1 /* 2 * Copyright (c) 2000-2016 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 7 * as defined in and that are subject to the Apple Public Source License 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, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 #include <vm/vm_compressor_pager.h> 30 #include <vm/vm_kern.h> 31 #include <vm/vm_page.h> 32 #include <vm/vm_protos.h> 33 #include <vm/WKdm_new.h> 34 #include <vm/vm_object.h> 35 #include <vm/vm_map.h> 36 #include <machine/pmap.h> 37 #include <kern/locks.h> 38 39 #include <sys/kdebug.h> 40 41 #if defined(__arm64__) 42 #include <arm/proc_reg.h> 43 #endif 44 45 #define C_SEG_OFFSET_BITS 16 46 47 #define C_SEG_MAX_POPULATE_SIZE (4 * PAGE_SIZE) 48 49 #if defined(__arm64__) && (DEVELOPMENT || DEBUG) 50 51 #if defined(PLATFORM_WatchOS) 52 #define VALIDATE_C_SEGMENTS (1) 53 #endif 54 #endif /* defined(__arm64__) && (DEVELOPMENT || DEBUG) */ 55 56 57 #if DEBUG || COMPRESSOR_INTEGRITY_CHECKS 58 #define ENABLE_SWAP_CHECKS 1 59 #define ENABLE_COMPRESSOR_CHECKS 1 60 #define POPCOUNT_THE_COMPRESSED_DATA (1) 61 #else 62 #define ENABLE_SWAP_CHECKS 0 63 #define ENABLE_COMPRESSOR_CHECKS 0 64 #endif 65 66 #define CHECKSUM_THE_SWAP ENABLE_SWAP_CHECKS /* Debug swap data */ 67 #define CHECKSUM_THE_DATA ENABLE_COMPRESSOR_CHECKS /* Debug compressor/decompressor data */ 68 #define CHECKSUM_THE_COMPRESSED_DATA ENABLE_COMPRESSOR_CHECKS /* Debug compressor/decompressor compressed data */ 69 70 #ifndef VALIDATE_C_SEGMENTS 71 #define VALIDATE_C_SEGMENTS ENABLE_COMPRESSOR_CHECKS /* Debug compaction */ 72 #endif 73 74 #define RECORD_THE_COMPRESSED_DATA 0 75 76 /* 77 * The c_slot structure embeds a packed pointer to a c_slot_mapping 78 * (32bits) which we ideally want to span as much VA space as possible 79 * to not limit zalloc in how it sets itself up. 80 */ 81 #if !defined(__LP64__) /* no packing */ 82 #define C_SLOT_PACKED_PTR_BITS 32 83 #define C_SLOT_PACKED_PTR_SHIFT 0 84 #define C_SLOT_PACKED_PTR_BASE 0 85 86 #define C_SLOT_C_SIZE_BITS 12 87 #define C_SLOT_C_CODEC_BITS 1 88 #define C_SLOT_C_POPCOUNT_BITS 0 89 #define C_SLOT_C_PADDING_BITS 3 90 91 #elif __APPLE_WKDM_POPCNT_EXTENSIONS__ /* no packing */ 92 #define C_SLOT_PACKED_PTR_BITS 47 93 #define C_SLOT_PACKED_PTR_SHIFT 0 94 #define C_SLOT_PACKED_PTR_BASE ((uintptr_t)KERNEL_PMAP_HEAP_RANGE_START) 95 96 #define C_SLOT_C_SIZE_BITS 14 97 #define C_SLOT_C_CODEC_BITS 1 98 #define C_SLOT_C_POPCOUNT_BITS 18 99 #define C_SLOT_C_PADDING_BITS 0 100 101 #elif defined(__arm64__) /* 32G from the heap start */ 102 #define C_SLOT_PACKED_PTR_BITS 33 103 #define C_SLOT_PACKED_PTR_SHIFT 2 104 #define C_SLOT_PACKED_PTR_BASE ((uintptr_t)KERNEL_PMAP_HEAP_RANGE_START) 105 106 #define C_SLOT_C_SIZE_BITS 14 107 #define C_SLOT_C_CODEC_BITS 1 108 #define C_SLOT_C_POPCOUNT_BITS 0 109 #define C_SLOT_C_PADDING_BITS 0 110 111 #elif defined(__x86_64__) /* 256G from the heap start */ 112 #define C_SLOT_PACKED_PTR_BITS 36 113 #define C_SLOT_PACKED_PTR_SHIFT 2 114 #define C_SLOT_PACKED_PTR_BASE ((uintptr_t)KERNEL_PMAP_HEAP_RANGE_START) 115 116 #define C_SLOT_C_SIZE_BITS 12 117 #define C_SLOT_C_CODEC_BITS 0 /* not used */ 118 #define C_SLOT_C_POPCOUNT_BITS 0 119 #define C_SLOT_C_PADDING_BITS 0 120 121 #else 122 #error vm_compressor parameters undefined for this architecture 123 #endif 124 125 /* 126 * Popcounts needs to represent both 0 and full which requires 127 * (8 ^ C_SLOT_C_SIZE_BITS) + 1 values and (C_SLOT_C_SIZE_BITS + 4) bits. 128 * 129 * We us the (2 * (8 ^ C_SLOT_C_SIZE_BITS) - 1) value to mean "unknown". 