osfmk/vm/vm_pageout.h

   1 /*
   2  * Copyright (c) 2000-2009 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
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   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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  23  * Please see the License for the specific language governing rights and
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  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56 /*
  57  */
  58 /*
  59  *      File:   vm/vm_pageout.h
  60  *      Author: Avadis Tevanian, Jr.
  61  *      Date:   1986
  62  *
  63  *      Declarations for the pageout daemon interface.
  64  */
  65
  66 #ifndef _VM_VM_PAGEOUT_H_
  67 #define _VM_VM_PAGEOUT_H_
  68
  69 #ifdef  KERNEL_PRIVATE
  70
  71 #include <mach/mach_types.h>
  72 #include <mach/boolean.h>
  73 #include <mach/machine/vm_types.h>
  74 #include <mach/memory_object_types.h>
  75
  76 #include <kern/kern_types.h>
  77 #include <kern/locks.h>
  78
  79 #include <libkern/OSAtomic.h>
  80
  81
  82 #include <vm/vm_options.h>
  83
  84 #ifdef  MACH_KERNEL_PRIVATE
  85 #include <vm/vm_page.h>
  86 #endif
  87
  88 #include <sys/kdebug.h>
  89
  90 #define VM_PAGE_AVAILABLE_COUNT()               ((unsigned int)(vm_page_cleaned_count))
  91
  92 /* externally manipulated counters */
  93 extern unsigned int vm_pageout_cleaned_reactivated, vm_pageout_cleaned_fault_reactivated, vm_pageout_cleaned_commit_reactivated;
  94
  95 #if CONFIG_FREEZE
  96 extern boolean_t memorystatus_freeze_enabled;
  97 #define VM_DYNAMIC_PAGING_ENABLED(port) (COMPRESSED_PAGER_IS_ACTIVE || DEFAULT_FREEZER_COMPRESSED_PAGER_IS_SWAPBACKED || (memorystatus_freeze_enabled == FALSE && IP_VALID(port)))
  98 #else
  99 #define VM_DYNAMIC_PAGING_ENABLED(port) (COMPRESSED_PAGER_IS_ACTIVE || IP_VALID(port))
 100 #endif
 101
 102 #if VM_PRESSURE_EVENTS
 103 extern boolean_t vm_pressure_events_enabled;
 104 #endif /* VM_PRESSURE_EVENTS */
 105
 106 extern int      vm_debug_events;
 107
 108 #define VMF_CHECK_ZFDELAY               0x100
 109 #define VMF_COWDELAY                    0x101
 110 #define VMF_ZFDELAY                     0x102
 111 #define VMF_COMPRESSORDELAY             0x103
 112
 113 #define VM_PAGEOUT_SCAN                 0x104
 114 #define VM_PAGEOUT_BALANCE              0x105
 115 #define VM_PAGEOUT_FREELIST             0x106
 116 #define VM_PAGEOUT_PURGEONE             0x107
 117 #define VM_PAGEOUT_CACHE_EVICT          0x108
 118 #define VM_PAGEOUT_THREAD_BLOCK         0x109
 119 #define VM_PAGEOUT_JETSAM               0x10A
 120
 121 #define VM_UPL_PAGE_WAIT                0x120
 122 #define VM_IOPL_PAGE_WAIT               0x121
 123 #define VM_PAGE_WAIT_BLOCK              0x122
 124
 125 #if CONFIG_IOSCHED
 126 #define VM_PAGE_SLEEP                   0x123
 127 #define VM_PAGE_EXPEDITE                0x124
 128 #endif
 129
 130 #define VM_PRESSURE_EVENT               0x130
 131 #define VM_EXECVE                       0x131
 132 #define VM_WAKEUP_COMPACTOR_SWAPPER     0x132
 133
 134 #define VM_DEBUG_EVENT(name, event, control, arg1, arg2, arg3, arg4)    \
 135         MACRO_BEGIN                                             \
 136         if (vm_debug_events) {                                  \
 137                 KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, event)) | control, arg1, arg2, arg3, arg4, 0); \
 138         }                                                       \
 139         MACRO_END
 140
 141 #define VM_DEBUG_CONSTANT_EVENT(name, event, control, arg1, arg2, arg3, arg4)   \
