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 * Add a second master to a secondary zone. This provides multiple data 222 * backends for objects with the same size. Both masters must have 223 * compatible allocation flags. Presently, UMA_ZONE_MALLOC type zones are 224 * the only supported. 225 * 226 * Returns: 227 * Error on failure, 0 on success. 228 */ 229 int uma_zsecond_add(uma_zone_t zone, uma_zone_t master); 230 231 /* 232 * Create cache-only zones. 233 * 234 * This allows uma's per-cpu cache facilities to handle arbitrary 235 * pointers. Consumers must specify the import and release functions to 236 * fill and destroy caches. UMA does not allocate any memory for these 237 * zones. The 'arg' parameter is passed to import/release and is caller 238 * specific. 239 */ 240 uma_zone_t uma_zcache_create(char *name, int size, uma_ctor ctor, uma_dtor dtor, 241 uma_init zinit, uma_fini zfini, uma_import zimport, 242 uma_release zrelease, void *arg, int flags); 243 244 /* 245 * Definitions for uma_zcreate flags 246 * 247 * These flags share space with UMA_ZFLAGs in uma_int.h. Be careful not to 248 * overlap when adding new features. 0xff000000 is in use by uma_int.h. 249 */ 250 #define UMA_ZONE_PAGEABLE 0x0001 /* Return items not fully backed by 251 physical memory XXX Not yet */ 252 #define UMA_ZONE_ZINIT 0x0002 /* Initialize with zeros */ 253 #define UMA_ZONE_STATIC 0x0004 /* Statically sized zone */ 254 #define UMA_ZONE_OFFPAGE 0x0008 /* Force the slab structure allocation 255 off of the real memory */ 256 #define UMA_ZONE_MALLOC 0x0010 /* For use by malloc(9) only! */ 257 #define UMA_ZONE_NOFREE 0x0020 /* Do not free slabs of this type! */ 258 #define UMA_ZONE_MTXCLASS 0x0040 /* Create a new lock class */ 259 #define UMA_ZONE_VM 0x0080 /* 260 * Used for internal vm datastructures 261 * only. 262 */ 263 #define UMA_ZONE_HASH 0x0100 /* 264 * Use a hash table instead of caching 265 * information in the vm_page. 266 */ 267 #define UMA_ZONE_SECONDARY 0x0200 /* Zone is a Secondary Zone */ 268 /* 0x0400 Unused */ 269 #define UMA_ZONE_MAXBUCKET 0x0800 /* Use largest buckets */ 270 #define UMA_ZONE_CACHESPREAD 0x1000 /* 271 * Spread memory start locations across 272 * all possible cache lines. May 273 * require many virtually contiguous 274 * backend pages and can fail early. 275 */ 276 #define UMA_ZONE_VTOSLAB 0x2000 /* Zone uses vtoslab for lookup. */ 277 #define UMA_ZONE_NODUMP 0x4000 /* 278 * Zone's pages will not be included in 279 * mini-dumps. 280 */ 281 #define UMA_ZONE_PCPU 0x8000 /* 282 * Allocates mp_maxid + 1 slabs sized to 283 * sizeof(struct pcpu). 284 */ 285 #define UMA_ZONE_NUMA 0x10000 /* 286 * NUMA aware Zone. Implements a best 287 * effort first-touch policy. 288 */ 289 290 /* 291 * These flags are shared between the keg and zone. In zones wishing to add 292 * new kegs these flags must be compatible. Some are determined based on 293 * physical parameters of the request and may not be provided by the consumer. 294 */ 295 #define UMA_ZONE_INHERIT \ 296 (UMA_ZONE_OFFPAGE | UMA_ZONE_MALLOC | UMA_ZONE_NOFREE | \ 297 UMA_ZONE_HASH | UMA_ZONE_VTOSLAB | UMA_ZONE_PCPU) 298 299 /* Definitions for align */ 300 #define UMA_ALIGN_PTR (sizeof(void *) - 1) /* Alignment fit for ptr */ 301 #define UMA_ALIGN_LONG (sizeof(long) - 1) /* "" long */ 302 #define UMA_ALIGN_INT (sizeof(int) - 1) /* "" int */ 303 #define UMA_ALIGN_SHORT (sizeof(short) - 1) /* "" short */ 304 #define UMA_ALIGN_CHAR (sizeof(char) - 1) /* "" char */ 305 #define UMA_ALIGN_CACHE (0 - 1) /* Cache line size align */ 306 #define UMA_ALIGNOF(type) (_Alignof(type) - 1) /* Alignment fit for 'type' */ 307 308 /* 309 * Destroys an empty uma zone. If the zone is not empty uma complains loudly. 310 * 311 * Arguments: 312 * zone The zone we want to destroy. 