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_MINBUCKET 0x10000 /* Use smallest buckets. */ 272 #define UMA_ZONE_FIRSTTOUCH 0x20000 /* First touch NUMA policy */ 273 #define UMA_ZONE_ROUNDROBIN 0x40000 /* Round-robin NUMA policy. */ 274 275 /* 276 * These flags are shared between the keg and zone. In zones wishing to add 277 * new kegs these flags must be compatible. Some are determined based on 278 * physical parameters of the request and may not be provided by the consumer. 279 */ 280 #define UMA_ZONE_INHERIT \ 281 (UMA_ZONE_OFFPAGE | UMA_ZONE_MALLOC | UMA_ZONE_NOFREE | \ 282 UMA_ZONE_HASH | UMA_ZONE_VTOSLAB | UMA_ZONE_PCPU | \ 283 UMA_ZONE_FIRSTTOUCH | UMA_ZONE_ROUNDROBIN) 284 285 /* Definitions for align */ 286 #define UMA_ALIGN_PTR (sizeof(void *) - 1) /* Alignment fit for ptr */ 287 #define UMA_ALIGN_LONG (sizeof(long) - 1) /* "" long */ 288 #define UMA_ALIGN_INT (sizeof(int) - 1) /* "" int */ 289 #define UMA_ALIGN_SHORT (sizeof(short) - 1) /* "" short */ 290 #define UMA_ALIGN_CHAR (sizeof(char) - 1) /* "" char */ 291 #define UMA_ALIGN_CACHE (0 - 1) /* Cache line size align */ 292 #define UMA_ALIGNOF(type) (_Alignof(type) - 1) /* Alignment fit for 'type' */ 293 294 #define UMA_ANYDOMAIN -1 /* Special value for domain search. */ 295 296 /* 297 * Destroys an empty uma zone. If the zone is not empty uma complains loudly. 298 * 299 * Arguments: 300 * zone The zone we want to destroy. 301 * 302 */ 303 void uma_zdestroy(uma_zone_t zone); 304 305 /* 306 * Allocates an item out of a zone 307 * 308 * Arguments: 309 * zone The zone we are allocating from 310 * arg This data is passed to the ctor function 311 * flags See sys/malloc.h for available flags. 312 * 313 * Returns: 314 * A non-null pointer to an initialized element from the zone is 315 * guaranteed if the wait flag is M_WAITOK. Otherwise a null pointer 316 * may be returned if the zone is empty or the ctor failed. 317 */ 318 319 void *uma_zalloc_arg(uma_zone_t zone, void *arg, int flags); 320 void *uma_zalloc_pcpu_arg(uma_zone_t zone, void *arg, int flags); 321 322 /* 323 * Allocate an item from a specific NUMA domain. This uses a slow path in 324 * the allocator but is guaranteed to allocate memory from the requested 325 * domain if M_WAITOK is set. 326 * 327 * Arguments: 328 * zone The zone we are allocating from 329 * arg This data is passed to the ctor function 330 * domain The domain to allocate from. 331 * flags See sys/malloc.h for available flags. 332 */ 333 void *uma_zalloc_domain(uma_zone_t zone, void *arg, int domain, int flags); 334 335 /* 336 * Allocates an item out of a zone without supplying an argument 337 * 338 * This is just a wrapper for uma_zalloc_arg for convenience. 339 * 340 */ 341 static __inline void *uma_zalloc(uma_zone_t zone, int flags); 342 static __inline void *uma_zalloc_pcpu(uma_zone_t zone, int flags); 343 344 static __inline void * 345 uma_zalloc(uma_zone_t zone, int flags) 346 { 347 return uma_zalloc_arg(zone, NULL, flags); 348 } 349 350 static __inline void * 351 uma_zalloc_pcpu(uma_zone_t zone, int flags) 352 { 353 return uma_zalloc_pcpu_arg(zone, NULL, flags); 354 } 355 356 /* 357 * Frees an item back into the specified zone. 358 * 359 * Arguments: 360 * zone The zone the item was originally allocated out of. 361 * item The memory to be freed. 362 * arg Argument passed to the destructor 363 * 364 * Returns: 365 * Nothing. 