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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* internal.h: mm/ internal definitions
2 *
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
Nick Piggin0f8053a2006-03-22 00:08:33 -080011#ifndef __MM_INTERNAL_H
12#define __MM_INTERNAL_H
13
Fabian Frederick29f175d2014-04-07 15:37:55 -070014#include <linux/fs.h>
Nick Piggin0f8053a2006-03-22 00:08:33 -080015#include <linux/mm.h>
Kirill A. Shutemove9b61f12016-01-15 16:54:10 -080016#include <linux/pagemap.h>
Vlastimil Babkaedf14cd2016-03-15 14:55:56 -070017#include <linux/tracepoint-defs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
Mel Gormandd56b042015-11-06 16:28:43 -080019/*
20 * The set of flags that only affect watermark checking and reclaim
21 * behaviour. This is used by the MM to obey the caller constraints
22 * about IO, FS and watermark checking while ignoring placement
23 * hints such as HIGHMEM usage.
24 */
25#define GFP_RECLAIM_MASK (__GFP_RECLAIM|__GFP_HIGH|__GFP_IO|__GFP_FS|\
26 __GFP_NOWARN|__GFP_REPEAT|__GFP_NOFAIL|\
Mel Gormane838a452016-06-24 14:49:37 -070027 __GFP_NORETRY|__GFP_MEMALLOC|__GFP_NOMEMALLOC|\
28 __GFP_ATOMIC)
Mel Gormandd56b042015-11-06 16:28:43 -080029
30/* The GFP flags allowed during early boot */
31#define GFP_BOOT_MASK (__GFP_BITS_MASK & ~(__GFP_RECLAIM|__GFP_IO|__GFP_FS))
32
33/* Control allocation cpuset and node placement constraints */
34#define GFP_CONSTRAINT_MASK (__GFP_HARDWALL|__GFP_THISNODE)
35
36/* Do not use these with a slab allocator */
37#define GFP_SLAB_BUG_MASK (__GFP_DMA32|__GFP_HIGHMEM|~__GFP_BITS_MASK)
38
Kirill A. Shutemovbae473a2016-07-26 15:25:20 -070039int do_swap_page(struct fault_env *fe, pte_t orig_pte);
Ebru Akagunduz8a966ed2016-07-26 15:25:03 -070040
Jan Beulich42b77722008-07-23 21:27:10 -070041void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
42 unsigned long floor, unsigned long ceiling);
43
Michal Hockoaac45362016-03-25 14:20:24 -070044void unmap_page_range(struct mmu_gather *tlb,
45 struct vm_area_struct *vma,
46 unsigned long addr, unsigned long end,
47 struct zap_details *details);
48
Fabian Frederick29f175d2014-04-07 15:37:55 -070049extern int __do_page_cache_readahead(struct address_space *mapping,
50 struct file *filp, pgoff_t offset, unsigned long nr_to_read,
51 unsigned long lookahead_size);
52
53/*
54 * Submit IO for the read-ahead request in file_ra_state.
55 */
56static inline unsigned long ra_submit(struct file_ra_state *ra,
57 struct address_space *mapping, struct file *filp)
58{
59 return __do_page_cache_readahead(mapping, filp,
60 ra->start, ra->size, ra->async_size);
61}
62
Nick Piggin7835e982006-03-22 00:08:40 -080063/*
Joonsoo Kim0139aa72016-05-19 17:10:49 -070064 * Turn a non-refcounted page (->_refcount == 0) into refcounted with
Nick Piggin7835e982006-03-22 00:08:40 -080065 * a count of one.
66 */
67static inline void set_page_refcounted(struct page *page)
68{
Sasha Levin309381fea2014-01-23 15:52:54 -080069 VM_BUG_ON_PAGE(PageTail(page), page);
Joonsoo Kimfe896d12016-03-17 14:19:26 -070070 VM_BUG_ON_PAGE(page_ref_count(page), page);
Nick Piggin77a8a782006-01-06 00:10:57 -080071 set_page_count(page, 1);
Nick Piggin77a8a782006-01-06 00:10:57 -080072}
73
Hugh Dickins03f64622009-09-21 17:03:35 -070074extern unsigned long highest_memmap_pfn;
75
Lee Schermerhorn894bc312008-10-18 20:26:39 -070076/*
Johannes Weiner19a7db12017-05-03 14:51:51 -070077 * Maximum number of reclaim retries without progress before the OOM
78 * killer is consider the only way forward.