313 * 314 */ 315 void uma_zdestroy(uma_zone_t zone); 316 317 /* 318 * Allocates an item out of a zone 319 * 320 * Arguments: 321 * zone The zone we are allocating from 322 * arg This data is passed to the ctor function 323 * flags See sys/malloc.h for available flags. 324 * 325 * Returns: 326 * A non-null pointer to an initialized element from the zone is 327 * guaranteed if the wait flag is M_WAITOK. Otherwise a null pointer 328 * may be returned if the zone is empty or the ctor failed. 329 */ 330 331 void *uma_zalloc_arg(uma_zone_t zone, void *arg, int flags); 332 333 /* 334 * Allocate an item from a specific NUMA domain. This uses a slow path in 335 * the allocator but is guaranteed to allocate memory from the requested 336 * domain if M_WAITOK is set. 337 * 338 * Arguments: 339 * zone The zone we are allocating from 340 * arg This data is passed to the ctor function 341 * domain The domain to allocate from. 342 * flags See sys/malloc.h for available flags. 343 */ 344 void *uma_zalloc_domain(uma_zone_t zone, void *arg, int domain, int flags); 345 346 /* 347 * Allocates an item out of a zone without supplying an argument 348 * 349 * This is just a wrapper for uma_zalloc_arg for convenience. 350 * 351 */ 352 static __inline void *uma_zalloc(uma_zone_t zone, int flags); 353 354 static __inline void * 355 uma_zalloc(uma_zone_t zone, int flags) 356 { 357 return uma_zalloc_arg(zone, NULL, flags); 358 } 359 360 /* 361 * Frees an item back into the specified zone. 362 * 363 * Arguments: 364 * zone The zone the item was originally allocated out of. 365 * item The memory to be freed. 366 * arg Argument passed to the destructor 367 * 368 * Returns: 369 * Nothing. 370 */ 371 372 void uma_zfree_arg(uma_zone_t zone, void *item, void *arg); 373 374 /* 375 * Frees an item back to the specified zone's domain specific pool. 376 * 377 * Arguments: 378 * zone The zone the item was originally allocated out of. 379 * item The memory to be freed. 380 * arg Argument passed to the destructor 381 */ 382 void uma_zfree_domain(uma_zone_t zone, void *item, void *arg); 383 384 /* 385 * Frees an item back to a zone without supplying an argument 386 * 387 * This is just a wrapper for uma_zfree_arg for convenience. 388 * 389 */ 390 static __inline void uma_zfree(uma_zone_t zone, void *item); 391 392 static __inline void 393 uma_zfree(uma_zone_t zone, void *item) 394 { 395 uma_zfree_arg(zone, item, NULL); 396 } 397 398 /* 399 * Wait until the specified zone can allocate an item. 400 */ 401 void uma_zwait(uma_zone_t zone); 402 403 /* 404 * Backend page supplier routines 405 * 406 * Arguments: 407 * zone The zone that is requesting pages. 408 * size The number of bytes being requested. 409 * pflag Flags for these memory pages, see below. 410 * domain The NUMA domain that we prefer for this allocation. 411 * wait Indicates our willingness to block. 412 * 413 * Returns: 414 * A pointer to the allocated memory or NULL on failure. 415 */ 416 417 typedef void *(*uma_alloc)(uma_zone_t zone, vm_size_t size, int domain, 418 uint8_t *pflag, int wait); 419 420 /* 421 * Backend page free routines 422 * 423 * Arguments: 424 * item A pointer to the previously allocated pages. 425 * size The original size of the allocation. 426 * pflag The flags for the slab. See UMA_SLAB_* below. 427 * 428 * Returns: 429 * None 430 */ 431 typedef void (*uma_free)(void *item, vm_size_t size, uint8_t pflag); 432 433 /* 434 * Reclaims unused memory for all zones 435 * 436 * Arguments: 437 * None 438 * Returns: 439 * None 440 * 441 * This should only be called by the page out daemon. 442 */ 443 444 void uma_reclaim(void); 445 446 /* 447 * Sets the alignment mask to be used for all zones requesting cache 448 * alignment. Should be called by MD boot code prior to starting VM/UMA. 449 * 450 * Arguments: 451 * align The alignment mask 452 * 453 * Returns: 454 * Nothing 455 */ 456 void uma_set_align(int align); 457 458 /* 459 * Set a reserved number of items to hold for M_USE_RESERVE allocations. All 460 * other requests must allocate new backing pages. 