 142         MACRO_BEGIN                                             \
 143                 KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, event)) | control, arg1, arg2, arg3, arg4, 0); \
 144         MACRO_END
 145
 146 extern void memoryshot(unsigned int event, unsigned int control);
 147
 148 extern kern_return_t vm_map_create_upl(
 149         vm_map_t                map,
 150         vm_map_address_t        offset,
 151         upl_size_t              *upl_size,
 152         upl_t                   *upl,
 153         upl_page_info_array_t   page_list,
 154         unsigned int            *count,
 155         upl_control_flags_t     *flags);
 156
 157 extern ppnum_t upl_get_highest_page(
 158         upl_t                   upl);
 159
 160 extern upl_size_t upl_get_size(
 161         upl_t                   upl);
 162
 163 extern upl_t upl_associated_upl(upl_t upl);
 164 extern void upl_set_associated_upl(upl_t upl, upl_t associated_upl);
 165
 166 extern void iopl_valid_data(
 167         upl_t                   upl_ptr);
 168
 169 #ifndef MACH_KERNEL_PRIVATE
 170 typedef struct vm_page  *vm_page_t;
 171 #endif
 172
 173 extern void                vm_page_free_list(
 174                             vm_page_t   mem,
 175                             boolean_t   prepare_object);
 176
 177 extern kern_return_t      vm_page_alloc_list(
 178                             int         page_count,
 179                             int                 flags,
 180                             vm_page_t * list);
 181
 182 extern void               vm_page_set_offset(vm_page_t page, vm_object_offset_t offset);
 183 extern vm_object_offset_t vm_page_get_offset(vm_page_t page);
 184 extern ppnum_t            vm_page_get_phys_page(vm_page_t page);
 185 extern vm_page_t          vm_page_get_next(vm_page_t page);
 186
 187 extern kern_return_t    mach_vm_pressure_level_monitor(boolean_t wait_for_pressure, unsigned int *pressure_level);
 188
 189 #ifdef  MACH_KERNEL_PRIVATE
 190
 191 #include <vm/vm_page.h>
 192
 193 extern unsigned int     vm_pageout_scan_event_counter;
 194 extern unsigned int     vm_page_anonymous_count;
 195
 196
 197 /*
 198  * must hold the page queues lock to
 199  * manipulate this structure
 200  */
 201 struct vm_pageout_queue {
 202         queue_head_t    pgo_pending;    /* laundry pages to be processed by pager's iothread */
 203         unsigned int    pgo_laundry;    /* current count of laundry pages on queue or in flight */
 204         unsigned int    pgo_maxlaundry;
 205         uint64_t        pgo_tid;        /* thread ID of I/O thread that services this queue */
 206         uint8_t         pgo_lowpriority; /* iothread is set to use low priority I/O */
 207
 208         unsigned int    pgo_idle:1,     /* iothread is blocked waiting for work to do */
 209                         pgo_busy:1,     /* iothread is currently processing request from pgo_pending */
 210                         pgo_throttled:1,/* vm_pageout_scan thread needs a wakeup when pgo_laundry drops */
 211                         pgo_draining:1,
 212                         pgo_inited:1,
 213                         :0;
 214 };
 215
 216 #define VM_PAGE_Q_THROTTLED(q)          \
 217         ((q)->pgo_laundry >= (q)->pgo_maxlaundry)
 218
 219 extern struct   vm_pageout_queue        vm_pageout_queue_internal;
 220 extern struct   vm_pageout_queue        vm_pageout_queue_external;
 221
 222
 223 /*
 224  *      Routines exported to Mach.