130 */ 131 #define C_SLOT_NO_POPCOUNT ((16u << C_SLOT_C_SIZE_BITS) - 1) 132 133 static_assert((C_SEG_OFFSET_BITS + C_SLOT_C_SIZE_BITS + 134 C_SLOT_C_CODEC_BITS + C_SLOT_C_POPCOUNT_BITS + 135 C_SLOT_C_PADDING_BITS + C_SLOT_PACKED_PTR_BITS) % 32 == 0); 136 137 struct c_slot { 138 uint64_t c_offset:C_SEG_OFFSET_BITS; 139 uint64_t c_size:C_SLOT_C_SIZE_BITS; 140 #if C_SLOT_C_CODEC_BITS 141 uint64_t c_codec:C_SLOT_C_CODEC_BITS; 142 #endif 143 #if C_SLOT_C_POPCOUNT_BITS 144 /* 145 * This value may not agree with c_pop_cdata, as it may be the 146 * population count of the uncompressed data. 147 * 148 * This value must be C_SLOT_NO_POPCOUNT when the compression algorithm 149 * cannot provide it. 150 */ 151 uint32_t c_inline_popcount:C_SLOT_C_POPCOUNT_BITS; 152 #endif 153 #if C_SLOT_C_PADDING_BITS 154 uint64_t c_padding:C_SLOT_C_PADDING_BITS; 155 #endif 156 uint64_t c_packed_ptr:C_SLOT_PACKED_PTR_BITS; 157 158 /* debugging fields, typically not present on release kernels */ 159 #if CHECKSUM_THE_DATA 160 unsigned int c_hash_data; 161 #endif 162 #if CHECKSUM_THE_COMPRESSED_DATA 163 unsigned int c_hash_compressed_data; 164 #endif 165 #if POPCOUNT_THE_COMPRESSED_DATA 166 unsigned int c_pop_cdata; 167 #endif 168 } __attribute__((packed, aligned(4))); 169 170 #define C_IS_EMPTY 0 171 #define C_IS_FREE 1 172 #define C_IS_FILLING 2 173 #define C_ON_AGE_Q 3 174 #define C_ON_SWAPOUT_Q 4 175 #define C_ON_SWAPPEDOUT_Q 5 176 #define C_ON_SWAPPEDOUTSPARSE_Q 6 177 #define C_ON_SWAPPEDIN_Q 7 178 #define C_ON_MAJORCOMPACT_Q 8 179 #define C_ON_BAD_Q 9 180 #define C_ON_SWAPIO_Q 10 181 182 183 struct c_segment { 184 lck_mtx_t c_lock; 185 queue_chain_t c_age_list; 186 queue_chain_t c_list; 187 188 #if CONFIG_FREEZE 189 queue_chain_t c_task_list_next_cseg; 190 task_t c_task_owner; 191 #endif /* CONFIG_FREEZE */ 192 193 #define C_SEG_MAX_LIMIT (1 << 20) /* this needs to track the size of c_mysegno */ 194 uint32_t c_mysegno:20, 195 c_busy:1, 196 c_busy_swapping:1, 197 c_wanted:1, 198 c_on_minorcompact_q:1, /* can also be on the age_q, the majorcompact_q or the swappedin_q */ 199 200 c_state:4, /* what state is the segment in which dictates which q to find it on */ 201 c_overage_swap:1, 202 c_reserved:3; 203 204 uint32_t c_creation_ts; 205 uint64_t c_generation_id; 206 207 int32_t c_bytes_used; 208 int32_t c_bytes_unused; 209 uint32_t c_slots_used; 210 211 uint16_t c_firstemptyslot; 212 uint16_t c_nextslot; 213 uint32_t c_nextoffset; 214 uint32_t c_populated_offset; 215 216 union { 217 int32_t *c_buffer; 218 uint64_t c_swap_handle; 219 } c_store; 220 221 #if VALIDATE_C_SEGMENTS 222 uint32_t c_was_minor_compacted; 223 uint32_t c_was_major_compacted; 224 uint32_t c_was_major_donor; 225 #endif 226 #if CHECKSUM_THE_SWAP 227 unsigned int cseg_hash; 228 unsigned int cseg_swap_size; 229 #endif /* CHECKSUM_THE_SWAP */ 230 231 thread_t c_busy_for_thread; 232 uint32_t c_agedin_ts; 233 uint32_t c_swappedin_ts; 234 bool c_swappedin; 235 236 int c_slot_var_array_len; 237 struct c_slot *c_slot_var_array; 238 struct c_slot c_slot_fixed_array[0]; 239 }; 240 241 242 struct c_slot_mapping { 243 uint32_t s_cseg:22, /* segment number + 1 */ 244 s_cindx:10; /* index in the segment */ 245 }; 246 #define C_SLOT_MAX_INDEX (1 << 10) 247 248 typedef struct c_slot_mapping *c_slot_mapping_t; 249 250 251 extern int c_seg_fixed_array_len; 252 extern vm_offset_t c_buffers; 253 #define C_SEG_BUFFER_ADDRESS(c_segno) ((c_buffers + ((uint64_t)c_segno * (uint64_t)c_seg_allocsize))) 254 255 #define C_SEG_SLOT_FROM_INDEX(cseg, index) (index < c_seg_fixed_array_len ? &(cseg->c_slot_fixed_array[index]) : &(cseg->c_slot_var_array[index - c_seg_fixed_array_len])) 256 257 #define C_SEG_OFFSET_TO_BYTES(off) ((off) * (int) sizeof(int32_t)) 258 #define C_SEG_BYTES_TO_OFFSET(bytes) ((bytes) / (int) sizeof(int32_t)) 259 260 #define C_SEG_UNUSED_BYTES(cseg) (cseg->c_bytes_unused + (C_SEG_OFFSET_TO_BYTES(cseg->c_populated_offset - cseg->c_nextoffset))) 261 //todo opensource 262 263 #ifndef __PLATFORM_WKDM_ALIGNMENT_MASK__ 264 #define C_SEG_OFFSET_ALIGNMENT_MASK 0x3ULL 265 #define C_SEG_OFFSET_ALIGNMENT_BOUNDARY 0x4 266 #else 267 #define C_SEG_OFFSET_ALIGNMENT_MASK __PLATFORM_WKDM_ALIGNMENT_MASK__ 268 #define C_SEG_OFFSET_ALIGNMENT_BOUNDARY __PLATFORM_WKDM_ALIGNMENT_BOUNDARY__ 269 #endif 270 271 #define C_SEG_SHOULD_MINORCOMPACT_NOW(cseg) ((C_SEG_UNUSED_BYTES(cseg) >= (c_seg_bufsize / 4)) ? 1 : 0) 272 273 /* 274 * the decsion to force a c_seg to be major compacted is based on 2 criteria 275 * 1) is the c_seg buffer almost empty (i.e. we have a chance to merge it with another c_seg) 276 * 2) are there at least a minimum number of slots unoccupied so that we have a chance 277 * of combining this c_seg with another one. 278 */ 279 #define C_SEG_SHOULD_MAJORCOMPACT_NOW(cseg) \ 280 ((((cseg->c_bytes_unused + (c_seg_bufsize - C_SEG_OFFSET_TO_BYTES(c_seg->c_nextoffset))) >= (c_seg_bufsize / 8)) && \ 281 ((C_SLOT_MAX_INDEX - cseg->c_slots_used) > (c_seg_bufsize / PAGE_SIZE))) \ 282 ? 1 : 0) 283 284 #define C_SEG_ONDISK_IS_SPARSE(cseg) ((cseg->c_bytes_used < cseg->c_bytes_unused) ? 1 : 0) 285 #define C_SEG_IS_ONDISK(cseg) ((cseg->c_state == C_ON_SWAPPEDOUT_Q || cseg->c_state == C_ON_SWAPPEDOUTSPARSE_Q)) 286 #define C_SEG_IS_ON_DISK_OR_SOQ(cseg) ((cseg->c_state == C_ON_SWAPPEDOUT_Q || \ 287 cseg->c_state == C_ON_SWAPPEDOUTSPARSE_Q || \ 288 cseg->c_state == C_ON_SWAPOUT_Q || \ 289 cseg->c_state == C_ON_SWAPIO_Q)) 290 291 292 #define C_SEG_WAKEUP_DONE(cseg) \ 293 MACRO_BEGIN \ 294 assert((cseg)->c_busy); \ 295 (cseg)->c_busy = 0; \ 296 assert((cseg)->c_busy_for_thread != NULL); \ 297 (cseg)->c_busy_for_thread = NULL; \ 298 if ((cseg)->c_wanted) { \ 299 (cseg)->c_wanted = 0; \ 300 thread_wakeup((event_t) (cseg)); \ 301 } \ 302 MACRO_END 303 304 #define C_SEG_BUSY(cseg) \ 305 MACRO_BEGIN \ 306 