 211 * Returns: 212 * A pointer to a structure which is intended to be opaque to users of 213 * the interface. The value may be null if the wait flag is not set. 214 */ 215 uma_zone_t uma_zsecond_create(char *name, uma_ctor ctor, uma_dtor dtor, 216 uma_init zinit, uma_fini zfini, uma_zone_t master); 217 218 /* 219 * Create cache-only zones. 220 * 221 * This allows uma's per-cpu cache facilities to handle arbitrary 222 * pointers. Consumers must specify the import and release functions to 223 * fill and destroy caches. UMA does not allocate any memory for these 224 * zones. The 'arg' parameter is passed to import/release and is caller 225 * specific. 226 */ 227 uma_zone_t uma_zcache_create(char *name, int size, uma_ctor ctor, uma_dtor dtor, 228 uma_init zinit, uma_fini zfini, uma_import zimport, 229 uma_release zrelease, void *arg, int flags); 230 231 /* 232 * Definitions for uma_zcreate flags 233 * 234 * These flags share space with UMA_ZFLAGs in uma_int.h. Be careful not to 235 * overlap when adding new features. 0xff000000 is in use by uma_int.h. 236 */ 237 #define UMA_ZONE_PAGEABLE 0x0001 /* Return items not fully backed by 238 physical memory XXX Not yet */ 239 #define UMA_ZONE_ZINIT 0x0002 /* Initialize with zeros */ 240 #define UMA_ZONE_STATIC 0x0004 /* Statically sized zone */ 241 #define UMA_ZONE_OFFPAGE 0x0008 /* Force the slab structure allocation 242 off of the real memory */ 243 #define UMA_ZONE_MALLOC 0x0010 /* For use by malloc(9) only! */ 244 #define UMA_ZONE_NOFREE 0x0020 /* Do not free slabs of this type! */ 245 #define UMA_ZONE_MTXCLASS 0x0040 /* Create a new lock class */ 246 #define UMA_ZONE_VM 0x0080 /* 247 * Used for internal vm datastructures 248 * only. 249 */ 250 #define UMA_ZONE_HASH 0x0100 /* 251 * Use a hash table instead of caching 252 * information in the vm_page. 253 */ 254 #define UMA_ZONE_SECONDARY 0x0200 /* Zone is a Secondary Zone */ 255 #define UMA_ZONE_NOBUCKET 0x0400 /* Do not use buckets. */ 256 #define UMA_ZONE_MAXBUCKET 0x0800 /* Use largest buckets. */ 257 #define UMA_ZONE_CACHESPREAD 0x1000 /* 258 * Spread memory start locations across 259 * all possible cache lines. May 260 * require many virtually contiguous 261 * backend pages and can fail early. 262 */ 263 #define UMA_ZONE_VTOSLAB 0x2000 /* Zone uses vtoslab for lookup. */ 264 #define UMA_ZONE_NODUMP 0x4000 /* 265 * Zone's pages will not be included in 266 * mini-dumps. 267 */ 268 #define UMA_ZONE_PCPU 0x8000 /* 269 * Allocates mp_maxid + 1 slabs of PAGE_SIZE 270 */ 271 #define UMA_ZONE_NUMA 0x10000 /* 272 * NUMA aware Zone. Implements a best 273 * effort first-touch policy. 274 */ 275 #define UMA_ZONE_MINBUCKET 0x20000 /* Use smallest buckets. */ 276 277 /* 278 * These flags are shared between the keg and zone. In zones wishing to add 279 * new kegs these flags must be compatible. Some are determined based on 280 * physical parameters of the request and may not be provided by the consumer. 