 225  */
 226 extern void             vm_pageout(void);
 227
 228 extern kern_return_t    vm_pageout_internal_start(void);
 229
 230 extern void             vm_pageout_object_terminate(
 231                                         vm_object_t     object);
 232
 233 extern int              vm_pageout_cluster(
 234                                         vm_page_t       m,
 235                                         boolean_t       pageout,
 236                                         boolean_t       immediate_ok,
 237                                         boolean_t       keep_object_locked);
 238
 239 extern void             vm_pageout_initialize_page(
 240                                         vm_page_t       m);
 241
 242 /* UPL exported routines and structures */
 243
 244 #define upl_lock_init(object)   lck_mtx_init(&(object)->Lock, &vm_object_lck_grp, &vm_object_lck_attr)
 245 #define upl_lock_destroy(object)        lck_mtx_destroy(&(object)->Lock, &vm_object_lck_grp)
 246 #define upl_lock(object)        lck_mtx_lock(&(object)->Lock)
 247 #define upl_unlock(object)      lck_mtx_unlock(&(object)->Lock)
 248 #define upl_try_lock(object)    lck_mtx_try_lock(&(object)->Lock)
 249
 250 #define MAX_VECTOR_UPL_ELEMENTS 8
 251
 252 struct _vector_upl_iostates{
 253         upl_offset_t offset;
 254         upl_size_t   size;
 255 };
 256
 257 typedef struct _vector_upl_iostates vector_upl_iostates_t;
 258
 259 struct _vector_upl {
 260         upl_size_t              size;
 261         uint32_t                num_upls;
 262         uint32_t                invalid_upls;
 263         uint32_t                _reserved;
 264         vm_map_t                submap;
 265         vm_offset_t             submap_dst_addr;
 266         vm_object_offset_t      offset;
 267         upl_t                   upl_elems[MAX_VECTOR_UPL_ELEMENTS];
 268         upl_page_info_array_t   pagelist;
 269         vector_upl_iostates_t   upl_iostates[MAX_VECTOR_UPL_ELEMENTS];
 270 };
 271
 272 typedef struct _vector_upl* vector_upl_t;
 273
 274 /* universal page list structure */
 275
 276 #if UPL_DEBUG
 277 #define UPL_DEBUG_STACK_FRAMES  16
 278 #define UPL_DEBUG_COMMIT_RECORDS 4
 279
 280 struct ucd {
 281         upl_offset_t    c_beg;
 282         upl_offset_t    c_end;
 283         int             c_aborted;
 284         void *          c_retaddr[UPL_DEBUG_STACK_FRAMES];
 285 };
 286 #endif
 287
 288
 289 struct upl {
 290         decl_lck_mtx_data(,     Lock)   /* Synchronization */
 291         int             ref_count;
 292         int             ext_ref_count;
 293         int             flags;
 294         vm_object_t     src_object; /* object derived from */
 295         vm_object_offset_t offset;
 296         upl_size_t      size;       /* size in bytes of the address space */
 297         vm_offset_t     kaddr;      /* secondary mapping in kernel */
 298         vm_object_t     map_object;
 299         ppnum_t         highest_page;
 300         void*           vector_upl;
 301         upl_t           associated_upl;
 302 #if CONFIG_IOSCHED
 303         int             upl_priority;
 304         uint64_t        *upl_reprio_info;
 305         void            *decmp_io_upl;
 306 #endif
 307 #if CONFIG_IOSCHED || UPL_DEBUG
 308         thread_t        upl_creator;
 309         queue_chain_t   uplq;       /* List of outstanding upls on an obj */
 310 #endif
 311 #if     UPL_DEBUG
 312         uintptr_t       ubc_alias1;