79 */
80#define MAX_RECLAIM_RETRIES 16
81
82/*
Lee Schermerhorn894bc312008-10-18 20:26:39 -070083 * in mm/vmscan.c:
84 */
Nick Piggin62695a82008-10-18 20:26:09 -070085extern int isolate_lru_page(struct page *page);
Lee Schermerhorn894bc312008-10-18 20:26:39 -070086extern void putback_lru_page(struct page *page);
Mel Gorman599d0c92016-07-28 15:45:31 -070087extern bool pgdat_reclaimable(struct pglist_data *pgdat);
Nick Piggin62695a82008-10-18 20:26:09 -070088
Lee Schermerhorn894bc312008-10-18 20:26:39 -070089/*
Bob Liu62190492012-12-11 16:00:37 -080090 * in mm/rmap.c:
91 */
92extern pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address);
93
94/*
Lee Schermerhorn894bc312008-10-18 20:26:39 -070095 * in mm/page_alloc.c
96 */
Joonsoo Kim3c605092014-11-13 15:19:21 -080097
98/*
Vlastimil Babka1a6d53a2015-02-11 15:25:44 -080099 * Structure for holding the mostly immutable allocation parameters passed
100 * between functions involved in allocations, including the alloc_pages*
101 * family of functions.
102 *
103 * nodemask, migratetype and high_zoneidx are initialized only once in
104 * __alloc_pages_nodemask() and then never change.
105 *
106 * zonelist, preferred_zone and classzone_idx are set first in
107 * __alloc_pages_nodemask() for the fast path, and might be later changed
108 * in __alloc_pages_slowpath(). All other functions pass the whole strucure
109 * by a const pointer.
110 */
111struct alloc_context {
112 struct zonelist *zonelist;
113 nodemask_t *nodemask;
Mel Gormanc33d6c02016-05-19 17:14:10 -0700114 struct zoneref *preferred_zoneref;
Vlastimil Babka1a6d53a2015-02-11 15:25:44 -0800115 int migratetype;
116 enum zone_type high_zoneidx;
Mel Gormanc9ab0c42015-11-06 16:28:12 -0800117 bool spread_dirty_pages;
Vlastimil Babka1a6d53a2015-02-11 15:25:44 -0800118};
119
Mel Gorman93ea9962016-05-19 17:14:13 -0700120#define ac_classzone_idx(ac) zonelist_zone_idx(ac->preferred_zoneref)
121
Vlastimil Babka1a6d53a2015-02-11 15:25:44 -0800122/*
Joonsoo Kim3c605092014-11-13 15:19:21 -0800123 * Locate the struct page for both the matching buddy in our
124 * pair (buddy1) and the combined O(n+1) page they form (page).
125 *
126 * 1) Any buddy B1 will have an order O twin B2 which satisfies
127 * the following equation:
128 * B2 = B1 ^ (1 << O)
129 * For example, if the starting buddy (buddy2) is #8 its order
130 * 1 buddy is #10:
131 * B2 = 8 ^ (1 << 1) = 8 ^ 2 = 10
132 *
133 * 2) Any buddy B will have an order O+1 parent P which
134 * satisfies the following equation:
135 * P = B & ~(1 << O)
136 *
137 * Assumption: *_mem_map is contiguous at least up to MAX_ORDER
138 */
139static inline unsigned long
140__find_buddy_index(unsigned long page_idx, unsigned int order)
141{
142 return page_idx ^ (1 << order);
143}
144
Joonsoo Kim7cf91a92016-03-15 14:57:51 -0700145extern struct page *__pageblock_pfn_to_page(unsigned long start_pfn,
146 unsigned long end_pfn, struct zone *zone);
147
148static inline struct page *pageblock_pfn_to_page(unsigned long start_pfn,
149 unsigned long end_pfn, struct zone *zone)
150{
151 if (zone->contiguous)
152 return pfn_to_page(start_pfn);
153
154 return __pageblock_pfn_to_page(start_pfn, end_pfn, zone);
155}
156
Joonsoo Kim3c605092014-11-13 15:19:21 -0800157extern int __isolate_free_page(struct page *page, unsigned int order);
Mel Gormand70ddd72015-06-30 14:56:52 -0700158extern void __free_pages_bootmem(struct page *page, unsigned long pfn,
159 unsigned int order);
Kirill A. Shutemovd00181b2015-11-06 16:29:57 -0800160extern void prep_compound_page(struct page *page, unsigned int order);