461 */ 462 void uma_zone_reserve(uma_zone_t zone, int nitems); 463 464 /* 465 * Reserves the maximum KVA space required by the zone and configures the zone 466 * to use a VM_ALLOC_NOOBJ-based backend allocator. 467 * 468 * Arguments: 469 * zone The zone to update. 470 * nitems The upper limit on the number of items that can be allocated. 471 * 472 * Returns: 473 * 0 if KVA space can not be allocated 474 * 1 if successful 475 * 476 * Discussion: 477 * When the machine supports a direct map and the zone's items are smaller 478 * than a page, the zone will use the direct map instead of allocating KVA 479 * space. 480 */ 481 int uma_zone_reserve_kva(uma_zone_t zone, int nitems); 482 483 /* 484 * Sets a high limit on the number of items allowed in a zone 485 * 486 * Arguments: 487 * zone The zone to limit 488 * nitems The requested upper limit on the number of items allowed 489 * 490 * Returns: 491 * int The effective value of nitems after rounding up based on page size 492 */ 493 int uma_zone_set_max(uma_zone_t zone, int nitems); 494 495 /* 496 * Obtains the effective limit on the number of items in a zone 497 * 498 * Arguments: 499 * zone The zone to obtain the effective limit from 500 * 501 * Return: 502 * 0 No limit 503 * int The effective limit of the zone 504 */ 505 int uma_zone_get_max(uma_zone_t zone); 506 507 /* 508 * Sets a warning to be printed when limit is reached 509 * 510 * Arguments: 511 * zone The zone we will warn about 512 * warning Warning content 513 * 514 * Returns: 515 * Nothing 516 */ 517 void uma_zone_set_warning(uma_zone_t zone, const char *warning); 518 519 /* 520 * Sets a function to run when limit is reached 521 * 522 * Arguments: 523 * zone The zone to which this applies 524 * fx The function ro run 525 * 526 * Returns: 527 * Nothing 528 */ 529 typedef void (*uma_maxaction_t)(uma_zone_t, int); 530 void uma_zone_set_maxaction(uma_zone_t zone, uma_maxaction_t); 531 532 /* 533 * Obtains the approximate current number of items allocated from a zone 534 * 535 * Arguments: 536 * zone The zone to obtain the current allocation count from 537 * 538 * Return: 539 * int The approximate current number of items allocated from the zone 540 */ 541 int uma_zone_get_cur(uma_zone_t zone); 542 543 /* 544 * The following two routines (uma_zone_set_init/fini) 545 * are used to set the backend init/fini pair which acts on an 546 * object as it becomes allocated and is placed in a slab within 547 * the specified zone's backing keg. These should probably not 548 * be changed once allocations have already begun, but only be set 549 * immediately upon zone creation. 550 */ 551 void uma_zone_set_init(uma_zone_t zone, uma_init uminit); 552 void uma_zone_set_fini(uma_zone_t zone, uma_fini fini); 553 554 /* 555 * The following two routines (uma_zone_set_zinit/zfini) are 556 * used to set the zinit/zfini pair which acts on an object as 557 * it passes from the backing Keg's slab cache to the 558 * specified Zone's bucket cache. These should probably not 559 * be changed once allocations have already begun, but only be set 560 * immediately upon zone creation. 561 */ 562 void uma_zone_set_zinit(uma_zone_t zone, uma_init zinit); 563 void uma_zone_set_zfini(uma_zone_t zone, uma_fini zfini); 564 565 /* 566 * Replaces the standard backend allocator for this zone. 567 * 568 * Arguments: 569 * zone The zone whose backend allocator is being changed. 570 * allocf A pointer to the allocation function 571 * 572 * Returns: 573 * Nothing 574 * 575 * Discussion: 576 * This could be used to implement pageable allocation, or perhaps 577 * even DMA allocators if used in conjunction with the OFFPAGE 578 * zone flag. 579 */ 580 581 void uma_zone_set_allocf(uma_zone_t zone, uma_alloc allocf); 582 583 /* 584 * Used for freeing memory provided by the allocf above 585 * 586 * Arguments: 587 * zone The zone that intends to use this free routine. 