 313         uintptr_t       ubc_alias2;
 314
 315         uint32_t        upl_state;
 316         uint32_t        upl_commit_index;
 317         void    *upl_create_retaddr[UPL_DEBUG_STACK_FRAMES];
 318
 319         struct  ucd     upl_commit_records[UPL_DEBUG_COMMIT_RECORDS];
 320 #endif  /* UPL_DEBUG */
 321 };
 322
 323 /* upl struct flags */
 324 #define UPL_PAGE_LIST_MAPPED    0x1
 325 #define UPL_KERNEL_MAPPED       0x2
 326 #define UPL_CLEAR_DIRTY         0x4
 327 #define UPL_COMPOSITE_LIST      0x8
 328 #define UPL_INTERNAL            0x10
 329 #define UPL_PAGE_SYNC_DONE      0x20
 330 #define UPL_DEVICE_MEMORY       0x40
 331 #define UPL_PAGEOUT             0x80
 332 #define UPL_LITE                0x100
 333 #define UPL_IO_WIRE             0x200
 334 #define UPL_ACCESS_BLOCKED      0x400
 335 #define UPL_ENCRYPTED           0x800
 336 #define UPL_SHADOWED            0x1000
 337 #define UPL_KERNEL_OBJECT       0x2000
 338 #define UPL_VECTOR              0x4000
 339 #define UPL_SET_DIRTY           0x8000
 340 #define UPL_HAS_BUSY            0x10000
 341 #define UPL_TRACKED_BY_OBJECT   0x20000
 342 #define UPL_EXPEDITE_SUPPORTED  0x40000
 343 #define UPL_DECMP_REQ           0x80000
 344 #define UPL_DECMP_REAL_IO       0x100000
 345
 346 /* flags for upl_create flags parameter */
 347 #define UPL_CREATE_EXTERNAL     0
 348 #define UPL_CREATE_INTERNAL     0x1
 349 #define UPL_CREATE_LITE         0x2
 350 #define UPL_CREATE_IO_TRACKING  0x4
 351 #define UPL_CREATE_EXPEDITE_SUP 0x8
 352
 353 extern upl_t vector_upl_create(vm_offset_t);
 354 extern void vector_upl_deallocate(upl_t);
 355 extern boolean_t vector_upl_is_valid(upl_t);
 356 extern boolean_t vector_upl_set_subupl(upl_t, upl_t, u_int32_t);
 357 extern void vector_upl_set_pagelist(upl_t);
 358 extern void vector_upl_set_submap(upl_t, vm_map_t, vm_offset_t);
 359 extern void vector_upl_get_submap(upl_t, vm_map_t*, vm_offset_t*);
 360 extern void vector_upl_set_iostate(upl_t, upl_t, upl_offset_t, upl_size_t);
 361 extern void vector_upl_get_iostate(upl_t, upl_t, upl_offset_t*, upl_size_t*);
 362 extern void vector_upl_get_iostate_byindex(upl_t, uint32_t, upl_offset_t*, upl_size_t*);
 363 extern upl_t vector_upl_subupl_byindex(upl_t , uint32_t);
 364 extern upl_t vector_upl_subupl_byoffset(upl_t , upl_offset_t*, upl_size_t*);
 365
 366 extern void vm_object_set_pmap_cache_attr(
 367                 vm_object_t             object,
 368                 upl_page_info_array_t   user_page_list,
 369                 unsigned int            num_pages,
 370                 boolean_t               batch_pmap_op);
 371
 372 extern kern_return_t vm_object_iopl_request(
 373         vm_object_t             object,
 374         vm_object_offset_t      offset,
 375         upl_size_t              size,
 376         upl_t                   *upl_ptr,
 377         upl_page_info_array_t   user_page_list,
 378         unsigned int            *page_list_count,
 379         upl_control_flags_t     cntrl_flags);
 380
 381 extern kern_return_t vm_object_super_upl_request(
 382         vm_object_t             object,
 383         vm_object_offset_t      offset,
 384         upl_size_t              size,
 385         upl_size_t              super_cluster,
 386         upl_t                   *upl,
 387         upl_page_info_t         *user_page_list,
 388         unsigned int            *page_list_count,
 389         upl_control_flags_t     cntrl_flags);