281 */ 282 #define UMA_ZONE_INHERIT \ 283 (UMA_ZONE_OFFPAGE | UMA_ZONE_MALLOC | UMA_ZONE_NOFREE | \ 284 UMA_ZONE_HASH | UMA_ZONE_VTOSLAB | UMA_ZONE_PCPU | UMA_ZONE_NUMA) 285 286 /* Definitions for align */ 287 #define UMA_ALIGN_PTR (sizeof(void *) - 1) /* Alignment fit for ptr */ 288 #define UMA_ALIGN_LONG (sizeof(long) - 1) /* "" long */ 289 #define UMA_ALIGN_INT (sizeof(int) - 1) /* "" int */ 290 #define UMA_ALIGN_SHORT (sizeof(short) - 1) /* "" short */ 291 #define UMA_ALIGN_CHAR (sizeof(char) - 1) /* "" char */ 292 #define UMA_ALIGN_CACHE (0 - 1) /* Cache line size align */ 293 #define UMA_ALIGNOF(type) (_Alignof(type) - 1) /* Alignment fit for 'type' */ 294 295 #define UMA_ANYDOMAIN -1 /* Special value for domain search. */ 296 297 /* 298 * Destroys an empty uma zone. If the zone is not empty uma complains loudly. 299 * 300 * Arguments: 301 * zone The zone we want to destroy. 302 * 303 */ 304 void uma_zdestroy(uma_zone_t zone); 305 306 /* 307 * Allocates an item out of a zone 308 * 309 * Arguments: 310 * zone The zone we are allocating from 311 * arg This data is passed to the ctor function 312 * flags See sys/malloc.h for available flags. 313 * 314 * Returns: 315 * A non-null pointer to an initialized element from the zone is 316 * guaranteed if the wait flag is M_WAITOK. Otherwise a null pointer 317 * may be returned if the zone is empty or the ctor failed. 318 */ 319 320 void *uma_zalloc_arg(uma_zone_t zone, void *arg, int flags); 321 void *uma_zalloc_pcpu_arg(uma_zone_t zone, void *arg, int flags); 322 323 /* 324 * Allocate an item from a specific NUMA domain. This uses a slow path in 325 * the allocator but is guaranteed to allocate memory from the requested 326 * domain if M_WAITOK is set. 327 * 328 * Arguments: 329 * zone The zone we are allocating from 330 * arg This data is passed to the ctor function 331 * domain The domain to allocate from. 332 * flags See sys/malloc.h for available flags. 333 */ 334 void *uma_zalloc_domain(uma_zone_t zone, void *arg, int domain, int flags); 335 336 /* 337 * Allocates an item out of a zone without supplying an argument 338 * 339 * This is just a wrapper for uma_zalloc_arg for convenience. 340 * 341 */ 342 static __inline void *uma_zalloc(uma_zone_t zone, int flags); 343 static __inline void *uma_zalloc_pcpu(uma_zone_t zone, int flags); 344 345 static __inline void * 346 uma_zalloc(uma_zone_t zone, int flags) 347 { 348 return uma_zalloc_arg(zone, NULL, flags); 349 } 350 351 static __inline void * 352 uma_zalloc_pcpu(uma_zone_t zone, int flags) 353 { 354 return uma_zalloc_pcpu_arg(zone, NULL, flags); 355 } 356 357 /* 358 * Frees an item back into the specified zone. 359 * 360 * Arguments: 361 * zone The zone the item was originally allocated out of. 362 * item The memory to be freed. 363 * arg Argument passed to the destructor 364 * 365 * Returns: 366 * Nothing. 367 */ 368 369 void uma_zfree_arg(uma_zone_t zone, void *item, void *arg); 370 void uma_zfree_pcpu_arg(uma_zone_t zone, void *item, void *arg); 371 372 /* 373 * Frees an item back to the specified zone's domain specific pool. 374 * 375 * Arguments: 376 * zone The zone the item was originally allocated out of. 377 * item The memory to be freed. 378 * arg Argument passed to the destructor 379 */ 380 void uma_zfree_domain(uma_zone_t zone, void *item, void *arg); 381 382 /* 383 * Frees an item back to a zone without supplying an argument 384 * 385 * This is just a wrapper for uma_zfree_arg for convenience. 