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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* internal.h: mm/ internal definitions |
3 | * | |
4 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. | |
5 | * Written by David Howells (dhowells@redhat.com) | |
1da177e4 | 6 | */ |
0f8053a5 NP |
7 | #ifndef __MM_INTERNAL_H |
8 | #define __MM_INTERNAL_H | |
9 | ||
29f175d1 | 10 | #include <linux/fs.h> |
0f8053a5 | 11 | #include <linux/mm.h> |
e9b61f19 | 12 | #include <linux/pagemap.h> |
edf14cdb | 13 | #include <linux/tracepoint-defs.h> |
1da177e4 | 14 | |
dd56b046 MG |
15 | /* |
16 | * The set of flags that only affect watermark checking and reclaim | |
17 | * behaviour. This is used by the MM to obey the caller constraints | |
18 | * about IO, FS and watermark checking while ignoring placement | |
19 | * hints such as HIGHMEM usage. | |
20 | */ | |
21 | #define GFP_RECLAIM_MASK (__GFP_RECLAIM|__GFP_HIGH|__GFP_IO|__GFP_FS|\ | |
dcda9b04 | 22 | __GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NOFAIL|\ |
e838a45f MG |
23 | __GFP_NORETRY|__GFP_MEMALLOC|__GFP_NOMEMALLOC|\ |
24 | __GFP_ATOMIC) | |
dd56b046 MG |
25 | |
26 | /* The GFP flags allowed during early boot */ | |
27 | #define GFP_BOOT_MASK (__GFP_BITS_MASK & ~(__GFP_RECLAIM|__GFP_IO|__GFP_FS)) | |
28 | ||
29 | /* Control allocation cpuset and node placement constraints */ | |
30 | #define GFP_CONSTRAINT_MASK (__GFP_HARDWALL|__GFP_THISNODE) | |
31 | ||
32 | /* Do not use these with a slab allocator */ | |
33 | #define GFP_SLAB_BUG_MASK (__GFP_DMA32|__GFP_HIGHMEM|~__GFP_BITS_MASK) | |
34 | ||
62906027 NP |
35 | void page_writeback_init(void); |
36 | ||
2b740303 | 37 | vm_fault_t do_swap_page(struct vm_fault *vmf); |
8a966ed7 | 38 | |
42b77728 JB |
39 | void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma, |
40 | unsigned long floor, unsigned long ceiling); | |
41 | ||
9c276cc6 | 42 | static inline bool can_madv_lru_vma(struct vm_area_struct *vma) |
23519073 KS |
43 | { |
44 | return !(vma->vm_flags & (VM_LOCKED|VM_HUGETLB|VM_PFNMAP)); | |
45 | } | |
46 | ||
aac45363 MH |
47 | void unmap_page_range(struct mmu_gather *tlb, |
48 | struct vm_area_struct *vma, | |
49 | unsigned long addr, unsigned long end, | |
50 | struct zap_details *details); | |
51 | ||
cee9a0c4 MWO |
52 | int force_page_cache_readahead(struct address_space *, struct file *, |
53 | pgoff_t index, unsigned long nr_to_read); | |
c534aa3f | 54 | extern unsigned int __do_page_cache_readahead(struct address_space *mapping, |
29f175d1 FF |
55 | struct file *filp, pgoff_t offset, unsigned long nr_to_read, |
56 | unsigned long lookahead_size); | |
57 | ||
58 | /* | |
59 | * Submit IO for the read-ahead request in file_ra_state. | |
60 | */ | |
61 | static inline unsigned long ra_submit(struct file_ra_state *ra, | |
62 | struct address_space *mapping, struct file *filp) | |
63 | { | |
64 | return __do_page_cache_readahead(mapping, filp, | |
65 | ra->start, ra->size, ra->async_size); | |
66 | } | |
67 | ||
1eb6234e YS |
68 | /** |
69 | * page_evictable - test whether a page is evictable | |
70 | * @page: the page to test | |
71 | * | |
72 | * Test whether page is evictable--i.e., should be placed on active/inactive | |
73 | * lists vs unevictable list. | |
74 | * | |
75 | * Reasons page might not be evictable: | |