 390
 391 /* should be just a regular vm_map_enter() */
 392 extern kern_return_t vm_map_enter_upl(
 393         vm_map_t                map,
 394         upl_t                   upl,
 395         vm_map_offset_t         *dst_addr);
 396
 397 /* should be just a regular vm_map_remove() */
 398 extern kern_return_t vm_map_remove_upl(
 399         vm_map_t                map,
 400         upl_t                   upl);
 401
 402 /* wired  page list structure */
 403 typedef uint32_t *wpl_array_t;
 404
 405 extern void vm_page_free_reserve(int pages);
 406
 407 extern void vm_pageout_throttle_down(vm_page_t page);
 408 extern void vm_pageout_throttle_up(vm_page_t page);
 409
 410 /*
 411  * ENCRYPTED SWAP:
 412  */
 413 extern void upl_encrypt(
 414         upl_t                   upl,
 415         upl_offset_t            crypt_offset,
 416         upl_size_t              crypt_size);
 417 extern void vm_page_encrypt(
 418         vm_page_t               page,
 419         vm_map_offset_t         kernel_map_offset);
 420 extern boolean_t vm_pages_encrypted; /* are there encrypted pages ? */
 421 extern void vm_page_decrypt(
 422         vm_page_t               page,
 423         vm_map_offset_t         kernel_map_offset);
 424 extern kern_return_t vm_paging_map_object(
 425         vm_page_t               page,
 426         vm_object_t             object,
 427         vm_object_offset_t      offset,
 428         vm_prot_t               protection,
 429         boolean_t               can_unlock_object,
 430         vm_map_size_t           *size,          /* IN/OUT */
 431         vm_map_offset_t         *address,       /* OUT */
 432         boolean_t               *need_unmap);   /* OUT */
 433 extern void vm_paging_unmap_object(
 434         vm_object_t             object,
 435         vm_map_offset_t         start,
 436         vm_map_offset_t         end);
 437 decl_simple_lock_data(extern, vm_paging_lock)
 438
 439 /*
 440  * Backing store throttle when BS is exhausted
 441  */
 442 extern unsigned int    vm_backing_store_low;
 443
 444 extern void vm_pageout_steal_laundry(
 445         vm_page_t page,
 446         boolean_t queues_locked);
 447
 448 extern boolean_t vm_page_is_slideable(vm_page_t m);
 449
 450 extern kern_return_t vm_page_slide(vm_page_t page, vm_map_offset_t kernel_mapping_offset);
 451 #endif  /* MACH_KERNEL_PRIVATE */
 452
 453 #if UPL_DEBUG
 454 extern kern_return_t  upl_ubc_alias_set(
 455         upl_t upl,
 456         uintptr_t alias1,
 457         uintptr_t alias2);
 458 extern int  upl_ubc_alias_get(
 459         upl_t upl,
 460         uintptr_t * al,
 461         uintptr_t * al2);
 462 #endif /* UPL_DEBUG */
 463
 464 extern void vm_countdirtypages(void);
 465
 466 extern void vm_backing_store_disable(
 467                         boolean_t       suspend);
 468
 469 extern kern_return_t upl_transpose(
 470         upl_t   upl1,
 471         upl_t   upl2);
 472
 473 extern kern_return_t mach_vm_pressure_monitor(
 474         boolean_t       wait_for_pressure,
 475         unsigned int    nsecs_monitored,
 476         unsigned int    *pages_reclaimed_p,
 477         unsigned int    *pages_wanted_p);
 478
 479 extern kern_return_t
 480 vm_set_buffer_cleanup_callout(
 481         boolean_t       (*func)(int));
 482
 483 struct vm_page_stats_reusable {
 484         SInt32          reusable_count;
 485         uint64_t        reusable;
 486         uint64_t        reused;