588 * freef The page freeing routine. 589 * 590 * Returns: 591 * Nothing 592 */ 593 594 void uma_zone_set_freef(uma_zone_t zone, uma_free freef); 595 596 /* 597 * These flags are setable in the allocf and visible in the freef. 598 */ 599 #define UMA_SLAB_BOOT 0x01 /* Slab alloced from boot pages */ 600 #define UMA_SLAB_KERNEL 0x04 /* Slab alloced from kernel_map */ 601 #define UMA_SLAB_PRIV 0x08 /* Slab alloced from priv allocator */ 602 #define UMA_SLAB_OFFP 0x10 /* Slab is managed separately */ 603 #define UMA_SLAB_MALLOC 0x20 /* Slab is a large malloc slab */ 604 /* 0x02, 0x40 and 0x80 are available */ 605 606 /* 607 * Used to pre-fill a zone with some number of items 608 * 609 * Arguments: 610 * zone The zone to fill 611 * itemcnt The number of items to reserve 612 * 613 * Returns: 614 * Nothing 615 * 616 * NOTE: This is blocking and should only be done at startup 617 */ 618 void uma_prealloc(uma_zone_t zone, int itemcnt); 619 620 /* 621 * Used to determine if a fixed-size zone is exhausted. 622 * 623 * Arguments: 624 * zone The zone to check 625 * 626 * Returns: 627 * Non-zero if zone is exhausted. 628 */ 629 int uma_zone_exhausted(uma_zone_t zone); 630 int uma_zone_exhausted_nolock(uma_zone_t zone); 631 632 /* 633 * Common UMA_ZONE_PCPU zones. 634 */ 635 extern uma_zone_t pcpu_zone_64; 636 extern uma_zone_t pcpu_zone_ptr; 637 638 /* 639 * Exported statistics structures to be used by user space monitoring tools. 640 * Statistics stream consists of a uma_stream_header, followed by a series of 641 * alternative uma_type_header and uma_type_stat structures. 642 */ 643 #define UMA_STREAM_VERSION 0x00000001 644 struct uma_stream_header { 645 uint32_t ush_version; /* Stream format version. */ 646 uint32_t ush_maxcpus; /* Value of MAXCPU for stream. */ 647 uint32_t ush_count; /* Number of records. */ 648 uint32_t _ush_pad; /* Pad/reserved field. */ 649 }; 650 651 #define UTH_MAX_NAME 32 652 #define UTH_ZONE_SECONDARY 0x00000001 653 struct uma_type_header { 654 /* 655 * Static per-zone data, some extracted from the supporting keg. 656 */ 657 char uth_name[UTH_MAX_NAME]; 658 uint32_t uth_align; /* Keg: alignment. */ 659 uint32_t uth_size; /* Keg: requested size of item. */ 660 uint32_t uth_rsize; /* Keg: real size of item. */ 661 uint32_t uth_maxpages; /* Keg: maximum number of pages. */ 662 uint32_t uth_limit; /* Keg: max items to allocate. */ 663 664 /* 665 * Current dynamic zone/keg-derived statistics. 666 */ 667 uint32_t uth_pages; /* Keg: pages allocated. */ 668 uint32_t uth_keg_free; /* Keg: items free. */ 669 uint32_t uth_zone_free; /* Zone: items free. */ 670 uint32_t uth_bucketsize; /* Zone: desired bucket size. */ 671 uint32_t uth_zone_flags; /* Zone: flags. */ 672 uint64_t uth_allocs; /* Zone: number of allocations. */ 673 uint64_t uth_frees; /* Zone: number of frees. */ 674 uint64_t uth_fails; /* Zone: number of alloc failures. */ 675 uint64_t uth_sleeps; /* Zone: number of alloc sleeps. */ 676 uint64_t _uth_reserved1[2]; /* Reserved. */ 677 }; 678 679 struct uma_percpu_stat { 680 uint64_t ups_allocs; /* Cache: number of allocations. */ 681 uint64_t ups_frees; /* Cache: number of frees. */ 682 uint64_t ups_cache_free; /* Cache: free items in cache. */ 683 uint64_t _ups_reserved[5]; /* Reserved. */ 684 }; 685 686 void uma_reclaim_wakeup(void); 687 void uma_reclaim_worker(void *); 688 689 unsigned long uma_limit(void); 690 691 /* Return the amount of memory managed by UMA. */ 692 unsigned long uma_size(void); 693 694 /* Return the amount of memory remaining. May be negative. */ 695 long uma_avail(void); 696 697 #endif /* _VM_UMA_H_ */ 698