76 | * (1) page's mapping marked unevictable | |
77 | * (2) page is part of an mlocked VMA | |
78 | * | |
79 | */ | |
80 | static inline bool page_evictable(struct page *page) | |
81 | { | |
82 | bool ret; | |
83 | ||
84 | /* Prevent address_space of inode and swap cache from being freed */ | |
85 | rcu_read_lock(); | |
86 | ret = !mapping_unevictable(page_mapping(page)) && !PageMlocked(page); | |
87 | rcu_read_unlock(); | |
88 | return ret; | |
89 | } | |
90 | ||
7835e98b | 91 | /* |
0139aa7b | 92 | * Turn a non-refcounted page (->_refcount == 0) into refcounted with |
7835e98b NP |
93 | * a count of one. |
94 | */ | |
95 | static inline void set_page_refcounted(struct page *page) | |
96 | { | |
309381fe | 97 | VM_BUG_ON_PAGE(PageTail(page), page); |
fe896d18 | 98 | VM_BUG_ON_PAGE(page_ref_count(page), page); |
77a8a788 | 99 | set_page_count(page, 1); |
77a8a788 NP |
100 | } |
101 | ||
03f6462a HD |
102 | extern unsigned long highest_memmap_pfn; |
103 | ||
c73322d0 JW |
104 | /* |
105 | * Maximum number of reclaim retries without progress before the OOM | |
106 | * killer is consider the only way forward. | |
107 | */ | |
108 | #define MAX_RECLAIM_RETRIES 16 | |
109 | ||
894bc310 LS |
110 | /* |
111 | * in mm/vmscan.c: | |
112 | */ | |
62695a84 | 113 | extern int isolate_lru_page(struct page *page); |
894bc310 | 114 | extern void putback_lru_page(struct page *page); |
62695a84 | 115 | |
6219049a BL |
116 | /* |
117 | * in mm/rmap.c: | |
118 | */ | |
119 | extern pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address); | |
120 | ||
894bc310 LS |
121 | /* |
122 | * in mm/page_alloc.c | |
123 | */ | |
3c605096 | 124 | |
1a6d53a1 VB |
125 | /* |
126 | * Structure for holding the mostly immutable allocation parameters passed | |
127 | * between functions involved in allocations, including the alloc_pages* | |
128 | * family of functions. | |
129 | * | |
130 | * nodemask, migratetype and high_zoneidx are initialized only once in | |
131 | * __alloc_pages_nodemask() and then never change. | |
132 | * | |
133 | * zonelist, preferred_zone and classzone_idx are set first in | |
134 | * __alloc_pages_nodemask() for the fast path, and might be later changed | |
135 | * in __alloc_pages_slowpath(). All other functions pass the whole strucure | |
136 | * by a const pointer. | |
137 | */ | |
138 | struct alloc_context { | |
139 | struct zonelist *zonelist; | |
140 | nodemask_t *nodemask; | |
c33d6c06 | 141 | struct zoneref *preferred_zoneref; |
1a6d53a1 VB |
142 | int migratetype; |
143 | enum zone_type high_zoneidx; | |
c9ab0c4f | 144 | bool spread_dirty_pages; |
1a6d53a1 VB |
145 | }; |
146 | ||
93ea9964 MG |
147 | #define ac_classzone_idx(ac) zonelist_zone_idx(ac->preferred_zoneref) |
148 | ||
3c605096 JK |
149 | /* |
150 | * Locate the struct page for both the matching buddy in our | |
151 | * pair (buddy1) and the combined O(n+1) page they form (page). | |
152 | * | |
153 | * 1) Any buddy B1 will have an order O twin B2 which satisfies | |
154 | * the following equation: | |
155 | * B2 = B1 ^ (1 << O) | |
156 | * For example, if the starting buddy (buddy2) is #8 its order | |
157 | * 1 buddy is #10: | |
158 | * B2 = 8 ^ (1 << 1) = 8 ^ 2 = 10 | |
159 | * | |
160 | * 2) Any buddy B will have an order O+1 parent P which | |
161 | * satisfies the following equation: | |
162 | * P = B & ~(1 << O) | |
