1 /*- 2 * Copyright (c) 2002, 2003, 2004, 2005 Jeffrey Roberson <jeff@FreeBSD.org> 3 * Copyright (c) 2004, 2005 Bosko Milekic <bmilekic@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice unmodified, this list of conditions, and the following 11 * disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 * 29 */ 30 31 /* 32 * uma.h - External definitions for the Universal Memory Allocator 33 * 34 */ 35 36 #ifndef _VM_UMA_H_ 37 #define _VM_UMA_H_ 38 39 #include <sys/param.h> /* For NULL */ 40 #include <sys/malloc.h> /* For M_* */ 41 42 /* User visible parameters */ 43 #define UMA_SMALLEST_UNIT (PAGE_SIZE / 256) /* Smallest item allocated */ 44 45 /* Types and type defs */ 46 47 struct uma_zone; 48 /* Opaque type used as a handle to the zone */ 49 typedef struct uma_zone * uma_zone_t; 50 51 void zone_drain(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 flags); 130 131 /* 132 * Free memory from a cache zone. 133 */ 134 typedef void (*uma_release)(void *arg, void **store, int count); 135 136 /* 137 * What's the difference between initializing and constructing? 138 * 139 * The item is initialized when it is cached, and this is the state that the 140 * object should be in when returned to the allocator. The purpose of this is 141 * to remove some code which would otherwise be called on each allocation by 142 * utilizing a known, stable state. This differs from the constructor which 143 * will be called on EVERY allocation. 144 * 145 * For example, in the initializer you may want to initialize embedded locks, 146 * NULL list pointers, set up initial states, magic numbers, etc. This way if 147 * the object is held in the allocator and re-used it won't be necessary to 148 * re-initialize it. 149 * 150 * The constructor may be used to lock a data structure, link it on to lists, 151 * bump reference counts or total counts of outstanding structures, etc. 152 * 153 */ 154 155 156 /* Function proto types */ 157 158 /* 159 * Create a new uma zone 160 * 161 * Arguments: 162 * name The text name of the zone for debugging and stats. This memory 163 * should not be freed until the zone has been deallocated. 164 * size The size of the object that is being created. 165 * ctor The constructor that is called when the object is allocated. 166 * dtor The destructor that is called when the object is freed. 167 * init An initializer that sets up the initial state of the memory. 168 * fini A discard function that undoes initialization done by init. 169 * ctor/dtor/init/fini may all be null, see notes above. 170 * align A bitmask that corresponds to the requested alignment 171 * eg 4 would be 0x3 172 * flags A set of parameters that control the behavior of the zone. 173 * 174 * Returns: 175 * A pointer to a structure which is intended to be opaque to users of 176 * the interface. The value may be null if the wait flag is not set. 177 */ 178 uma_zone_t uma_zcreate(const char *name, size_t size, uma_ctor ctor, 179 uma_dtor dtor, uma_init uminit, uma_fini fini, 180 int align, uint32_t flags); 181 182 /* 183 * Create a secondary uma zone 184 * 185 * Arguments: 186 * name The text name of the zone for debugging and stats. This memory 187 * should not be freed until the zone has been deallocated. 188 * ctor The constructor that is called when the object is allocated. 189 * dtor The destructor that is called when the object is freed. 190 * zinit An initializer that sets up the initial state of the memory 191 * as the object passes from the Keg's slab to the Zone's cache. 192 * zfini A discard function that undoes initialization done by init 193 * as the object passes from the Zone's cache to the Keg's slab. 194 * 195 * ctor/dtor/zinit/zfini may all be null, see notes above. 