Joonsoo Kim46f24fd2016-07-26 15:23:58 -0700161extern void post_alloc_hook(struct page *page, unsigned int order,
162 gfp_t gfp_flags);
Han Pingtian42aa83c2014-01-23 15:53:28 -0800163extern int user_min_free_kbytes;
Wu Fengguang20a03072009-06-16 15:32:22 -0700164
Michal Nazarewiczff9543f2011-12-29 13:09:50 +0100165#if defined CONFIG_COMPACTION || defined CONFIG_CMA
166
167/*
168 * in mm/compaction.c
169 */
170/*
171 * compact_control is used to track pages being migrated and the free pages
172 * they are being migrated to during memory compaction. The free_pfn starts
173 * at the end of a zone and migrate_pfn begins at the start. Movable pages
174 * are moved to the end of a zone during a compaction run and the run
175 * completes when free_pfn <= migrate_pfn
176 */
177struct compact_control {
178 struct list_head freepages; /* List of free pages to migrate to */
179 struct list_head migratepages; /* List of pages being migrated */
180 unsigned long nr_freepages; /* Number of isolated free pages */
181 unsigned long nr_migratepages; /* Number of pages to migrate */
182 unsigned long free_pfn; /* isolate_freepages search base */
183 unsigned long migrate_pfn; /* isolate_migratepages search base */
Joonsoo Kim1a167182015-09-08 15:03:59 -0700184 unsigned long last_migrated_pfn;/* Not yet flushed page being freed */
David Rientjese0b9dae2014-06-04 16:08:28 -0700185 enum migrate_mode mode; /* Async or sync migration mode */
Mel Gormanbb13ffe2012-10-08 16:32:41 -0700186 bool ignore_skip_hint; /* Scan blocks even if marked skip */
Vlastimil Babka9f7e3382016-10-07 17:00:37 -0700187 bool ignore_block_suitable; /* Scan blocks considered unsuitable */
Vlastimil Babkaaccf6242016-03-17 14:18:15 -0700188 bool direct_compaction; /* False from kcompactd or /proc/... */
Vlastimil Babka06ed2992016-10-07 16:57:35 -0700189 bool whole_zone; /* Whole zone should/has been scanned */
Michal Nazarewiczff9543f2011-12-29 13:09:50 +0100190 int order; /* order a direct compactor needs */
David Rientjes6d7ce552014-10-09 15:27:27 -0700191 const gfp_t gfp_mask; /* gfp mask of a direct compactor */
Mel Gormanc6038442016-05-19 17:13:38 -0700192 const unsigned int alloc_flags; /* alloc flags of a direct compactor */
Vlastimil Babkaebff3982014-12-10 15:43:22 -0800193 const int classzone_idx; /* zone index of a direct compactor */
Michal Nazarewiczff9543f2011-12-29 13:09:50 +0100194 struct zone *zone;
Vlastimil Babkac3486f52016-07-28 15:49:30 -0700195 bool contended; /* Signal lock or sched contention */
Michal Nazarewiczff9543f2011-12-29 13:09:50 +0100196};
197
198unsigned long
Mel Gormanbb13ffe2012-10-08 16:32:41 -0700199isolate_freepages_range(struct compact_control *cc,
200 unsigned long start_pfn, unsigned long end_pfn);
Michal Nazarewiczff9543f2011-12-29 13:09:50 +0100201unsigned long
Vlastimil Babkaedc2ca62014-10-09 15:27:09 -0700202isolate_migratepages_range(struct compact_control *cc,
203 unsigned long low_pfn, unsigned long end_pfn);
Joonsoo Kim2149cda2015-04-14 15:45:21 -0700204int find_suitable_fallback(struct free_area *area, unsigned int order,
205 int migratetype, bool only_stealable, bool *can_steal);
Michal Nazarewiczff9543f2011-12-29 13:09:50 +0100206
207#endif
Nick Piggin0f8053a2006-03-22 00:08:33 -0800208
Mel Gorman48f13bf2007-10-16 01:26:10 -0700209/*
Mel Gorman6c144662014-01-23 15:53:38 -0800210 * This function returns the order of a free page in the buddy system. In
211 * general, page_zone(page)->lock must be held by the caller to prevent the
212 * page from being allocated in parallel and returning garbage as the order.
