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 8 /* 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. 236 */ 237 #define UMA_ZONE_ZINIT 0x0002 /* Initialize with zeros */ 238 #define UMA_ZONE_NOTOUCH 0x0008 /* UMA may not access the memory */ 239 #define UMA_ZONE_MALLOC 0x0010 /* For use by malloc(9) only! */ 240 #define UMA_ZONE_NOFREE 0x0020 /* Do not free slabs of this type! */ 241 #define UMA_ZONE_MTXCLASS 0x0040 /* Create a new lock class */ 242 #define UMA_ZONE_VM 0x0080 /* 243 * Used for internal vm datastructures 244 * only. 245 */ 246 #define UMA_ZONE_NOTPAGE 0x0100 /* allocf memory not vm pages */ 247 #define UMA_ZONE_SECONDARY 0x0200 /* Zone is a Secondary Zone */ 248 #define UMA_ZONE_NOBUCKET 0x0400 /* Do not use buckets. */ 249 #define UMA_ZONE_MAXBUCKET 0x0800 /* Use largest buckets. */ 250 #define UMA_ZONE_MINBUCKET 0x1000 /* Use smallest buckets. */ 251 #define UMA_ZONE_CACHESPREAD 0x2000 /* 252 * Spread memory start locations across 253 * all possible cache lines. May 254 * require many virtually contiguous 255 * backend pages and can fail early. 256 */ 257 #define UMA_ZONE_NODUMP 0x4000 /* 258 * Zone's pages will not be included in 259 * mini-dumps. 260 */ 261 #define UMA_ZONE_PCPU 0x8000 /* 262 * Allocates mp_maxid + 1 slabs of PAGE_SIZE 263 */ 264 #define UMA_ZONE_FIRSTTOUCH 0x10000 /* First touch NUMA policy */ 265 #define UMA_ZONE_ROUNDROBIN 0x20000 /* Round-robin NUMA policy. */ 266 /* In use by UMA_ZFLAGs: 0xffe00000 */ 267 268 /* 269 * These flags are shared between the keg and zone. In zones wishing to add 270 * new kegs these flags must be compatible. Some are determined based on 271 * physical parameters of the request and may not be provided by the consumer. 272 */ 273 #define UMA_ZONE_INHERIT \ 274 (UMA_ZONE_NOTOUCH | UMA_ZONE_MALLOC | UMA_ZONE_NOFREE | \ 275 UMA_ZONE_NOTPAGE | UMA_ZONE_PCPU | UMA_ZONE_FIRSTTOUCH | \ 276 UMA_ZONE_ROUNDROBIN) 277 278 /* Definitions for align */ 279 #define UMA_ALIGN_PTR (sizeof(void *) - 1) /* Alignment fit for ptr */ 280 #define UMA_ALIGN_LONG (sizeof(long) - 1) /* "" long */ 281 #define UMA_ALIGN_INT (sizeof(int) - 1) /* "" int */ 282 #define UMA_ALIGN_SHORT (sizeof(short) - 1) /* "" short */ 283 #define UMA_ALIGN_CHAR (sizeof(char) - 1) /* "" char */ 284 #define UMA_ALIGN_CACHE (0 - 1) /* Cache line size align */ 285 #define UMA_ALIGNOF(type) (_Alignof(type) - 1) /* Alignment fit for 'type' */ 286 287 #define UMA_ANYDOMAIN -1 /* Special value for domain search. */ 288 289 /* 290 * Destroys an empty uma zone. If the zone is not empty uma complains loudly. 291 * 292 * Arguments: 293 * zone The zone we want to destroy. 294 * 295 */ 296 void uma_zdestroy(uma_zone_t zone); 297 298 /* 299 * Allocates an item out of a zone 300 * 301 * Arguments: 302 * zone The zone we are allocating from 303 * arg This data is passed to the ctor function 304 * flags See sys/malloc.h for available flags. 305 * 306 * Returns: 307 * A non-null pointer to an initialized element from the zone is 308 * guaranteed if the wait flag is M_WAITOK. Otherwise a null pointer 309 * may be returned if the zone is empty or the ctor failed. 310 */ 311 312 void *uma_zalloc_arg(uma_zone_t zone, void *arg, int flags); 313 void *uma_zalloc_pcpu_arg(uma_zone_t zone, void *arg, int flags); 314 315 /* 316 * Allocate an item from a specific NUMA domain. This uses a slow path in 317 * the allocator but is guaranteed to allocate memory from the requested 318 * domain if M_WAITOK is set. 319 * 320 * Arguments: 321 * zone The zone we are allocating from 322 * arg This data is passed to the ctor function 323 * domain The domain to allocate from. 324 * flags See sys/malloc.h for available flags. 