366 */ 367 368 void uma_zfree_arg(uma_zone_t zone, void *item, void *arg); 369 void uma_zfree_pcpu_arg(uma_zone_t zone, void *item, void *arg); 370 371 /* 372 * Frees an item back to the specified zone's domain specific pool. 373 * 374 * Arguments: 375 * zone The zone the item was originally allocated out of. 376 * item The memory to be freed. 377 * arg Argument passed to the destructor 378 */ 379 void uma_zfree_domain(uma_zone_t zone, void *item, void *arg); 380 381 /* 382 * Frees an item back to a zone without supplying an argument 383 * 384 * This is just a wrapper for uma_zfree_arg for convenience. 385 * 386 */ 387 static __inline void uma_zfree(uma_zone_t zone, void *item); 388 static __inline void uma_zfree_pcpu(uma_zone_t zone, void *item); 389 390 static __inline void 391 uma_zfree(uma_zone_t zone, void *item) 392 { 393 uma_zfree_arg(zone, item, NULL); 394 } 395 396 static __inline void 397 uma_zfree_pcpu(uma_zone_t zone, void *item) 398 { 399 uma_zfree_pcpu_arg(zone, item, NULL); 400 } 401 402 /* 403 * Wait until the specified zone can allocate an item. 404 */ 405 void uma_zwait(uma_zone_t zone); 406 407 /* 408 * Backend page supplier routines 409 * 410 * Arguments: 411 * zone The zone that is requesting pages. 412 * size The number of bytes being requested. 413 * pflag Flags for these memory pages, see below. 414 * domain The NUMA domain that we prefer for this allocation. 415 * wait Indicates our willingness to block. 416 * 417 * Returns: 418 * A pointer to the allocated memory or NULL on failure. 419 */ 420 421 typedef void *(*uma_alloc)(uma_zone_t zone, vm_size_t size, int domain, 422 uint8_t *pflag, int wait); 423 424 /* 425 * Backend page free routines 426 * 427 * Arguments: 428 * item A pointer to the previously allocated pages. 429 * size The original size of the allocation. 430 * pflag The flags for the slab. See UMA_SLAB_* below. 431 * 432 * Returns: 433 * None 434 */ 435 typedef void (*uma_free)(void *item, vm_size_t size, uint8_t pflag); 436 437 /* 438 * Reclaims unused memory 439 * 440 * Arguments: 441 * req Reclamation request type. 442 * Returns: 443 * None 444 */ 445 #define UMA_RECLAIM_DRAIN 1 /* release bucket cache */ 446 #define UMA_RECLAIM_DRAIN_CPU 2 /* release bucket and per-CPU caches */ 447 #define UMA_RECLAIM_TRIM 3 /* trim bucket cache to WSS */ 448 void uma_reclaim(int req); 449 void uma_zone_reclaim(uma_zone_t, int req); 450 451 /* 452 * Sets the alignment mask to be used for all zones requesting cache 453 * alignment. Should be called by MD boot code prior to starting VM/UMA. 454 * 455 * Arguments: 456 * align The alignment mask 457 * 458 * Returns: 459 * Nothing 460 */ 461 void uma_set_align(int align); 462 463 /* 464 * Set a reserved number of items to hold for M_USE_RESERVE allocations. All 465 * other requests must allocate new backing pages. 466 */ 467 void uma_zone_reserve(uma_zone_t zone, int nitems); 468 469 /* 470 * Reserves the maximum KVA space required by the zone and configures the zone 471 * to use a VM_ALLOC_NOOBJ-based backend allocator. 472 * 473 * Arguments: 474 * zone The zone to update. 475 * nitems The upper limit on the number of items that can be allocated. 476 * 477 * Returns: 478 * 0 if KVA space can not be allocated 479 * 1 if successful 480 * 481 * Discussion: 482 * When the machine supports a direct map and the zone's items are smaller 483 * than a page, the zone will use the direct map instead of allocating KVA 484 * space. 