163 | * | |
164 | * Assumption: *_mem_map is contiguous at least up to MAX_ORDER | |
165 | */ | |
166 | static inline unsigned long | |
76741e77 | 167 | __find_buddy_pfn(unsigned long page_pfn, unsigned int order) |
3c605096 | 168 | { |
76741e77 | 169 | return page_pfn ^ (1 << order); |
3c605096 JK |
170 | } |
171 | ||
7cf91a98 JK |
172 | extern struct page *__pageblock_pfn_to_page(unsigned long start_pfn, |
173 | unsigned long end_pfn, struct zone *zone); | |
174 | ||
175 | static inline struct page *pageblock_pfn_to_page(unsigned long start_pfn, | |
176 | unsigned long end_pfn, struct zone *zone) | |
177 | { | |
178 | if (zone->contiguous) | |
179 | return pfn_to_page(start_pfn); | |
180 | ||
181 | return __pageblock_pfn_to_page(start_pfn, end_pfn, zone); | |
182 | } | |
183 | ||
3c605096 | 184 | extern int __isolate_free_page(struct page *page, unsigned int order); |
624f58d8 AD |
185 | extern void __putback_isolated_page(struct page *page, unsigned int order, |
186 | int mt); | |
7c2ee349 | 187 | extern void memblock_free_pages(struct page *page, unsigned long pfn, |
d70ddd7a | 188 | unsigned int order); |
a9cd410a | 189 | extern void __free_pages_core(struct page *page, unsigned int order); |
d00181b9 | 190 | extern void prep_compound_page(struct page *page, unsigned int order); |
46f24fd8 JK |
191 | extern void post_alloc_hook(struct page *page, unsigned int order, |
192 | gfp_t gfp_flags); | |
42aa83cb | 193 | extern int user_min_free_kbytes; |
20a0307c | 194 | |
68265390 MG |
195 | extern void zone_pcp_update(struct zone *zone); |
196 | extern void zone_pcp_reset(struct zone *zone); | |
197 | ||
ff9543fd MN |
198 | #if defined CONFIG_COMPACTION || defined CONFIG_CMA |
199 | ||
200 | /* | |
201 | * in mm/compaction.c | |
202 | */ | |
203 | /* | |
204 | * compact_control is used to track pages being migrated and the free pages | |
205 | * they are being migrated to during memory compaction. The free_pfn starts | |
206 | * at the end of a zone and migrate_pfn begins at the start. Movable pages | |
207 | * are moved to the end of a zone during a compaction run and the run | |
208 | * completes when free_pfn <= migrate_pfn | |
209 | */ | |
210 | struct compact_control { | |
211 | struct list_head freepages; /* List of free pages to migrate to */ | |
212 | struct list_head migratepages; /* List of pages being migrated */ | |
c5fbd937 MG |
213 | unsigned int nr_freepages; /* Number of isolated free pages */ |
214 | unsigned int nr_migratepages; /* Number of pages to migrate */ | |
ff9543fd MN |
215 | unsigned long free_pfn; /* isolate_freepages search base */ |
216 | unsigned long migrate_pfn; /* isolate_migratepages search base */ | |
70b44595 | 217 | unsigned long fast_start_pfn; /* a pfn to start linear scan from */ |
c5943b9c MG |
218 | struct zone *zone; |
219 | unsigned long total_migrate_scanned; | |
220 | unsigned long total_free_scanned; | |
dbe2d4e4 MG |
221 | unsigned short fast_search_fail;/* failures to use free list searches */ |
222 | short search_order; /* order to start a fast search at */ | |
f25ba6dc VB |
223 | const gfp_t gfp_mask; /* gfp mask of a direct compactor */ |
224 | int order; /* order a direct compactor needs */ | |
d39773a0 | 225 | int migratetype; /* migratetype of direct compactor */ |
f25ba6dc VB |