325 */ 326 void *uma_zalloc_domain(uma_zone_t zone, void *arg, int domain, int flags); 327 328 /* 329 * Allocates an item out of a zone without supplying an argument 330 * 331 * This is just a wrapper for uma_zalloc_arg for convenience. 332 * 333 */ 334 static __inline void *uma_zalloc(uma_zone_t zone, int flags); 335 static __inline void *uma_zalloc_pcpu(uma_zone_t zone, int flags); 336 337 static __inline void * 338 uma_zalloc(uma_zone_t zone, int flags) 339 { 340 return uma_zalloc_arg(zone, NULL, flags); 341 } 342 343 static __inline void * 344 uma_zalloc_pcpu(uma_zone_t zone, int flags) 345 { 346 return uma_zalloc_pcpu_arg(zone, NULL, flags); 347 } 348 349 /* 350 * Frees an item back into the specified zone. 351 * 352 * Arguments: 353 * zone The zone the item was originally allocated out of. 354 * item The memory to be freed. 355 * arg Argument passed to the destructor 356 * 357 * Returns: 358 * Nothing. 359 */ 360 361 void uma_zfree_arg(uma_zone_t zone, void *item, void *arg); 362 void uma_zfree_pcpu_arg(uma_zone_t zone, void *item, void *arg); 363 364 /* 365 * Frees an item back to the specified zone's domain specific pool. 366 * 367 * Arguments: 368 * zone The zone the item was originally allocated out of. 369 * item The memory to be freed. 370 * arg Argument passed to the destructor 371 */ 372 void uma_zfree_domain(uma_zone_t zone, void *item, void *arg); 373 374 /* 375 * Frees an item back to a zone without supplying an argument 376 * 377 * This is just a wrapper for uma_zfree_arg for convenience. 378 * 379 */ 380 static __inline void uma_zfree(uma_zone_t zone, void *item); 381 static __inline void uma_zfree_pcpu(uma_zone_t zone, void *item); 382 383 static __inline void 384 uma_zfree(uma_zone_t zone, void *item) 385 { 386 uma_zfree_arg(zone, item, NULL); 387 } 388 389 static __inline void 390 uma_zfree_pcpu(uma_zone_t zone, void *item) 391 { 392 uma_zfree_pcpu_arg(zone, item, NULL); 393 } 394 395 /* 396 * Wait until the specified zone can allocate an item. 397 */ 398 void uma_zwait(uma_zone_t zone); 399 400 /* 401 * Backend page supplier routines 402 * 403 * Arguments: 404 * zone The zone that is requesting pages. 405 * size The number of bytes being requested. 406 * pflag Flags for these memory pages, see below. 407 * domain The NUMA domain that we prefer for this allocation. 408 * wait Indicates our willingness to block. 409 * 410 * Returns: 411 * A pointer to the allocated memory or NULL on failure. 412 */ 413 414 typedef void *(*uma_alloc)(uma_zone_t zone, vm_size_t size, int domain, 415 uint8_t *pflag, int wait); 416 417 /* 418 * Backend page free routines 419 * 420 * Arguments: 421 * item A pointer to the previously allocated pages. 422 * size The original size of the allocation. 423 * pflag The flags for the slab. See UMA_SLAB_* below. 424 * 425 * Returns: 426 * None 427 */ 428 typedef void (*uma_free)(void *item, vm_size_t size, uint8_t pflag); 429 430 /* 431 * Reclaims unused memory 432 * 433 * Arguments: 434 * req Reclamation request type. 435 * Returns: 436 * None 437 */ 438 #define UMA_RECLAIM_DRAIN 1 /* release bucket cache */ 439 #define UMA_RECLAIM_DRAIN_CPU 2 /* release bucket and per-CPU caches */ 440 #define UMA_RECLAIM_TRIM 3 /* trim bucket cache to WSS */ 441 void uma_reclaim(int req); 442 void uma_zone_reclaim(uma_zone_t, int req); 443 444 /* 445 * Sets the alignment mask to be used for all zones requesting cache 446 * alignment. Should be called by MD boot code prior to starting VM/UMA. 447 * 448 * Arguments: 449 * align The alignment mask 450 * 451 * Returns: 452 * Nothing 453 */ 454 void uma_set_align(int align); 455 456 /* 457 * Set a reserved number of items to hold for M_USE_RESERVE allocations. All 458 * other requests must allocate new backing pages. 459 */ 460 void uma_zone_reserve(uma_zone_t zone, int nitems); 461 462 /* 463 * Reserves the maximum KVA space required by the zone and configures the zone 464 * to use a VM_ALLOC_NOOBJ-based backend allocator. 