213 * If a caller does not hold page_zone(page)->lock, it must guarantee that the
Vlastimil Babka99c0fd52014-10-09 15:27:23 -0700214 * page cannot be allocated or merged in parallel. Alternatively, it must
215 * handle invalid values gracefully, and use page_order_unsafe() below.
Mel Gorman48f13bf2007-10-16 01:26:10 -0700216 */
Kirill A. Shutemovd00181b2015-11-06 16:29:57 -0800217static inline unsigned int page_order(struct page *page)
Mel Gorman48f13bf2007-10-16 01:26:10 -0700218{
KAMEZAWA Hiroyuki572438f2010-10-26 14:22:08 -0700219 /* PageBuddy() must be checked by the caller */
Mel Gorman48f13bf2007-10-16 01:26:10 -0700220 return page_private(page);
221}
Alexander van Heukelumb5a0e012008-02-23 15:24:06 -0800222
Vlastimil Babka99c0fd52014-10-09 15:27:23 -0700223/*
224 * Like page_order(), but for callers who cannot afford to hold the zone lock.
225 * PageBuddy() should be checked first by the caller to minimize race window,
226 * and invalid values must be handled gracefully.
227 *
Jason Low4db0c3c2015-04-15 16:14:08 -0700228 * READ_ONCE is used so that if the caller assigns the result into a local
Vlastimil Babka99c0fd52014-10-09 15:27:23 -0700229 * variable and e.g. tests it for valid range before using, the compiler cannot
230 * decide to remove the variable and inline the page_private(page) multiple
231 * times, potentially observing different values in the tests and the actual
232 * use of the result.
233 */
Jason Low4db0c3c2015-04-15 16:14:08 -0700234#define page_order_unsafe(page) READ_ONCE(page_private(page))
Vlastimil Babka99c0fd52014-10-09 15:27:23 -0700235
Kirill A. Shutemov4bbd4c72014-06-04 16:08:10 -0700236static inline bool is_cow_mapping(vm_flags_t flags)
237{
238 return (flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE;
239}
240
Konstantin Khlebnikov30bdbb72016-02-02 16:57:46 -0800241/*
242 * These three helpers classifies VMAs for virtual memory accounting.
243 */
244
245/*
246 * Executable code area - executable, not writable, not stack
247 */
Konstantin Khlebnikovd977d562016-02-02 16:57:43 -0800248static inline bool is_exec_mapping(vm_flags_t flags)
249{
Konstantin Khlebnikov30bdbb72016-02-02 16:57:46 -0800250 return (flags & (VM_EXEC | VM_WRITE | VM_STACK)) == VM_EXEC;
Konstantin Khlebnikovd977d562016-02-02 16:57:43 -0800251}
252
Konstantin Khlebnikov30bdbb72016-02-02 16:57:46 -0800253/*
254 * Stack area - atomatically grows in one direction
255 *
256 * VM_GROWSUP / VM_GROWSDOWN VMAs are always private anonymous:
257 * do_mmap() forbids all other combinations.
258 */
Konstantin Khlebnikovd977d562016-02-02 16:57:43 -0800259static inline bool is_stack_mapping(vm_flags_t flags)
260{
Konstantin Khlebnikov30bdbb72016-02-02 16:57:46 -0800261 return (flags & VM_STACK) == VM_STACK;
Konstantin Khlebnikovd977d562016-02-02 16:57:43 -0800262}
263
Konstantin Khlebnikov30bdbb72016-02-02 16:57:46 -0800264/*
265 * Data area - private, writable, not stack
266 */
Konstantin Khlebnikovd977d562016-02-02 16:57:43 -0800267static inline bool is_data_mapping(vm_flags_t flags)
268{
Konstantin Khlebnikov30bdbb72016-02-02 16:57:46 -0800269 return (flags & (VM_WRITE | VM_SHARED | VM_STACK)) == VM_WRITE;
Konstantin Khlebnikovd977d562016-02-02 16:57:43 -0800270}
271
Namhyung Kim6038def2011-05-24 17:11:22 -0700272/* mm/util.c */
273void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
274 struct vm_area_struct *prev, struct rb_node *rb_parent);
275
Hugh Dickinsaf8e3352009-12-14 17:58:59 -0800276#ifdef CONFIG_MMU
Kirill A. Shutemovfc05f562015-04-14 15:44:39 -0700277extern long populate_vma_page_range(struct vm_area_struct *vma,
Michel Lespinassecea10a12013-02-22 16:32:44 -0800278 unsigned long start, unsigned long end, int *nonblocking);
Hugh Dickinsaf8e3352009-12-14 17:58:59 -0800279extern void munlock_vma_pages_range(struct vm_area_struct *vma,
280 unsigned long start, unsigned long end);
281static inline void munlock_vma_pages_all(struct vm_area_struct *vma)
282{
283 munlock_vma_pages_range(vma, vma->vm_start, vma->vm_end);
284}
285
Nick Pigginb291f002008-10-18 20:26:44 -0700286/*
Hugh Dickins73848b42009-12-14 17:59:22 -0800287 * must be called with vma's mmap_sem held for read or write, and page locked.