485 */ 486 int uma_zone_reserve_kva(uma_zone_t zone, int nitems); 487 488 /* 489 * Sets a high limit on the number of items allowed in a zone 490 * 491 * Arguments: 492 * zone The zone to limit 493 * nitems The requested upper limit on the number of items allowed 494 * 495 * Returns: 496 * int The effective value of nitems 497 */ 498 int uma_zone_set_max(uma_zone_t zone, int nitems); 499 500 /* 501 * Sets a high limit on the number of items allowed in zone's bucket cache 502 * 503 * Arguments: 504 * zone The zone to limit 505 * nitems The requested upper limit on the number of items allowed 506 */ 507 void uma_zone_set_maxcache(uma_zone_t zone, int nitems); 508 509 /* 510 * Obtains the effective limit on the number of items in a zone 511 * 512 * Arguments: 513 * zone The zone to obtain the effective limit from 514 * 515 * Return: 516 * 0 No limit 517 * int The effective limit of the zone 518 */ 519 int uma_zone_get_max(uma_zone_t zone); 520 521 /* 522 * Sets a warning to be printed when limit is reached 523 * 524 * Arguments: 525 * zone The zone we will warn about 526 * warning Warning content 527 * 528 * Returns: 529 * Nothing 530 */ 531 void uma_zone_set_warning(uma_zone_t zone, const char *warning); 532 533 /* 534 * Sets a function to run when limit is reached 535 * 536 * Arguments: 537 * zone The zone to which this applies 538 * fx The function ro run 539 * 540 * Returns: 541 * Nothing 542 */ 543 typedef void (*uma_maxaction_t)(uma_zone_t, int); 544 void uma_zone_set_maxaction(uma_zone_t zone, uma_maxaction_t); 545 546 /* 547 * Obtains the approximate current number of items allocated from a zone 548 * 549 * Arguments: 550 * zone The zone to obtain the current allocation count from 551 * 552 * Return: 553 * int The approximate current number of items allocated from the zone 554 */ 555 int uma_zone_get_cur(uma_zone_t zone); 556 557 /* 558 * The following two routines (uma_zone_set_init/fini) 559 * are used to set the backend init/fini pair which acts on an 560 * object as it becomes allocated and is placed in a slab within 561 * the specified zone's backing keg. These should probably not 562 * be changed once allocations have already begun, but only be set 563 * immediately upon zone creation. 564 */ 565 void uma_zone_set_init(uma_zone_t zone, uma_init uminit); 566 void uma_zone_set_fini(uma_zone_t zone, uma_fini fini); 567 568 /* 569 * The following two routines (uma_zone_set_zinit/zfini) are 570 * used to set the zinit/zfini pair which acts on an object as 571 * it passes from the backing Keg's slab cache to the 572 * specified Zone's bucket cache. These should probably not 573 * be changed once allocations have already begun, but only be set 574 * immediately upon zone creation. 575 */ 576 void uma_zone_set_zinit(uma_zone_t zone, uma_init zinit); 577 void uma_zone_set_zfini(uma_zone_t zone, uma_fini zfini); 578 579 /* 580 * Replaces the standard backend allocator for this zone. 581 * 582 * Arguments: 583 * zone The zone whose backend allocator is being changed. 584 * allocf A pointer to the allocation function 585 * 586 * Returns: 587 * Nothing 588 * 589 * Discussion: 590 * This could be used to implement pageable allocation, or perhaps 591 * even DMA allocators if used in conjunction with the OFFPAGE 592 * zone flag. 593 */ 594 595 void uma_zone_set_allocf(uma_zone_t zone, uma_alloc allocf); 596 597 /* 598 * Used for freeing memory provided by the allocf above 599 * 600 * Arguments: 601 * zone The zone that intends to use this free routine. 602 * freef The page freeing routine. 