465 * 466 * Arguments: 467 * zone The zone to update. 468 * nitems The upper limit on the number of items that can be allocated. 469 * 470 * Returns: 471 * 0 if KVA space can not be allocated 472 * 1 if successful 473 * 474 * Discussion: 475 * When the machine supports a direct map and the zone's items are smaller 476 * than a page, the zone will use the direct map instead of allocating KVA 477 * space. 478 */ 479 int uma_zone_reserve_kva(uma_zone_t zone, int nitems); 480 481 /* 482 * Sets a high limit on the number of items allowed in a zone 483 * 484 * Arguments: 485 * zone The zone to limit 486 * nitems The requested upper limit on the number of items allowed 487 * 488 * Returns: 489 * int The effective value of nitems 490 */ 491 int uma_zone_set_max(uma_zone_t zone, int nitems); 492 493 /* 494 * Sets a high limit on the number of items allowed in zone's bucket cache 495 * 496 * Arguments: 497 * zone The zone to limit 498 * nitems The requested upper limit on the number of items allowed 499 */ 500 void uma_zone_set_maxcache(uma_zone_t zone, int nitems); 501 502 /* 503 * Obtains the effective limit on the number of items in a zone 504 * 505 * Arguments: 506 * zone The zone to obtain the effective limit from 507 * 508 * Return: 509 * 0 No limit 510 * int The effective limit of the zone 511 */ 512 int uma_zone_get_max(uma_zone_t zone); 513 514 /* 515 * Sets a warning to be printed when limit is reached 516 * 517 * Arguments: 518 * zone The zone we will warn about 519 * warning Warning content 520 * 521 * Returns: 522 * Nothing 523 */ 524 void uma_zone_set_warning(uma_zone_t zone, const char *warning); 525 526 /* 527 * Sets a function to run when limit is reached 528 * 529 * Arguments: 530 * zone The zone to which this applies 531 * fx The function ro run 532 * 533 * Returns: 534 * Nothing 535 */ 536 typedef void (*uma_maxaction_t)(uma_zone_t, int); 537 void uma_zone_set_maxaction(uma_zone_t zone, uma_maxaction_t); 538 539 /* 540 * Obtains the approximate current number of items allocated from a zone 541 * 542 * Arguments: 543 * zone The zone to obtain the current allocation count from 544 * 545 * Return: 546 * int The approximate current number of items allocated from the zone 547 */ 548 int uma_zone_get_cur(uma_zone_t zone); 549 550 /* 551 * The following two routines (uma_zone_set_init/fini) 552 * are used to set the backend init/fini pair which acts on an 553 * object as it becomes allocated and is placed in a slab within 554 * the specified zone's backing keg. These should probably not 555 * be changed once allocations have already begun, but only be set 556 * immediately upon zone creation. 557 */ 558 void uma_zone_set_init(uma_zone_t zone, uma_init uminit); 559 void uma_zone_set_fini(uma_zone_t zone, uma_fini fini); 560 561 /* 562 * The following two routines (uma_zone_set_zinit/zfini) are 563 * used to set the zinit/zfini pair which acts on an object as 564 * it passes from the backing Keg's slab cache to the 565 * specified Zone's bucket cache. These should probably not 566 * be changed once allocations have already begun, but only be set 567 * immediately upon zone creation. 568 */ 569 void uma_zone_set_zinit(uma_zone_t zone, uma_init zinit); 570 void uma_zone_set_zfini(uma_zone_t zone, uma_fini zfini); 571 572 /* 573 * Replaces the standard backend allocator for this zone. 574 * 575 * Arguments: 576 * zone The zone whose backend allocator is being changed. 577 * allocf A pointer to the allocation function 578 * 579 * Returns: 580 * Nothing 581 * 582 * Discussion: 583 * This could be used to implement pageable allocation, or perhaps 584 * even DMA allocators if used in conjunction with the OFFPAGE 585 * zone flag. 586 */ 587 588 void uma_zone_set_allocf(uma_zone_t zone, uma_alloc allocf); 589 590 /* 591 * Used for freeing memory provided by the allocf above 592 * 593 * Arguments: 594 * zone The zone that intends to use this free routine. 