196 * Note that the zinit and zfini specified here are NOT 197 * exactly the same as the init/fini specified to uma_zcreate() 198 * when creating a master zone. These zinit/zfini are called 199 * on the TRANSITION from keg to zone (and vice-versa). Once 200 * these are set, the primary zone may alter its init/fini 201 * (which are called when the object passes from VM to keg) 202 * using uma_zone_set_init/fini()) as well as its own 203 * zinit/zfini (unset by default for master zone) with 204 * uma_zone_set_zinit/zfini() (note subtle 'z' prefix). 205 * 206 * master A reference to this zone's Master Zone (Primary Zone), 207 * which contains the backing Keg for the Secondary Zone 208 * being added. 209 * 210 * Returns: 211 * A pointer to a structure which is intended to be opaque to users of 212 * the interface. The value may be null if the wait flag is not set. 213 */ 214 uma_zone_t uma_zsecond_create(char *name, uma_ctor ctor, uma_dtor dtor, 215 uma_init zinit, uma_fini zfini, uma_zone_t master); 216 217 /* 218 * Add a second master to a secondary zone. This provides multiple data 219 * backends for objects with the same size. Both masters must have 220 * compatible allocation flags. Presently, UMA_ZONE_MALLOC type zones are 221 * the only supported. 222 * 223 * Returns: 224 * Error on failure, 0 on success. 225 */ 226 int uma_zsecond_add(uma_zone_t zone, uma_zone_t master); 227 228 /* 229 * Create cache-only zones. 230 * 231 * This allows uma's per-cpu cache facilities to handle arbitrary 232 * pointers. Consumers must specify the import and release functions to 233 * fill and destroy caches. UMA does not allocate any memory for these 234 * zones. The 'arg' parameter is passed to import/release and is caller 235 * specific. 236 */ 237 uma_zone_t uma_zcache_create(char *name, int size, uma_ctor ctor, uma_dtor dtor, 238 uma_init zinit, uma_fini zfini, uma_import zimport, 239 uma_release zrelease, void *arg, int flags); 240 241 /* 242 * Definitions for uma_zcreate flags 243 * 244 * These flags share space with UMA_ZFLAGs in uma_int.h. Be careful not to 245 * overlap when adding new features. 0xf0000000 is in use by uma_int.h. 246 */ 247 #define UMA_ZONE_PAGEABLE 0x0001 /* Return items not fully backed by 248 physical memory XXX Not yet */ 249 #define UMA_ZONE_ZINIT 0x0002 /* Initialize with zeros */ 250 #define UMA_ZONE_STATIC 0x0004 /* Statically sized zone */ 251 #define UMA_ZONE_OFFPAGE 0x0008 /* Force the slab structure allocation 252 off of the real memory */ 253 #define UMA_ZONE_MALLOC 0x0010 /* For use by malloc(9) only! */ 254 #define UMA_ZONE_NOFREE 0x0020 /* Do not free slabs of this type! */ 255 #define UMA_ZONE_MTXCLASS 0x0040 /* Create a new lock class */ 256 #define UMA_ZONE_VM 0x0080 /* 257 * Used for internal vm datastructures 258 * only. 259 */ 260 #define UMA_ZONE_HASH 0x0100 /* 261 * Use a hash table instead of caching 262 * information in the vm_page. 263 */ 264 #define UMA_ZONE_SECONDARY 0x0200 /* Zone is a Secondary Zone */ 265 #define UMA_ZONE_REFCNT 0x0400 /* Allocate refcnts in slabs */ 266 #define UMA_ZONE_MAXBUCKET 0x0800 /* Use largest buckets */ 267 #define UMA_ZONE_CACHESPREAD 0x1000 /* 268 * Spread memory start locations across 269 * all possible cache lines. May 270 * require many virtually contiguous 271 * backend pages and can fail early. 272 */ 273 #define UMA_ZONE_VTOSLAB 0x2000 /* Zone uses vtoslab for lookup. */ 274 #define UMA_ZONE_NODUMP 0x4000 /* 275 * Zone's pages will not be included in 276 * mini-dumps. 277 */ 278 #define UMA_ZONE_PCPU 0x8000 /* 279 * Allocates mp_ncpus slabs sized to 280 * sizeof(struct pcpu). 