603 * 604 * Returns: 605 * Nothing 606 */ 607 608 void uma_zone_set_freef(uma_zone_t zone, uma_free freef); 609 610 /* 611 * These flags are setable in the allocf and visible in the freef. 612 */ 613 #define UMA_SLAB_BOOT 0x01 /* Slab alloced from boot pages */ 614 #define UMA_SLAB_KERNEL 0x04 /* Slab alloced from kmem */ 615 #define UMA_SLAB_PRIV 0x08 /* Slab alloced from priv allocator */ 616 #define UMA_SLAB_OFFP 0x10 /* Slab is managed separately */ 617 /* 0x02, 0x40, and 0x80 are available */ 618 619 /* 620 * Used to pre-fill a zone with some number of items 621 * 622 * Arguments: 623 * zone The zone to fill 624 * itemcnt The number of items to reserve 625 * 626 * Returns: 627 * Nothing 628 * 629 * NOTE: This is blocking and should only be done at startup 630 */ 631 void uma_prealloc(uma_zone_t zone, int itemcnt); 632 633 /* 634 * Used to determine if a fixed-size zone is exhausted. 635 * 636 * Arguments: 637 * zone The zone to check 638 * 639 * Returns: 640 * Non-zero if zone is exhausted. 641 */ 642 int uma_zone_exhausted(uma_zone_t zone); 643 644 /* 645 * Common UMA_ZONE_PCPU zones. 646 */ 647 extern uma_zone_t pcpu_zone_int; 648 extern uma_zone_t pcpu_zone_64; 649 650 /* 651 * Exported statistics structures to be used by user space monitoring tools. 652 * Statistics stream consists of a uma_stream_header, followed by a series of 653 * alternative uma_type_header and uma_type_stat structures. 654 */ 655 #define UMA_STREAM_VERSION 0x00000001 656 struct uma_stream_header { 657 uint32_t ush_version; /* Stream format version. */ 658 uint32_t ush_maxcpus; /* Value of MAXCPU for stream. */ 659 uint32_t ush_count; /* Number of records. */ 660 uint32_t _ush_pad; /* Pad/reserved field. */ 661 }; 662 663 #define UTH_MAX_NAME 32 664 #define UTH_ZONE_SECONDARY 0x00000001 665 struct uma_type_header { 666 /* 667 * Static per-zone data, some extracted from the supporting keg. 668 */ 669 char uth_name[UTH_MAX_NAME]; 670 uint32_t uth_align; /* Keg: alignment. */ 671 uint32_t uth_size; /* Keg: requested size of item. */ 672 uint32_t uth_rsize; /* Keg: real size of item. */ 673 uint32_t uth_maxpages; /* Keg: maximum number of pages. */ 674 uint32_t uth_limit; /* Keg: max items to allocate. */ 675 676 /* 677 * Current dynamic zone/keg-derived statistics. 678 */ 679 uint32_t uth_pages; /* Keg: pages allocated. */ 680 uint32_t uth_keg_free; /* Keg: items free. */ 681 uint32_t uth_zone_free; /* Zone: items free. */ 682 uint32_t uth_bucketsize; /* Zone: desired bucket size. */ 683 uint32_t uth_zone_flags; /* Zone: flags. */ 684 uint64_t uth_allocs; /* Zone: number of allocations. */ 685 uint64_t uth_frees; /* Zone: number of frees. */ 686 uint64_t uth_fails; /* Zone: number of alloc failures. */ 687 uint64_t uth_sleeps; /* Zone: number of alloc sleeps. */ 688 uint64_t uth_xdomain; /* Zone: Number of cross domain frees. */ 689 uint64_t _uth_reserved1[1]; /* Reserved. */ 690 }; 691 692 struct uma_percpu_stat { 693 uint64_t ups_allocs; /* Cache: number of allocations. */ 694 uint64_t ups_frees; /* Cache: number of frees. */ 695 uint64_t ups_cache_free; /* Cache: free items in cache. */ 696 uint64_t _ups_reserved[5]; /* Reserved. */ 697 }; 698 699 void uma_reclaim_wakeup(void); 700 void uma_reclaim_worker(void *); 701 702 unsigned long uma_limit(void); 703 704 /* Return the amount of memory managed by UMA. */ 705 unsigned long uma_size(void); 706 707 /* Return the amount of memory remaining. May be negative. */ 708 long uma_avail(void); 709 710 #endif /* _VM_UMA_H_ */ 711