Nick Pigginb291f002008-10-18 20:26:44 -0700288 */
289extern void mlock_vma_page(struct page *page);
Michel Lespinasseff6a6da2013-02-27 17:02:44 -0800290extern unsigned int munlock_vma_page(struct page *page);
Nick Pigginb291f002008-10-18 20:26:44 -0700291
292/*
293 * Clear the page's PageMlocked(). This can be useful in a situation where
294 * we want to unconditionally remove a page from the pagecache -- e.g.,
295 * on truncation or freeing.
296 *
297 * It is legal to call this function for any page, mlocked or not.
298 * If called for a page that is still mapped by mlocked vmas, all we do
299 * is revert to lazy LRU behaviour -- semantics are not broken.
300 */
Hugh Dickinse6c509f2012-10-08 16:33:19 -0700301extern void clear_page_mlock(struct page *page);
Nick Pigginb291f002008-10-18 20:26:44 -0700302
303/*
Hugh Dickins51afb122015-11-05 18:49:37 -0800304 * mlock_migrate_page - called only from migrate_misplaced_transhuge_page()
305 * (because that does not go through the full procedure of migration ptes):
306 * to migrate the Mlocked page flag; update statistics.
Nick Pigginb291f002008-10-18 20:26:44 -0700307 */
308static inline void mlock_migrate_page(struct page *newpage, struct page *page)
309{
Nick Piggin5344b7e2008-10-18 20:26:51 -0700310 if (TestClearPageMlocked(page)) {
Mel Gormanb32967f2012-11-19 12:35:47 +0000311 int nr_pages = hpage_nr_pages(page);
Nick Piggin5344b7e2008-10-18 20:26:51 -0700312
Hugh Dickins51afb122015-11-05 18:49:37 -0800313 /* Holding pmd lock, no change in irq context: __mod is safe */
Mel Gormanb32967f2012-11-19 12:35:47 +0000314 __mod_zone_page_state(page_zone(page), NR_MLOCK, -nr_pages);
Nick Pigginb291f002008-10-18 20:26:44 -0700315 SetPageMlocked(newpage);
Mel Gormanb32967f2012-11-19 12:35:47 +0000316 __mod_zone_page_state(page_zone(newpage), NR_MLOCK, nr_pages);
Nick Piggin5344b7e2008-10-18 20:26:51 -0700317 }
Nick Pigginb291f002008-10-18 20:26:44 -0700318}
319
Mel Gormanb32967f2012-11-19 12:35:47 +0000320extern pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma);
321
Kirill A. Shutemove9b61f12016-01-15 16:54:10 -0800322/*
323 * At what user virtual address is page expected in @vma?
324 */
325static inline unsigned long
326__vma_address(struct page *page, struct vm_area_struct *vma)
327{
328 pgoff_t pgoff = page_to_pgoff(page);
329 return vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT);
330}
331
332static inline unsigned long
333vma_address(struct page *page, struct vm_area_struct *vma)
334{
335 unsigned long address = __vma_address(page, vma);
336
337 /* page should be within @vma mapping range */
338 VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma);
339
340 return address;
341}
342
Hugh Dickinsaf8e3352009-12-14 17:58:59 -0800343#else /* !CONFIG_MMU */
Nick Pigginb291f002008-10-18 20:26:44 -0700344static inline void clear_page_mlock(struct page *page) { }
345static inline void mlock_vma_page(struct page *page) { }
346static inline void mlock_migrate_page(struct page *new, struct page *old) { }
347
Hugh Dickinsaf8e3352009-12-14 17:58:59 -0800348#endif /* !CONFIG_MMU */
Lee Schermerhorn894bc312008-10-18 20:26:39 -0700349
Alexander van Heukelumb5a0e012008-02-23 15:24:06 -0800350/*
Andy Whitcroft69d177c2008-11-06 12:53:26 -0800351 * Return the mem_map entry representing the 'offset' subpage within
352 * the maximally aligned gigantic page 'base'. Handle any discontiguity
353 * in the mem_map at MAX_ORDER_NR_PAGES boundaries.