226 | const unsigned int alloc_flags; /* alloc flags of a direct compactor */ |
227 | const int classzone_idx; /* zone index of a direct compactor */ | |
e0b9daeb | 228 | enum migrate_mode mode; /* Async or sync migration mode */ |
bb13ffeb | 229 | bool ignore_skip_hint; /* Scan blocks even if marked skip */ |
2583d671 | 230 | bool no_set_skip_hint; /* Don't mark blocks for skipping */ |
9f7e3387 | 231 | bool ignore_block_suitable; /* Scan blocks considered unsuitable */ |
accf6242 | 232 | bool direct_compaction; /* False from kcompactd or /proc/... */ |
06ed2998 | 233 | bool whole_zone; /* Whole zone should/has been scanned */ |
c3486f53 | 234 | bool contended; /* Signal lock or sched contention */ |
804d3121 | 235 | bool rescan; /* Rescanning the same pageblock */ |
b06eda09 | 236 | bool alloc_contig; /* alloc_contig_range allocation */ |
ff9543fd MN |
237 | }; |
238 | ||
5e1f0f09 MG |
239 | /* |
240 | * Used in direct compaction when a page should be taken from the freelists | |
241 | * immediately when one is created during the free path. | |
242 | */ | |
243 | struct capture_control { | |
244 | struct compact_control *cc; | |
245 | struct page *page; | |
246 | }; | |
247 | ||
ff9543fd | 248 | unsigned long |
bb13ffeb MG |
249 | isolate_freepages_range(struct compact_control *cc, |
250 | unsigned long start_pfn, unsigned long end_pfn); | |
ff9543fd | 251 | unsigned long |
edc2ca61 VB |
252 | isolate_migratepages_range(struct compact_control *cc, |
253 | unsigned long low_pfn, unsigned long end_pfn); | |
2149cdae JK |
254 | int find_suitable_fallback(struct free_area *area, unsigned int order, |
255 | int migratetype, bool only_stealable, bool *can_steal); | |
ff9543fd MN |
256 | |
257 | #endif | |
0f8053a5 | 258 | |
48f13bf3 | 259 | /* |
6c14466c MG |
260 | * This function returns the order of a free page in the buddy system. In |
261 | * general, page_zone(page)->lock must be held by the caller to prevent the | |
262 | * page from being allocated in parallel and returning garbage as the order. | |
263 | * If a caller does not hold page_zone(page)->lock, it must guarantee that the | |
99c0fd5e VB |
264 | * page cannot be allocated or merged in parallel. Alternatively, it must |
265 | * handle invalid values gracefully, and use page_order_unsafe() below. | |
48f13bf3 | 266 | */ |
d00181b9 | 267 | static inline unsigned int page_order(struct page *page) |
48f13bf3 | 268 | { |
572438f9 | 269 | /* PageBuddy() must be checked by the caller */ |
48f13bf3 MG |
270 | return page_private(page); |
271 | } | |
b5a0e011 | 272 | |
99c0fd5e VB |
273 | /* |
274 | * Like page_order(), but for callers who cannot afford to hold the zone lock. | |
275 | * PageBuddy() should be checked first by the caller to minimize race window, | |
276 | * and invalid values must be handled gracefully. | |
277 | * | |
4db0c3c2 | 278 | * READ_ONCE is used so that if the caller assigns the result into a local |
99c0fd5e VB |
279 | * variable and e.g. tests it for valid range before using, the compiler cannot |
280 | * decide to remove the variable and inline the page_private(page) multiple | |
281 | * times, potentially observing different values in the tests and the actual | |
282 | * use of the result. | |
283 | */ | |
4db0c3c2 | 284 | #define page_order_unsafe(page) READ_ONCE(page_private(page)) |
99c0fd5e | 285 | |