281 */ 282 283 /* 284 * These flags are shared between the keg and zone. In zones wishing to add 285 * new kegs these flags must be compatible. Some are determined based on 286 * physical parameters of the request and may not be provided by the consumer. 287 */ 288 #define UMA_ZONE_INHERIT \ 289 (UMA_ZONE_OFFPAGE | UMA_ZONE_MALLOC | UMA_ZONE_NOFREE | \ 290 UMA_ZONE_HASH | UMA_ZONE_REFCNT | UMA_ZONE_VTOSLAB | UMA_ZONE_PCPU) 291 292 /* Definitions for align */ 293 #define UMA_ALIGN_PTR (sizeof(void *) - 1) /* Alignment fit for ptr */ 294 #define UMA_ALIGN_LONG (sizeof(long) - 1) /* "" long */ 295 #define UMA_ALIGN_INT (sizeof(int) - 1) /* "" int */ 296 #define UMA_ALIGN_SHORT (sizeof(short) - 1) /* "" short */ 297 #define UMA_ALIGN_CHAR (sizeof(char) - 1) /* "" char */ 298 #define UMA_ALIGN_CACHE (0 - 1) /* Cache line size align */ 299 300 /* 301 * Destroys an empty uma zone. If the zone is not empty uma complains loudly. 302 * 303 * Arguments: 304 * zone The zone we want to destroy. 305 * 306 */ 307 void uma_zdestroy(uma_zone_t zone); 308 309 /* 310 * Allocates an item out of a zone 311 * 312 * Arguments: 313 * zone The zone we are allocating from 314 * arg This data is passed to the ctor function 315 * flags See sys/malloc.h for available flags. 316 * 317 * Returns: 318 * A non-null pointer to an initialized element from the zone is 319 * guaranteed if the wait flag is M_WAITOK. Otherwise a null pointer 320 * may be returned if the zone is empty or the ctor failed. 321 */ 322 323 void *uma_zalloc_arg(uma_zone_t zone, void *arg, int flags); 324 325 /* 326 * Allocates an item out of a zone without supplying an argument 327 * 328 * This is just a wrapper for uma_zalloc_arg for convenience. 329 * 330 */ 331 static __inline void *uma_zalloc(uma_zone_t zone, int flags); 332 333 static __inline void * 334 uma_zalloc(uma_zone_t zone, int flags) 335 { 336 return uma_zalloc_arg(zone, NULL, flags); 337 } 338 339 /* 340 * Frees an item back into the specified zone. 341 * 342 * Arguments: 343 * zone The zone the item was originally allocated out of. 344 * item The memory to be freed. 345 * arg Argument passed to the destructor 346 * 347 * Returns: 348 * Nothing. 349 */ 350 351 void uma_zfree_arg(uma_zone_t zone, void *item, void *arg); 352 353 /* 354 * Frees an item back to a zone without supplying an argument 355 * 356 * This is just a wrapper for uma_zfree_arg for convenience. 357 * 358 */ 359 static __inline void uma_zfree(uma_zone_t zone, void *item); 360 361 static __inline void 362 uma_zfree(uma_zone_t zone, void *item) 363 { 364 uma_zfree_arg(zone, item, NULL); 365 } 366 367 /* 368 * XXX The rest of the prototypes in this header are h0h0 magic for the VM. 369 * If you think you need to use it for a normal zone you're probably incorrect. 370 */ 371 372 /* 373 * Backend page supplier routines 374 * 375 * Arguments: 376 * zone The zone that is requesting pages. 377 * size The number of bytes being requested. 378 * pflag Flags for these memory pages, see below. 379 * wait Indicates our willingness to block. 380 * 381 * Returns: 382 * A pointer to the allocated memory or NULL on failure. 383 */ 384 385 typedef void *(*uma_alloc)(uma_zone_t zone, vm_size_t size, uint8_t *pflag, 386 int wait); 387 388 /* 389 * Backend page free routines 390 * 391 * Arguments: 392 * item A pointer to the previously allocated pages. 393 * size The original size of the allocation. 394 * pflag The flags for the slab. See UMA_SLAB_* below. 395 * 396 * Returns: 397 * None 398 */ 399 typedef void (*uma_free)(void *item, vm_size_t size, uint8_t pflag); 400 401 402 403 /* 404 * Sets up the uma allocator. (Called by vm_mem_init) 405 * 406 * Arguments: 407 * bootmem A pointer to memory used to bootstrap the system. 