assert((cseg)->c_busy == 0); \ 307 (cseg)->c_busy = 1; \ 308 assert((cseg)->c_busy_for_thread == NULL); \ 309 (cseg)->c_busy_for_thread = current_thread(); \ 310 MACRO_END 311 312 313 extern vm_map_t compressor_map; 314 315 #if DEVELOPMENT || DEBUG 316 extern boolean_t write_protect_c_segs; 317 extern int vm_compressor_test_seg_wp; 318 319 #define C_SEG_MAKE_WRITEABLE(cseg) \ 320 MACRO_BEGIN \ 321 if (write_protect_c_segs) { \ 322 vm_map_protect(compressor_map, \ 323 (vm_map_offset_t)cseg->c_store.c_buffer, \ 324 (vm_map_offset_t)&cseg->c_store.c_buffer[C_SEG_BYTES_TO_OFFSET(c_seg_allocsize)],\ 325 VM_PROT_READ | VM_PROT_WRITE, \ 326 0); \ 327 } \ 328 MACRO_END 329 330 #define C_SEG_WRITE_PROTECT(cseg) \ 331 MACRO_BEGIN \ 332 if (write_protect_c_segs) { \ 333 vm_map_protect(compressor_map, \ 334 (vm_map_offset_t)cseg->c_store.c_buffer, \ 335 (vm_map_offset_t)&cseg->c_store.c_buffer[C_SEG_BYTES_TO_OFFSET(c_seg_allocsize)],\ 336 VM_PROT_READ, \ 337 0); \ 338 } \ 339 if (vm_compressor_test_seg_wp) { \ 340 volatile uint32_t vmtstmp = *(volatile uint32_t *)cseg->c_store.c_buffer; \ 341 *(volatile uint32_t *)cseg->c_store.c_buffer = 0xDEADABCD; \ 342 (void) vmtstmp; \ 343 } \ 344 MACRO_END 345 #endif 346 347 typedef struct c_segment *c_segment_t; 348 typedef struct c_slot *c_slot_t; 349 350 uint64_t vm_compressor_total_compressions(void); 351 void vm_wake_compactor_swapper(void); 352 void vm_run_compactor(void); 353 void vm_thrashing_jetsam_done(void); 354 void vm_consider_waking_compactor_swapper(void); 355 void vm_consider_swapping(void); 356 void vm_compressor_flush(void); 357 void c_seg_free(c_segment_t); 358 void c_seg_free_locked(c_segment_t); 359 void c_seg_insert_into_age_q(c_segment_t); 360 void c_seg_need_delayed_compaction(c_segment_t, boolean_t); 361 void c_seg_update_task_owner(c_segment_t, task_t); 362 363 void vm_decompressor_lock(void); 364 void vm_decompressor_unlock(void); 365 366 void vm_compressor_delay_trim(void); 367 void vm_compressor_do_warmup(void); 368 void vm_compressor_record_warmup_start(void); 369 void vm_compressor_record_warmup_end(void); 370 371 int vm_wants_task_throttled(task_t); 372 373 extern void vm_compaction_swapper_do_init(void); 374 extern void vm_compressor_swap_init(void); 375 extern lck_rw_t c_master_lock; 376 377 #if ENCRYPTED_SWAP 378 extern void vm_swap_decrypt(c_segment_t); 379 #endif /* ENCRYPTED_SWAP */ 380 381 extern int vm_swap_low_on_space(void); 382 extern int vm_swap_out_of_space(void); 383 extern kern_return_t vm_swap_get(c_segment_t, uint64_t, uint64_t); 384 extern void vm_swap_free(uint64_t); 385 extern void vm_swap_consider_defragmenting(int); 386 387 extern void c_seg_swapin_requeue(c_segment_t, boolean_t, boolean_t, boolean_t); 388 extern int c_seg_swapin(c_segment_t, boolean_t, boolean_t); 389 extern void c_seg_wait_on_busy(c_segment_t); 390 extern void c_seg_trim_tail(c_segment_t); 391 extern void c_seg_switch_state(c_segment_t, int, boolean_t); 392 393 extern boolean_t fastwake_recording_in_progress; 394 extern int compaction_swapper_inited; 395 extern int compaction_swapper_running; 396 extern uint64_t