4bbd4c77 KS |
286 | static inline bool is_cow_mapping(vm_flags_t flags) |
287 | { | |
288 | return (flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE; | |
289 | } | |
290 | ||
30bdbb78 KK |
291 | /* |
292 | * These three helpers classifies VMAs for virtual memory accounting. | |
293 | */ | |
294 | ||
295 | /* | |
296 | * Executable code area - executable, not writable, not stack | |
297 | */ | |
d977d56c KK |
298 | static inline bool is_exec_mapping(vm_flags_t flags) |
299 | { | |
30bdbb78 | 300 | return (flags & (VM_EXEC | VM_WRITE | VM_STACK)) == VM_EXEC; |
d977d56c KK |
301 | } |
302 | ||
30bdbb78 KK |
303 | /* |
304 | * Stack area - atomatically grows in one direction | |
305 | * | |
306 | * VM_GROWSUP / VM_GROWSDOWN VMAs are always private anonymous: | |
307 | * do_mmap() forbids all other combinations. | |
308 | */ | |
d977d56c KK |
309 | static inline bool is_stack_mapping(vm_flags_t flags) |
310 | { | |
30bdbb78 | 311 | return (flags & VM_STACK) == VM_STACK; |
d977d56c KK |
312 | } |
313 | ||
30bdbb78 KK |
314 | /* |
315 | * Data area - private, writable, not stack | |
316 | */ | |
d977d56c KK |
317 | static inline bool is_data_mapping(vm_flags_t flags) |
318 | { | |
30bdbb78 | 319 | return (flags & (VM_WRITE | VM_SHARED | VM_STACK)) == VM_WRITE; |
d977d56c KK |
320 | } |
321 | ||
6038def0 NK |
322 | /* mm/util.c */ |
323 | void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma, | |
aba6dfb7 | 324 | struct vm_area_struct *prev); |
1b9fc5b2 | 325 | void __vma_unlink_list(struct mm_struct *mm, struct vm_area_struct *vma); |
6038def0 | 326 | |
af8e3354 | 327 | #ifdef CONFIG_MMU |
fc05f566 | 328 | extern long populate_vma_page_range(struct vm_area_struct *vma, |
cea10a19 | 329 | unsigned long start, unsigned long end, int *nonblocking); |
af8e3354 HD |
330 | extern void munlock_vma_pages_range(struct vm_area_struct *vma, |
331 | unsigned long start, unsigned long end); | |
332 | static inline void munlock_vma_pages_all(struct vm_area_struct *vma) | |
333 | { | |
334 | munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end); | |
335 | } | |
336 | ||
b291f000 | 337 | /* |
73848b46 | 338 | * must be called with vma's mmap_sem held for read or write, and page locked. |
b291f000 NP |
339 | */ |
340 | extern void mlock_vma_page(struct page *page); | |
ff6a6da6 | 341 | extern unsigned int munlock_vma_page(struct page *page); |
b291f000 NP |
342 | |
343 | /* | |
344 | * Clear the page's PageMlocked(). This can be useful in a situation where | |
345 | * we want to unconditionally remove a page from the pagecache -- e.g., | |
346 | * on truncation or freeing. | |
347 | * | |
348 | * It is legal to call this function for any page, mlocked or not. | |
349 | * If called for a page that is still mapped by mlocked vmas, all we do | |
350 | * is revert to lazy LRU behaviour -- semantics are not broken. | |
351 | */ | |
e6c509f8 | 352 | extern void clear_page_mlock(struct page *page); |
b291f000 NP |
353 | |
354 | /* | |
51afb12b HD |
355 | * mlock_migrate_page - called only from migrate_misplaced_transhuge_page() |
356 | * (because that does not go through the full procedure of migration ptes): | |
357 | * to migrate the Mlocked page flag; update statistics. | |
b291f000 NP |
358 | */ |
359 | static inline void mlock_migrate_page(struct page *newpage, struct page *page) | |