386 * 387 */ 388 static __inline void uma_zfree(uma_zone_t zone, void *item); 389 static __inline void uma_zfree_pcpu(uma_zone_t zone, void *item); 390 391 static __inline void 392 uma_zfree(uma_zone_t zone, void *item) 393 { 394 uma_zfree_arg(zone, item, NULL); 395 } 396 397 static __inline void 398 uma_zfree_pcpu(uma_zone_t zone, void *item) 399 { 400 uma_zfree_pcpu_arg(zone, item, NULL); 401 } 402 403 /* 404 * Wait until the specified zone can allocate an item. 405 */ 406 void uma_zwait(uma_zone_t zone); 407 408 /* 409 * Backend page supplier routines 410 * 411 * Arguments: 412 * zone The zone that is requesting pages. 413 * size The number of bytes being requested. 414 * pflag Flags for these memory pages, see below. 415 * domain The NUMA domain that we prefer for this allocation. 416 * wait Indicates our willingness to block. 417 * 418 * Returns: 419 * A pointer to the allocated memory or NULL on failure. 420 */ 421 422 typedef void *(*uma_alloc)(uma_zone_t zone, vm_size_t size, int domain, 423 uint8_t *pflag, int wait); 424 425 /* 426 * Backend page free routines 427 * 428 * Arguments: 429 * item A pointer to the previously allocated pages. 430 * size The original size of the allocation. 431 * pflag The flags for the slab. See UMA_SLAB_* below. 432 * 433 * Returns: 434 * None 435 */ 436 typedef void (*uma_free)(void *item, vm_size_t size, uint8_t pflag); 437 438 /* 439 * Reclaims unused memory 440 * 441 * Arguments: 442 * req Reclamation request type. 443 * Returns: 444 * None 445 */ 446 #define UMA_RECLAIM_DRAIN 1 /* release bucket cache */ 447 #define UMA_RECLAIM_DRAIN_CPU 2 /* release bucket and per-CPU caches */ 448 #define UMA_RECLAIM_TRIM 3 /* trim bucket cache to WSS */ 449 void uma_reclaim(int req); 450 void uma_zone_reclaim(uma_zone_t, int req); 451 452 /* 453 * Sets the alignment mask to be used for all zones requesting cache 454 * alignment. Should be called by MD boot code prior to starting VM/UMA. 455 * 456 * Arguments: 457 * align The alignment mask 458 * 459 * Returns: 460 * Nothing 461 */ 462 void uma_set_align(int align); 463 464 /* 465 * Set a reserved number of items to hold for M_USE_RESERVE allocations. All 466 * other requests must allocate new backing pages. 467 */ 468 void uma_zone_reserve(uma_zone_t zone, int nitems); 469 470 /* 471 * Reserves the maximum KVA space required by the zone and configures the zone 472 * to use a VM_ALLOC_NOOBJ-based backend allocator. 473 * 474 * Arguments: 475 * zone The zone to update. 476 * nitems The upper limit on the number of items that can be allocated. 477 * 478 * Returns: 479 * 0 if KVA space can not be allocated 480 * 1 if successful 481 * 482 * Discussion: 483 * When the machine supports a direct map and the zone's items are smaller 484 * than a page, the zone will use the direct map instead of allocating KVA 485 * space. 486 */ 487 int uma_zone_reserve_kva(uma_zone_t zone, int nitems); 488 489 /* 490 * Sets a high limit on the number of items allowed in a zone 491 * 492 * Arguments: 493 * zone The zone to limit 494 * nitems The requested upper limit on the number of items allowed 495 * 496 * Returns: 497 * int The effective value of nitems 498 */ 499 int uma_zone_set_max(uma_zone_t zone, int nitems); 500 501 /* 502 * Sets a high limit on the number of items allowed in zone's bucket cache 503 * 504 * Arguments: 505 * zone The zone to limit 506 * nitems The requested upper limit on