354 */
355static inline struct page *mem_map_offset(struct page *base, int offset)
356{
357 if (unlikely(offset >= MAX_ORDER_NR_PAGES))
Fabian Frederickbc7f84c2014-08-06 16:05:17 -0700358 return nth_page(base, offset);
Andy Whitcroft69d177c2008-11-06 12:53:26 -0800359 return base + offset;
360}
361
362/*
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300363 * Iterator over all subpages within the maximally aligned gigantic
Andy Whitcroft69d177c2008-11-06 12:53:26 -0800364 * page 'base'. Handle any discontiguity in the mem_map.
365 */
366static inline struct page *mem_map_next(struct page *iter,
367 struct page *base, int offset)
368{
369 if (unlikely((offset & (MAX_ORDER_NR_PAGES - 1)) == 0)) {
370 unsigned long pfn = page_to_pfn(base) + offset;
371 if (!pfn_valid(pfn))
372 return NULL;
373 return pfn_to_page(pfn);
374 }
375 return iter + 1;
376}
377
378/*
Alexander van Heukelumb5a0e012008-02-23 15:24:06 -0800379 * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node,
380 * so all functions starting at paging_init should be marked __init
381 * in those cases. SPARSEMEM, however, allows for memory hotplug,
382 * and alloc_bootmem_node is not used.
383 */
384#ifdef CONFIG_SPARSEMEM
385#define __paginginit __meminit
386#else
387#define __paginginit __init
388#endif
389
Mel Gorman6b74ab92008-07-23 21:26:49 -0700390/* Memory initialisation debug and verification */
391enum mminit_level {
392 MMINIT_WARNING,
393 MMINIT_VERIFY,
394 MMINIT_TRACE
395};
396
397#ifdef CONFIG_DEBUG_MEMORY_INIT
398
399extern int mminit_loglevel;
400
401#define mminit_dprintk(level, prefix, fmt, arg...) \
402do { \
403 if (level < mminit_loglevel) { \
Rasmus Villemoesfc5199d2015-02-12 15:00:02 -0800404 if (level <= MMINIT_WARNING) \
Joe Perches11705322016-03-17 14:19:50 -0700405 pr_warn("mminit::" prefix " " fmt, ##arg); \
Rasmus Villemoesfc5199d2015-02-12 15:00:02 -0800406 else \
407 printk(KERN_DEBUG "mminit::" prefix " " fmt, ##arg); \
Mel Gorman6b74ab92008-07-23 21:26:49 -0700408 } \
409} while (0)
410
Mel Gorman708614e2008-07-23 21:26:51 -0700411extern void mminit_verify_pageflags_layout(void);
Mel Gorman68ad8df2008-07-23 21:26:52 -0700412extern void mminit_verify_zonelist(void);
Mel Gorman6b74ab92008-07-23 21:26:49 -0700413#else
414
415static inline void mminit_dprintk(enum mminit_level level,
416 const char *prefix, const char *fmt, ...)