360 | { | |
5344b7e6 | 361 | if (TestClearPageMlocked(page)) { |
b32967ff | 362 | int nr_pages = hpage_nr_pages(page); |
5344b7e6 | 363 | |
51afb12b | 364 | /* Holding pmd lock, no change in irq context: __mod is safe */ |
b32967ff | 365 | __mod_zone_page_state(page_zone(page), NR_MLOCK, -nr_pages); |
b291f000 | 366 | SetPageMlocked(newpage); |
b32967ff | 367 | __mod_zone_page_state(page_zone(newpage), NR_MLOCK, nr_pages); |
5344b7e6 | 368 | } |
b291f000 NP |
369 | } |
370 | ||
f55e1014 | 371 | extern pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma); |
b32967ff | 372 | |
e9b61f19 KS |
373 | /* |
374 | * At what user virtual address is page expected in @vma? | |
375 | */ | |
376 | static inline unsigned long | |
377 | __vma_address(struct page *page, struct vm_area_struct *vma) | |
378 | { | |
379 | pgoff_t pgoff = page_to_pgoff(page); | |
380 | return vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT); | |
381 | } | |
382 | ||
383 | static inline unsigned long | |
384 | vma_address(struct page *page, struct vm_area_struct *vma) | |
385 | { | |
a8fa41ad KS |
386 | unsigned long start, end; |
387 | ||
388 | start = __vma_address(page, vma); | |
389 | end = start + PAGE_SIZE * (hpage_nr_pages(page) - 1); | |
e9b61f19 KS |
390 | |
391 | /* page should be within @vma mapping range */ | |
a8fa41ad | 392 | VM_BUG_ON_VMA(end < vma->vm_start || start >= vma->vm_end, vma); |
e9b61f19 | 393 | |
a8fa41ad | 394 | return max(start, vma->vm_start); |
e9b61f19 KS |
395 | } |
396 | ||
89b15332 JW |
397 | static inline struct file *maybe_unlock_mmap_for_io(struct vm_fault *vmf, |
398 | struct file *fpin) | |
399 | { | |
400 | int flags = vmf->flags; | |
401 | ||
402 | if (fpin) | |
403 | return fpin; | |
404 | ||
405 | /* | |
406 | * FAULT_FLAG_RETRY_NOWAIT means we don't want to wait on page locks or | |
407 | * anything, so we only pin the file and drop the mmap_sem if only | |
4064b982 | 408 | * FAULT_FLAG_ALLOW_RETRY is set, while this is the first attempt. |
89b15332 | 409 | */ |
4064b982 PX |
410 | if (fault_flag_allow_retry_first(flags) && |
411 | !(flags & FAULT_FLAG_RETRY_NOWAIT)) { | |
89b15332 JW |
412 | fpin = get_file(vmf->vma->vm_file); |
413 | up_read(&vmf->vma->vm_mm->mmap_sem); | |
414 | } | |
415 | return fpin; | |
416 | } | |
417 | ||
af8e3354 | 418 | #else /* !CONFIG_MMU */ |
b291f000 NP |
419 | static inline void clear_page_mlock(struct page *page) { } |
420 | static inline void mlock_vma_page(struct page *page) { } | |
421 | static inline void mlock_migrate_page(struct page *new, struct page *old) { } | |
422 | ||
af8e3354 | 423 | #endif /* !CONFIG_MMU */ |
894bc310 | 424 | |
69d177c2 AW |
425 | /* |
426 | * Return the mem_map entry representing the 'offset' subpage within | |
427 | * the maximally aligned gigantic page 'base'. Handle any discontiguity | |
428 | * in the mem_map at MAX_ORDER_NR_PAGES boundaries. | |
429 | */ | |
430 | static inline struct page *mem_map_offset(struct page *base, int offset) | |
431 | { | |
432 | if (unlikely(offset >= MAX_ORDER_NR_PAGES)) | |
bc7f84c0 | 433 | return nth_page(base, offset); |
69d177c2 AW |
434 | return base + offset; |
435 | } | |
436 | ||
437 | /* | |
25985edc | 438 | * Iterator over all subpages within the maximally aligned gigantic |
69d177c2 AW |