595 * freef The page freeing routine. 596 * 597 * Returns: 598 * Nothing 599 */ 600 601 void uma_zone_set_freef(uma_zone_t zone, uma_free freef); 602 603 /* 604 * These flags are setable in the allocf and visible in the freef. 605 */ 606 #define UMA_SLAB_BOOT 0x01 /* Slab alloced from boot pages */ 607 #define UMA_SLAB_KERNEL 0x04 /* Slab alloced from kmem */ 608 #define UMA_SLAB_PRIV 0x08 /* Slab alloced from priv allocator */ 609 #define UMA_SLAB_OFFP 0x10 /* Slab is managed separately */ 610 /* 0x02, 0x40, and 0x80 are available */ 611 612 /* 613 * Used to pre-fill a zone with some number of items 614 * 615 * Arguments: 616 * zone The zone to fill 617 * itemcnt The number of items to reserve 618 * 619 * Returns: 620 * Nothing 621 * 622 * NOTE: This is blocking and should only be done at startup 623 */ 624 void uma_prealloc(uma_zone_t zone, int itemcnt); 625 626 /* 627 * Used to determine if a fixed-size zone is exhausted. 628 * 629 * Arguments: 630 * zone The zone to check 631 * 632 * Returns: 633 * Non-zero if zone is exhausted. 634 */ 635 int uma_zone_exhausted(uma_zone_t zone); 636 637 /* 638 * Common UMA_ZONE_PCPU zones. 639 */ 640 extern uma_zone_t pcpu_zone_int; 641 extern uma_zone_t pcpu_zone_64; 642 643 /* 644 * Exported statistics structures to be used by user space monitoring tools. 645 * Statistics stream consists of a uma_stream_header, followed by a series of 646 * alternative uma_type_header and uma_type_stat structures. 647 */ 648 #define UMA_STREAM_VERSION 0x00000001 649 struct uma_stream_header { 650 uint32_t ush_version; /* Stream format version. */ 651 uint32_t ush_maxcpus; /* Value of MAXCPU for stream. */ 652 uint32_t ush_count; /* Number of records. */ 653 uint32_t _ush_pad; /* Pad/reserved field. */ 654 }; 655 656 #define UTH_MAX_NAME 32 657 #define UTH_ZONE_SECONDARY 0x00000001 658 struct uma_type_header { 659 /* 660 * Static per-zone data, some extracted from the supporting keg. 661 */ 662 char uth_name[UTH_MAX_NAME]; 663 uint32_t uth_align; /* Keg: alignment. */ 664 uint32_t uth_size; /* Keg: requested size of item. */ 665 uint32_t uth_rsize; /* Keg: real size of item. */ 666 uint32_t uth_maxpages; /* Keg: maximum number of pages. */ 667 uint32_t uth_limit; /* Keg: max items to allocate. */ 668 669 /* 670 * Current dynamic zone/keg-derived statistics. 671 */ 672 uint32_t uth_pages; /* Keg: pages allocated. */ 673 uint32_t uth_keg_free; /* Keg: items free. */ 674 uint32_t uth_zone_free; /* Zone: items free. */ 675 uint32_t uth_bucketsize; /* Zone: desired bucket size. */ 676 uint32_t uth_zone_flags; /* Zone: flags. */ 677 uint64_t uth_allocs; /* Zone: number of allocations. */ 678 uint64_t uth_frees; /* Zone: number of frees. */ 679 uint64_t uth_fails; /* Zone: number of alloc failures. */ 680 uint64_t uth_sleeps; /* Zone: number of alloc sleeps. */ 681 uint64_t uth_xdomain; /* Zone: Number of cross domain frees. */ 682 uint64_t _uth_reserved1[1]; /* Reserved. */ 683 }; 684 685 struct uma_percpu_stat { 686 uint64_t ups_allocs; /* Cache: number of allocations. */ 687 uint64_t ups_frees; /* Cache: number of frees. */ 688 uint64_t ups_cache_free; /* Cache: free items in cache. */ 689 uint64_t _ups_reserved[5]; /* Reserved. */ 690 }; 691 692 void uma_reclaim_wakeup(void); 693 void uma_reclaim_worker(void *); 694 695 unsigned long uma_limit(void); 696 697 /* Return the amount of memory managed by UMA. */ 698 unsigned long uma_size(void); 699 700 /* Return the amount of memory remaining. May be negative. */ 701 long uma_avail(void); 702 703 #endif /* _VM_UMA_H_ */ 704