408 * 409 * Returns: 410 * Nothing 411 * 412 * Discussion: 413 * This memory is used for zones which allocate things before the 414 * backend page supplier can give us pages. It should be 415 * UMA_SLAB_SIZE * boot_pages bytes. (see uma_int.h) 416 * 417 */ 418 419 void uma_startup(void *bootmem, int boot_pages); 420 421 /* 422 * Finishes starting up the allocator. This should 423 * be called when kva is ready for normal allocs. 424 * 425 * Arguments: 426 * None 427 * 428 * Returns: 429 * Nothing 430 * 431 * Discussion: 432 * uma_startup2 is called by kmeminit() to enable us of uma for malloc. 433 */ 434 435 void uma_startup2(void); 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 * Obtains the effective limit on the number of items in a zone 501 * 502 * Arguments: 503 * zone The zone to obtain the effective limit from 504 * 505 * Return: 506 * 0 No limit 507 * int The effective limit of the zone 508 */ 509 int uma_zone_get_max(uma_zone_t zone); 510 511 /* 512 * Sets a warning to be printed when limit is reached 513 * 514 * Arguments: 515 * zone The zone we will warn about 516 * warning Warning content 517 * 518 * Returns: 519 * Nothing 520 */ 521 void uma_zone_set_warning(uma_zone_t zone, const char *warning); 522 523 /* 524 * Obtains the approximate current number of items allocated from a zone 525 * 526 * Arguments: 527 * zone The zone to obtain the current allocation count from 528 * 529 * Return: 530 * int The approximate current number of items allocated from the zone 531 */ 532 int uma_zone_get_cur(uma_zone_t zone); 533 534 /* 535 * The following two routines (uma_zone_set_init/fini) 536 * are used to set the backend init/fini pair which acts on an 537 * object as it becomes allocated and is placed in a slab within 538 * the specified zone's backing keg. These should probably not 539 * be changed once allocations have already begun, but only be set 540 * immediately upon zone creation. 541 */ 542 void uma_zone_set_init(uma_zone_t zone, uma_init uminit); 543 void uma_zone_set_fini(uma_zone_t zone, uma_fini fini); 544 545 /* 546 * The following two routines (uma_zone_set_zinit/zfini) are 547 * used to set the zinit/zfini pair which acts on an object as 548 * it passes from the backing Keg's slab cache to the 549 * specified Zone's bucket cache. These should probably not 550 * be changed once allocations have already begun, but only be set 551 * immediately upon zone creation. 552 */ 553 void uma_zone_set_zinit(uma_zone_t zone, uma_init zinit); 554 void uma_zone_set_zfini(uma_zone_t zone, uma_fini zfini); 555 556 /* 557 * Replaces the standard backend allocator for this zone. 558 * 559 * Arguments: 560 * zone The zone whose backend allocator is being changed. 561 * allocf A pointer to the allocation function 562 * 563 * Returns: 564 * Nothing 565 * 566 * Discussion: 567 * This could be used to implement pageable allocation, or perhaps 568 * even DMA allocators if used in conjunction with the OFFPAGE 569 * zone flag. 570 */ 571 572 void uma_zone_set_allocf(uma_zone_t zone, uma_alloc allocf); 573 574 /* 575 * Used for freeing memory provided by the allocf above 576 * 577 * Arguments: 578 * zone The zone that intends to use this free routine. 579 * freef The page freeing routine. 580 * 581 * Returns: 582 * Nothing 583 */ 584 585 void uma_zone_set_freef(uma_zone_t zone, uma_free freef); 586 587 /* 588 * These flags are setable in the allocf and visible in the freef. 