439 | * page 'base'. Handle any discontiguity in the mem_map. |
440 | */ | |
441 | static inline struct page *mem_map_next(struct page *iter, | |
442 | struct page *base, int offset) | |
443 | { | |
444 | if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) { | |
445 | unsigned long pfn = page_to_pfn(base) + offset; | |
446 | if (!pfn_valid(pfn)) | |
447 | return NULL; | |
448 | return pfn_to_page(pfn); | |
449 | } | |
450 | return iter + 1; | |
451 | } | |
452 | ||
6b74ab97 MG |
453 | /* Memory initialisation debug and verification */ |
454 | enum mminit_level { | |
455 | MMINIT_WARNING, | |
456 | MMINIT_VERIFY, | |
457 | MMINIT_TRACE | |
458 | }; | |
459 | ||
460 | #ifdef CONFIG_DEBUG_MEMORY_INIT | |
461 | ||
462 | extern int mminit_loglevel; | |
463 | ||
464 | #define mminit_dprintk(level, prefix, fmt, arg...) \ | |
465 | do { \ | |
466 | if (level < mminit_loglevel) { \ | |
fc5199d1 | 467 | if (level <= MMINIT_WARNING) \ |
1170532b | 468 | pr_warn("mminit::" prefix " " fmt, ##arg); \ |
fc5199d1 RV |
469 | else \ |
470 | printk(KERN_DEBUG "mminit::" prefix " " fmt, ##arg); \ | |
6b74ab97 MG |
471 | } \ |
472 | } while (0) | |
473 | ||
708614e6 | 474 | extern void mminit_verify_pageflags_layout(void); |
68ad8df4 | 475 | extern void mminit_verify_zonelist(void); |
6b74ab97 MG |
476 | #else |
477 | ||
478 | static inline void mminit_dprintk(enum mminit_level level, | |
479 | const char *prefix, const char *fmt, ...) | |
480 | { | |
481 | } | |
482 | ||
708614e6 MG |
483 | static inline void mminit_verify_pageflags_layout(void) |
484 | { | |
485 | } | |
486 | ||
68ad8df4 MG |
487 | static inline void mminit_verify_zonelist(void) |
488 | { | |
489 | } | |
6b74ab97 | 490 | #endif /* CONFIG_DEBUG_MEMORY_INIT */ |
2dbb51c4 MG |
491 | |
492 | /* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */ | |
493 | #if defined(CONFIG_SPARSEMEM) | |
494 | extern void mminit_validate_memmodel_limits(unsigned long *start_pfn, | |
495 | unsigned long *end_pfn); | |
496 | #else | |
497 | static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn, | |
498 | unsigned long *end_pfn) | |
499 | { | |
500 | } | |
501 | #endif /* CONFIG_SPARSEMEM */ | |
502 | ||
a5f5f91d MG |
503 | #define NODE_RECLAIM_NOSCAN -2 |
504 | #define NODE_RECLAIM_FULL -1 | |
505 | #define NODE_RECLAIM_SOME 0 | |
506 | #define NODE_RECLAIM_SUCCESS 1 | |
7c116f2b | 507 | |
8b09549c WY |
508 | #ifdef CONFIG_NUMA |
509 | extern int node_reclaim(struct pglist_data *, gfp_t, unsigned int); | |
510 | #else | |
511 | static inline int node_reclaim(struct pglist_data *pgdat, gfp_t mask, | |
512 | unsigned int order) | |
513 | { | |
514 | return NODE_RECLAIM_NOSCAN; | |
515 | } | |
516 | #endif | |
517 | ||
31d3d348 WF |
518 | extern int hwpoison_filter(struct page *p); |
519 | ||
7c116f2b WF |
520 | extern u32 hwpoison_filter_dev_major; |
521 | extern u32 hwpoison_filter_dev_minor; | |
478c5ffc WF |
522 | extern u64 hwpoison_filter_flags_mask; |
523 | extern u64 hwpoison_filter_flags_value; | |
4fd466eb | 524 | extern u64 hwpoison_filter_memcg; |
1bfe5feb | 525 | extern u32 hwpoison_filter_enable; |
eb36c587 | 526 | |
dc0ef0df | 527 | extern unsigned long __must_check vm_mmap_pgoff(struct file *, unsigned long, |
eb36c587 | 528 | unsigned long, unsigned long, |
9fbeb5ab | 529 | unsigned long, unsigned long); |
ca57df79 XQ |
530 | |