the number of items allowed 507 */ 508 void uma_zone_set_maxcache(uma_zone_t zone, int nitems); 509 510 /* 511 * Obtains the effective limit on the number of items in a zone 512 * 513 * Arguments: 514 * zone The zone to obtain the effective limit from 515 * 516 * Return: 517 * 0 No limit 518 * int The effective limit of the zone 519 */ 520 int uma_zone_get_max(uma_zone_t zone); 521 522 /* 523 * Sets a warning to be printed when limit is reached 524 * 525 * Arguments: 526 * zone The zone we will warn about 527 * warning Warning content 528 * 529 * Returns: 530 * Nothing 531 */ 532 void uma_zone_set_warning(uma_zone_t zone, const char *warning); 533 534 /* 535 * Sets a function to run when limit is reached 536 * 537 * Arguments: 538 * zone The zone to which this applies 539 * fx The function ro run 540 * 541 * Returns: 542 * Nothing 543 */ 544 typedef void (*uma_maxaction_t)(uma_zone_t, int); 545 void uma_zone_set_maxaction(uma_zone_t zone, uma_maxaction_t); 546 547 /* 548 * Obtains the approximate current number of items allocated from a zone 549 * 550 * Arguments: 551 * zone The zone to obtain the current allocation count from 552 * 553 * Return: 554 * int The approximate current number of items allocated from the zone 555 */ 556 int uma_zone_get_cur(uma_zone_t zone); 557 558 /* 559 * The following two routines (uma_zone_set_init/fini) 560 * are used to set the backend init/fini pair which acts on an 561 * object as it becomes allocated and is placed in a slab within 562 * the specified zone's backing keg. These should probably not 563 * be changed once allocations have already begun, but only be set 564 * immediately upon zone creation. 565 */ 566 void uma_zone_set_init(uma_zone_t zone, uma_init uminit); 567 void uma_zone_set_fini(uma_zone_t zone, uma_fini fini); 568 569 /* 570 * The following two routines (uma_zone_set_zinit/zfini) are 571 * used to set the zinit/zfini pair which acts on an object as 572 * it passes from the backing Keg's slab cache to the 573 * specified Zone's bucket cache. These should probably not 574 * be changed once allocations have already begun, but only be set 575 * immediately upon zone creation. 576 */ 577 void uma_zone_set_zinit(uma_zone_t zone, uma_init zinit); 578 void uma_zone_set_zfini(uma_zone_t zone, uma_fini zfini); 579 580 /* 581 * Replaces the standard backend allocator for this zone. 582 * 583 * Arguments: 584 * zone The zone whose backend allocator is being changed. 585 * allocf A pointer to the allocation function 586 * 587 * Returns: 588 * Nothing 589 * 590 * Discussion: 591 * This could be used to implement pageable allocation, or perhaps 592 * even DMA allocators if used in conjunction with the OFFPAGE 593 * zone flag. 594 */ 595 596 void uma_zone_set_allocf(uma_zone_t zone, uma_alloc allocf); 597 598 /* 599 * Used for freeing memory provided by the allocf above 600 * 601 * Arguments: 602 * zone The zone that intends to use this free routine. 603 * freef The page freeing routine. 604 * 605 * Returns: 606 * Nothing 607 */ 608 609 void uma_zone_set_freef(uma_zone_t zone, uma_free freef); 610 611 /* 612 * These flags are setable in the allocf and visible in the freef. 