 487         uint64_t        reused_wire;
 488         uint64_t        reused_remove;
 489         uint64_t        all_reusable_calls;
 490         uint64_t        partial_reusable_calls;
 491         uint64_t        all_reuse_calls;
 492         uint64_t        partial_reuse_calls;
 493         uint64_t        reusable_pages_success;
 494         uint64_t        reusable_pages_failure;
 495         uint64_t        reusable_pages_shared;
 496         uint64_t        reuse_pages_success;
 497         uint64_t        reuse_pages_failure;
 498         uint64_t        can_reuse_success;
 499         uint64_t        can_reuse_failure;
 500         uint64_t        reusable_reclaimed;
 501 };
 502 extern struct vm_page_stats_reusable vm_page_stats_reusable;
 503
 504 extern int hibernate_flush_memory(void);
 505 extern void hibernate_reset_stats(void);
 506 extern void hibernate_create_paddr_map(void);
 507
 508 extern void vm_set_restrictions(void);
 509
 510 extern int vm_compressor_mode;
 511 extern int vm_compressor_thread_count;
 512 extern boolean_t vm_restricted_to_single_processor;
 513 extern boolean_t vm_compressor_immediate_preferred;
 514 extern boolean_t vm_compressor_immediate_preferred_override;
 515 extern kern_return_t vm_pageout_compress_page(void **, char *, vm_page_t, boolean_t);
 516 extern void vm_pageout_anonymous_pages(void);
 517
 518
 519 #define VM_PAGER_DEFAULT                                0x1     /* Use default pager. */
 520 #define VM_PAGER_COMPRESSOR_NO_SWAP                     0x2     /* In-core compressor only. */
 521 #define VM_PAGER_COMPRESSOR_WITH_SWAP                   0x4     /* In-core compressor + swap backend. */
 522 #define VM_PAGER_FREEZER_DEFAULT                        0x8     /* Freezer backed by default pager.*/
 523 #define VM_PAGER_FREEZER_COMPRESSOR_NO_SWAP             0x10    /* Freezer backed by in-core compressor only i.e. frozen data remain in-core compressed.*/
 524 #define VM_PAGER_FREEZER_COMPRESSOR_WITH_SWAP           0x20    /* Freezer backed by in-core compressor with swap support too.*/
 525
 526 #define VM_PAGER_MAX_MODES                              6       /* Total number of vm compressor modes supported */
 527
 528 #define DEFAULT_PAGER_IS_ACTIVE         ((vm_compressor_mode & VM_PAGER_DEFAULT) == VM_PAGER_DEFAULT)
 529
 530 #define COMPRESSED_PAGER_IS_ACTIVE      (vm_compressor_mode & (VM_PAGER_COMPRESSOR_NO_SWAP | VM_PAGER_COMPRESSOR_WITH_SWAP))
 531 #define COMPRESSED_PAGER_IS_SWAPLESS    ((vm_compressor_mode & VM_PAGER_COMPRESSOR_NO_SWAP) == VM_PAGER_COMPRESSOR_NO_SWAP)
 532 #define COMPRESSED_PAGER_IS_SWAPBACKED  ((vm_compressor_mode & VM_PAGER_COMPRESSOR_WITH_SWAP) == VM_PAGER_COMPRESSOR_WITH_SWAP)
 533
 534 #define DEFAULT_FREEZER_IS_ACTIVE       ((vm_compressor_mode & VM_PAGER_FREEZER_DEFAULT) == VM_PAGER_FREEZER_DEFAULT)
 535
 536 #define DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE              (vm_compressor_mode & (VM_PAGER_FREEZER_COMPRESSOR_NO_SWAP | VM_PAGER_FREEZER_COMPRESSOR_WITH_SWAP))
 537 #define DEFAULT_FREEZER_COMPRESSED_PAGER_IS_SWAPLESS            ((vm_compressor_mode & VM_PAGER_FREEZER_COMPRESSOR_NO_SWAP) == VM_PAGER_FREEZER_COMPRESSOR_NO_SWAP)
 538 #define DEFAULT_FREEZER_COMPRESSED_PAGER_IS_SWAPBACKED          ((vm_compressor_mode & VM_PAGER_FREEZER_COMPRESSOR_WITH_SWAP) == VM_PAGER_FREEZER_COMPRESSOR_WITH_SWAP)
 539
 540
 541 #endif  /* KERNEL_PRIVATE */
 542
 543 #endif  /* _VM_VM_PAGEOUT_H_ */