vm_swap_put_failures; 397 398 extern int c_overage_swapped_count; 399 extern int c_overage_swapped_limit; 400 401 extern queue_head_t c_minor_list_head; 402 extern queue_head_t c_age_list_head; 403 extern queue_head_t c_swapout_list_head; 404 extern queue_head_t c_swappedout_list_head; 405 extern queue_head_t c_swappedout_sparse_list_head; 406 407 extern uint32_t c_age_count; 408 extern uint32_t c_swapout_count; 409 extern uint32_t c_swappedout_count; 410 extern uint32_t c_swappedout_sparse_count; 411 412 extern int64_t compressor_bytes_used; 413 extern uint64_t first_c_segment_to_warm_generation_id; 414 extern uint64_t last_c_segment_to_warm_generation_id; 415 extern boolean_t hibernate_flushing; 416 extern boolean_t hibernate_no_swapspace; 417 extern boolean_t hibernate_in_progress_with_pinned_swap; 418 extern boolean_t hibernate_flush_timed_out; 419 extern uint32_t swapout_target_age; 420 421 extern void c_seg_insert_into_q(queue_head_t *, c_segment_t); 422 423 extern uint32_t vm_compressor_minorcompact_threshold_divisor; 424 extern uint32_t vm_compressor_majorcompact_threshold_divisor; 425 extern uint32_t vm_compressor_unthrottle_threshold_divisor; 426 extern uint32_t vm_compressor_catchup_threshold_divisor; 427 428 extern uint32_t vm_compressor_minorcompact_threshold_divisor_overridden; 429 extern uint32_t vm_compressor_majorcompact_threshold_divisor_overridden; 430 extern uint32_t vm_compressor_unthrottle_threshold_divisor_overridden; 431 extern uint32_t vm_compressor_catchup_threshold_divisor_overridden; 432 433 extern uint64_t vm_compressor_compute_elapsed_msecs(clock_sec_t, clock_nsec_t, clock_sec_t, clock_nsec_t); 434 435 extern void kdp_compressor_busy_find_owner(event64_t wait_event, thread_waitinfo_t *waitinfo); 436 437 #define PAGE_REPLACEMENT_DISALLOWED(enable) (enable == TRUE ? lck_rw_lock_shared(&c_master_lock) : lck_rw_done(&c_master_lock)) 438 #define PAGE_REPLACEMENT_ALLOWED(enable) (enable == TRUE ? lck_rw_lock_exclusive(&c_master_lock) : lck_rw_done(&c_master_lock)) 439 440 441 #define AVAILABLE_NON_COMPRESSED_MEMORY (vm_page_active_count + vm_page_inactive_count + vm_page_free_count + vm_page_speculative_count) 442 #define AVAILABLE_MEMORY (AVAILABLE_NON_COMPRESSED_MEMORY + VM_PAGE_COMPRESSOR_COUNT) 443 444 /* 445 * TODO, there may be a minor optimisation opportunity to replace these divisions 446 * with multiplies and shifts 447 * 448 * By multiplying by 10, the divisors can have more precision w/o resorting to floating point... a divisor specified as 25 is in reality a divide by 2.5 449 * By multiplying by 9, you get a number ~11% smaller which allows us to have another limit point derived from the same base 450 * By multiplying by 11, you get a number ~10% bigger which allows us to generate a reset limit derived from the same base which is useful for hysteresis 451 */ 452 453 #define VM_PAGE_COMPRESSOR_COMPACT_THRESHOLD (((AVAILABLE_MEMORY) * 10) / (vm_compressor_minorcompact_threshold_divisor ? vm_compressor_minorcompact_threshold_divisor : 10)) 454 #define VM_PAGE_COMPRESSOR_SWAP_THRESHOLD (((AVAILABLE_MEMORY) * 10) / (vm_compressor_majorcompact_threshold_divisor ? vm_compressor_majorcompact_threshold_divisor : 10)) 455 456 #define VM_PAGE_COMPRESSOR_SWAP_UNTHROTTLE_THRESHOLD (((AVAILABLE_MEMORY) * 10) / (vm_compressor_unthrottle_threshold_divisor ? vm_compressor_unthrottle_threshold_divisor : 10)) 457 #define VM_PAGE_COMPRESSOR_SWAP_RETHROTTLE_THRESHOLD (((AVAILABLE_MEMORY) * 11) / (vm_compressor_unthrottle_threshold_divisor ? vm_compressor_unthrottle_threshold_divisor : 11)) 458 459 #define VM_PAGE_COMPRESSOR_SWAP_HAS_CAUGHTUP_THRESHOLD (((AVAILABLE_MEMORY) * 11) / (vm_compressor_catchup_threshold_divisor ? vm_compressor_catchup_threshold_divisor : 11)) 460 #define VM_PAGE_COMPRESSOR_SWAP_CATCHUP_THRESHOLD (((AVAILABLE_MEMORY) * 10) / (vm_compressor_catchup_threshold_divisor ? vm_compressor_catchup_threshold_divisor : 10)) 461 #define VM_PAGE_COMPRESSOR_HARD_THROTTLE_THRESHOLD (((AVAILABLE_MEMORY) * 9) / (vm_compressor_catchup_threshold_divisor ? vm_compressor_catchup_threshold_divisor : 9)) 462 463 #if !XNU_TARGET_OS_OSX 464 #define AVAILABLE_NON_COMPRESSED_MIN 20000 465 #define COMPRESSOR_NEEDS_TO_SWAP() (((AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_SWAP_THRESHOLD) || \ 466 (AVAILABLE_NON_COMPRESSED_MEMORY < AVAILABLE_NON_COMPRESSED_MIN)) ? 1 : 0) 467 #else /* !XNU_TARGET_OS_OSX */ 468 #define COMPRESSOR_NEEDS_TO_SWAP() ((AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_SWAP_THRESHOLD) ? 1 : 0) 469 #endif /* !XNU_TARGET_OS_OSX */ 470 471 #define HARD_THROTTLE_LIMIT_REACHED() ((AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_HARD_THROTTLE_THRESHOLD) ? 1 : 0) 472 #define SWAPPER_NEEDS_TO_UNTHROTTLE() ((AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_SWAP_UNTHROTTLE_THRESHOLD) ? 1 : 0) 473 #define SWAPPER_NEEDS_TO_RETHROTTLE() ((AVAILABLE_NON_COMPRESSED_MEMORY > VM_PAGE_COMPRESSOR_SWAP_RETHROTTLE_THRESHOLD) ? 1 : 0) 474 #define SWAPPER_NEEDS_TO_CATCHUP() ((AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_SWAP_CATCHUP_THRESHOLD) ? 1 : 0) 475 #define SWAPPER_HAS_CAUGHTUP() ((AVAILABLE_NON_COMPRESSED_MEMORY > VM_PAGE_COMPRESSOR_SWAP_HAS_CAUGHTUP_THRESHOLD) ? 1 : 0) 476 #define COMPRESSOR_NEEDS_TO_MINOR_COMPACT() ((AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_COMPACT_THRESHOLD) ? 1 : 0) 477 478 479 #if !XNU_TARGET_OS_OSX 480 #define COMPRESSOR_FREE_RESERVED_LIMIT 28 481 #else /* !XNU_TARGET_OS_OSX */ 482 #define COMPRESSOR_FREE_RESERVED_LIMIT 128 483 #endif /* !XNU_TARGET_OS_OSX */ 484 485 uint32_t vm_compressor_get_encode_scratch_size(void) __pure2; 486 uint32_t vm_compressor_get_decode_scratch_size(void) __pure2; 487 488 #define COMPRESSOR_SCRATCH_BUF_SIZE vm_compressor_get_encode_scratch_size() 489 490 #if RECORD_THE_COMPRESSED_DATA 491 extern void c_compressed_record_init(void); 492 extern void c_compressed_record_write(char *, int); 493 #endif 494 495 extern lck_mtx_t c_list_lock_storage; 496 #define c_list_lock (&c_list_lock_storage) 497 498 #if DEVELOPMENT || DEBUG 499 extern uint32_t vm_ktrace_enabled; 500 501 #define VMKDBG(x, ...) \ 502 MACRO_BEGIN \ 503 if (vm_ktrace_enabled) { \ 504 KDBG(x, ## __VA_ARGS__);\ 505 } \ 506 MACRO_END 507 #endif 508