589 */ 590 #define UMA_SLAB_BOOT 0x01 /* Slab alloced from boot pages */ 591 #define UMA_SLAB_KMEM 0x02 /* Slab alloced from kmem_map */ 592 #define UMA_SLAB_KERNEL 0x04 /* Slab alloced from kernel_map */ 593 #define UMA_SLAB_PRIV 0x08 /* Slab alloced from priv allocator */ 594 #define UMA_SLAB_OFFP 0x10 /* Slab is managed separately */ 595 #define UMA_SLAB_MALLOC 0x20 /* Slab is a large malloc slab */ 596 /* 0x40 and 0x80 are available */ 597 598 /* 599 * Used to pre-fill a zone with some number of items 600 * 601 * Arguments: 602 * zone The zone to fill 603 * itemcnt The number of items to reserve 604 * 605 * Returns: 606 * Nothing 607 * 608 * NOTE: This is blocking and should only be done at startup 609 */ 610 void uma_prealloc(uma_zone_t zone, int itemcnt); 611 612 /* 613 * Used to lookup the reference counter allocated for an item 614 * from a UMA_ZONE_REFCNT zone. For UMA_ZONE_REFCNT zones, 615 * reference counters are allocated for items and stored in 616 * the underlying slab header. 617 * 618 * Arguments: 619 * zone The UMA_ZONE_REFCNT zone to which the item belongs. 620 * item The address of the item for which we want a refcnt. 621 * 622 * Returns: 623 * A pointer to a uint32_t reference counter. 624 */ 625 uint32_t *uma_find_refcnt(uma_zone_t zone, void *item); 626 627 /* 628 * Used to determine if a fixed-size zone is exhausted. 629 * 630 * Arguments: 631 * zone The zone to check 632 * 633 * Returns: 634 * Non-zero if zone is exhausted. 635 */ 636 int uma_zone_exhausted(uma_zone_t zone); 637 int uma_zone_exhausted_nolock(uma_zone_t zone); 638 639 /* 640 * Common UMA_ZONE_PCPU zones. 641 */ 642 extern uma_zone_t pcpu_zone_64; 643 extern uma_zone_t pcpu_zone_ptr; 644 645 /* 646 * Exported statistics structures to be used by user space monitoring tools. 647 * Statistics stream consists of a uma_stream_header, followed by a series of 648 * alternative uma_type_header and uma_type_stat structures. 649 */ 650 #define UMA_STREAM_VERSION 0x00000001 651 struct uma_stream_header { 652 uint32_t ush_version; /* Stream format version. */ 653 uint32_t ush_maxcpus; /* Value of MAXCPU for stream. */ 654 uint32_t ush_count; /* Number of records. */ 655 uint32_t _ush_pad; /* Pad/reserved field. */ 656 }; 657 658 #define UTH_MAX_NAME 32 659 #define UTH_ZONE_SECONDARY 0x00000001 660 struct uma_type_header { 661 /* 662 * Static per-zone data, some extracted from the supporting keg. 663 */ 664 char uth_name[UTH_MAX_NAME]; 665 uint32_t uth_align; /* Keg: alignment. */ 666 uint32_t uth_size; /* Keg: requested size of item. */ 667 uint32_t uth_rsize; /* Keg: real size of item. */ 668 uint32_t uth_maxpages; /* Keg: maximum number of pages. */ 669 uint32_t uth_limit; /* Keg: max items to allocate. */ 670 671 /* 672 * Current dynamic zone/keg-derived statistics. 673 */ 674 uint32_t uth_pages; /* Keg: pages allocated. */ 675 uint32_t uth_keg_free; /* Keg: items free. */ 676 uint32_t uth_zone_free; /* Zone: items free. */ 677 uint32_t uth_bucketsize; /* Zone: desired bucket size. */ 678 uint32_t uth_zone_flags; /* Zone: flags. */ 679 uint64_t uth_allocs; /* Zone: number of allocations. */ 680 uint64_t uth_frees; /* Zone: number of frees. */ 681 uint64_t uth_fails; /* Zone: number of alloc failures. */ 682 uint64_t uth_sleeps; /* Zone: number of alloc sleeps. */ 683 uint64_t _uth_reserved1[2]; /* Reserved. */ 684 }; 685 686 struct uma_percpu_stat { 687 uint64_t ups_allocs; /* Cache: number of allocations. */ 688 uint64_t ups_frees; /* Cache: number of frees. */ 689 uint64_t ups_cache_free; /* Cache: free items in cache. */ 690 uint64_t _ups_reserved[5]; /* Reserved. */ 691 }; 692 693 void uma_reclaim_wakeup(void); 694 void uma_reclaim_worker(void *); 695 696 #endif /* _VM_UMA_H_ */ 697