417{
418}
419
Mel Gorman708614e2008-07-23 21:26:51 -0700420static inline void mminit_verify_pageflags_layout(void)
421{
422}
423
Mel Gorman68ad8df2008-07-23 21:26:52 -0700424static inline void mminit_verify_zonelist(void)
425{
426}
Mel Gorman6b74ab92008-07-23 21:26:49 -0700427#endif /* CONFIG_DEBUG_MEMORY_INIT */
Mel Gorman2dbb51c2008-07-23 21:26:52 -0700428
429/* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */
430#if defined(CONFIG_SPARSEMEM)
431extern void mminit_validate_memmodel_limits(unsigned long *start_pfn,
432 unsigned long *end_pfn);
433#else
434static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn,
435 unsigned long *end_pfn)
436{
437}
438#endif /* CONFIG_SPARSEMEM */
439
Mel Gormana5f5f912016-07-28 15:46:32 -0700440#define NODE_RECLAIM_NOSCAN -2
441#define NODE_RECLAIM_FULL -1
442#define NODE_RECLAIM_SOME 0
443#define NODE_RECLAIM_SUCCESS 1
Wu Fengguang7c116f22009-12-16 12:19:59 +0100444
Wei Yangaf7fee12018-12-28 00:34:36 -0800445#ifdef CONFIG_NUMA
446extern int node_reclaim(struct pglist_data *, gfp_t, unsigned int);
447#else
448static inline int node_reclaim(struct pglist_data *pgdat, gfp_t mask,
449 unsigned int order)
450{
451 return NODE_RECLAIM_NOSCAN;
452}
453#endif
454
Wu Fengguang31d3d342009-12-16 12:19:59 +0100455extern int hwpoison_filter(struct page *p);
456
Wu Fengguang7c116f22009-12-16 12:19:59 +0100457extern u32 hwpoison_filter_dev_major;
458extern u32 hwpoison_filter_dev_minor;
Wu Fengguang478c5ff2009-12-16 12:19:59 +0100459extern u64 hwpoison_filter_flags_mask;
460extern u64 hwpoison_filter_flags_value;
Andi Kleen4fd466e2009-12-16 12:19:59 +0100461extern u64 hwpoison_filter_memcg;
Haicheng Li1bfe5fe2009-12-16 12:19:59 +0100462extern u32 hwpoison_filter_enable;
Al Viroeb36c582012-05-30 20:17:35 -0400463
Michal Hockodc0ef0d2016-05-23 16:25:27 -0700464extern unsigned long __must_check vm_mmap_pgoff(struct file *, unsigned long,
Al Viroeb36c582012-05-30 20:17:35 -0400465 unsigned long, unsigned long,
Michal Hocko9fbeb5a2016-05-23 16:25:30 -0700466 unsigned long, unsigned long);
Xishi Qiuca57df72012-07-31 16:43:19 -0700467
468extern void set_pageblock_order(void);
Minchan Kim02c6de82012-10-08 16:31:55 -0700469unsigned long reclaim_clean_pages_from_list(struct zone *zone,
470 struct list_head *page_list);
Bartlomiej Zolnierkiewiczd95ea5d2012-10-08 16:32:05 -0700471/* The ALLOC_WMARK bits are used as an index to zone->watermark */
472#define ALLOC_WMARK_MIN WMARK_MIN
473#define ALLOC_WMARK_LOW WMARK_LOW
474#define ALLOC_WMARK_HIGH WMARK_HIGH
475#define ALLOC_NO_WATERMARKS 0x04 /* don't check watermarks at all */
476
477/* Mask to get the watermark bits */
478#define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1)
479
480#define ALLOC_HARDER 0x10 /* try to alloc harder */
481#define ALLOC_HIGH 0x20 /* __GFP_HIGH set */
482#define ALLOC_CPUSET 0x40 /* check for correct cpuset */
483#define ALLOC_CMA 0x80 /* allow allocations from CMA areas */
484
Mel Gorman72b252a2015-09-04 15:47:32 -0700485enum ttu_flags;
486struct tlbflush_unmap_batch;
487
488#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
489void try_to_unmap_flush(void);
Mel Gormand950c942015-09-04 15:47:35 -0700490void try_to_unmap_flush_dirty(void);
Mel Gorman5a1eef72017-08-02 13:31:52 -0700491void flush_tlb_batched_pending(struct mm_struct *mm);
Mel Gorman72b252a2015-09-04 15:47:32 -0700492#else
493static inline void try_to_unmap_flush(void)
494{
495}
Mel Gormand950c942015-09-04 15:47:35 -0700496static inline void try_to_unmap_flush_dirty(void)
497{
498}
Mel Gorman5a1eef72017-08-02 13:31:52 -0700499static inline void flush_tlb_batched_pending(struct mm_struct *mm)
500{
501}
Mel Gorman72b252a2015-09-04 15:47:32 -0700502#endif /* CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH */
Vlastimil Babkaedf14cd2016-03-15 14:55:56 -0700503
504extern const struct trace_print_flags pageflag_names[];
505extern const struct trace_print_flags vmaflag_names[];
506extern const struct trace_print_flags gfpflag_names[];
507
Michel Lespinassedb971412012-10-08 16:29:34 -0700508#endif /* __MM_INTERNAL_H */