613 */ 614 #define UMA_SLAB_BOOT 0x01 /* Slab alloced from boot pages */ 615 #define UMA_SLAB_KERNEL 0x04 /* Slab alloced from kmem */ 616 #define UMA_SLAB_PRIV 0x08 /* Slab alloced from priv allocator */ 617 #define UMA_SLAB_OFFP 0x10 /* Slab is managed separately */ 618 /* 0x02, 0x40, and 0x80 are available */ 619 620 /* 621 * Used to pre-fill a zone with some number of items 622 * 623 * Arguments: 624 * zone The zone to fill 625 * itemcnt The number of items to reserve 626 * 627 * Returns: 628 * Nothing 629 * 630 * NOTE: This is blocking and should only be done at startup 631 */ 632 void uma_prealloc(uma_zone_t zone, int itemcnt); 633 634 /* 635 * Used to determine if a fixed-size zone is exhausted. 636 * 637 * Arguments: 638 * zone The zone to check 639 * 640 * Returns: 641 * Non-zero if zone is exhausted. 642 */ 643 int uma_zone_exhausted(uma_zone_t zone); 644 int uma_zone_exhausted_nolock(uma_zone_t zone); 645 646 /* 647 * Common UMA_ZONE_PCPU zones. 648 */ 649 extern uma_zone_t pcpu_zone_int; 650 extern uma_zone_t pcpu_zone_64; 651 652 /* 653 * Exported statistics structures to be used by user space monitoring tools. 654 * Statistics stream consists of a uma_stream_header, followed by a series of 655 * alternative uma_type_header and uma_type_stat structures. 656 */ 657 #define UMA_STREAM_VERSION 0x00000001 658 struct uma_stream_header { 659 uint32_t ush_version; /* Stream format version. */ 660 uint32_t ush_maxcpus; /* Value of MAXCPU for stream. */ 661 uint32_t ush_count; /* Number of records. */ 662 uint32_t _ush_pad; /* Pad/reserved field. */ 663 }; 664 665 #define UTH_MAX_NAME 32 666 #define UTH_ZONE_SECONDARY 0x00000001 667 struct uma_type_header { 668 /* 669 * Static per-zone data, some extracted from the supporting keg. 670 */ 671 char uth_name[UTH_MAX_NAME]; 672 uint32_t uth_align; /* Keg: alignment. */ 673 uint32_t uth_size; /* Keg: requested size of item. */ 674 uint32_t uth_rsize; /* Keg: real size of item. */ 675 uint32_t uth_maxpages; /* Keg: maximum number of pages. */ 676 uint32_t uth_limit; /* Keg: max items to allocate. */ 677 678 /* 679 * Current dynamic zone/keg-derived statistics. 680 */ 681 uint32_t uth_pages; /* Keg: pages allocated. */ 682 uint32_t uth_keg_free; /* Keg: items free. */ 683 uint32_t uth_zone_free; /* Zone: items free. */ 684 uint32_t uth_bucketsize; /* Zone: desired bucket size. */ 685 uint32_t uth_zone_flags; /* Zone: flags. */ 686 uint64_t uth_allocs; /* Zone: number of allocations. */ 687 uint64_t uth_frees; /* Zone: number of frees. */ 688 uint64_t uth_fails; /* Zone: number of alloc failures. */ 689 uint64_t uth_sleeps; /* Zone: number of alloc sleeps. */ 690 uint64_t uth_xdomain; /* Zone: Number of cross domain frees. */ 691 uint64_t _uth_reserved1[1]; /* Reserved. */ 692 }; 693 694 struct uma_percpu_stat { 695 uint64_t ups_allocs; /* Cache: number of allocations. */ 696 uint64_t ups_frees; /* Cache: number of frees. */ 697 uint64_t ups_cache_free; /* Cache: free items in cache. */ 698 uint64_t _ups_reserved[5]; /* Reserved. */ 699 }; 700 701 void uma_reclaim_wakeup(void); 702 void uma_reclaim_worker(void *); 703 704 unsigned long uma_limit(void); 705 706 /* Return the amount of memory managed by UMA. */ 707 unsigned long uma_size(void); 708 709 /* Return the amount of memory remaining. May be negative. */ 710 long uma_avail(void); 711 712 #endif /* _VM_UMA_H_ */ 713