531 | extern void set_pageblock_order(void); | |
02c6de8d MK |
532 | unsigned long reclaim_clean_pages_from_list(struct zone *zone, |
533 | struct list_head *page_list); | |
d95ea5d1 BZ |
534 | /* The ALLOC_WMARK bits are used as an index to zone->watermark */ |
535 | #define ALLOC_WMARK_MIN WMARK_MIN | |
536 | #define ALLOC_WMARK_LOW WMARK_LOW | |
537 | #define ALLOC_WMARK_HIGH WMARK_HIGH | |
538 | #define ALLOC_NO_WATERMARKS 0x04 /* don't check watermarks at all */ | |
539 | ||
540 | /* Mask to get the watermark bits */ | |
541 | #define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1) | |
542 | ||
cd04ae1e MH |
543 | /* |
544 | * Only MMU archs have async oom victim reclaim - aka oom_reaper so we | |
545 | * cannot assume a reduced access to memory reserves is sufficient for | |
546 | * !MMU | |
547 | */ | |
548 | #ifdef CONFIG_MMU | |
549 | #define ALLOC_OOM 0x08 | |
550 | #else | |
551 | #define ALLOC_OOM ALLOC_NO_WATERMARKS | |
552 | #endif | |
553 | ||
6bb15450 MG |
554 | #define ALLOC_HARDER 0x10 /* try to alloc harder */ |
555 | #define ALLOC_HIGH 0x20 /* __GFP_HIGH set */ | |
556 | #define ALLOC_CPUSET 0x40 /* check for correct cpuset */ | |
557 | #define ALLOC_CMA 0x80 /* allow allocations from CMA areas */ | |
558 | #ifdef CONFIG_ZONE_DMA32 | |
559 | #define ALLOC_NOFRAGMENT 0x100 /* avoid mixing pageblock types */ | |
560 | #else | |
561 | #define ALLOC_NOFRAGMENT 0x0 | |
562 | #endif | |
736838e9 | 563 | #define ALLOC_KSWAPD 0x800 /* allow waking of kswapd, __GFP_KSWAPD_RECLAIM set */ |
d95ea5d1 | 564 | |
72b252ae MG |
565 | enum ttu_flags; |
566 | struct tlbflush_unmap_batch; | |
567 | ||
ce612879 MH |
568 | |
569 | /* | |
570 | * only for MM internal work items which do not depend on | |
571 | * any allocations or locks which might depend on allocations | |
572 | */ | |
573 | extern struct workqueue_struct *mm_percpu_wq; | |
574 | ||
72b252ae MG |
575 | #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH |
576 | void try_to_unmap_flush(void); | |
d950c947 | 577 | void try_to_unmap_flush_dirty(void); |
3ea27719 | 578 | void flush_tlb_batched_pending(struct mm_struct *mm); |
72b252ae MG |
579 | #else |
580 | static inline void try_to_unmap_flush(void) | |
581 | { | |
582 | } | |
d950c947 MG |
583 | static inline void try_to_unmap_flush_dirty(void) |
584 | { | |
585 | } | |
3ea27719 MG |
586 | static inline void flush_tlb_batched_pending(struct mm_struct *mm) |
587 | { | |
588 | } | |
72b252ae | 589 | #endif /* CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH */ |
edf14cdb VB |
590 | |
591 | extern const struct trace_print_flags pageflag_names[]; | |
592 | extern const struct trace_print_flags vmaflag_names[]; | |
593 | extern const struct trace_print_flags gfpflag_names[]; | |
594 | ||
a6ffdc07 XQ |
595 | static inline bool is_migrate_highatomic(enum migratetype migratetype) |
596 | { | |
597 | return migratetype == MIGRATE_HIGHATOMIC; | |
598 | } | |
599 | ||
600 | static inline bool is_migrate_highatomic_page(struct page *page) | |
601 | { | |
602 | return get_pageblock_migratetype(page) == MIGRATE_HIGHATOMIC; | |
603 | } | |
604 | ||
72675e13 | 605 | void setup_zone_pageset(struct zone *zone); |
666feb21 | 606 | extern struct page *alloc_new_node_page(struct page *page, unsigned long node); |
db971418 | 607 | #endif /* __MM_INTERNAL_H */ |