diff options
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/mm/internal.h b/mm/internal.h index 2189af491783..2ba87fbfb75b 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -100,6 +100,39 @@ extern void prep_compound_page(struct page *page, unsigned long order); extern bool is_free_buddy_page(struct page *page); #endif +#if defined CONFIG_COMPACTION || defined CONFIG_CMA + +/* + * in mm/compaction.c + */ +/* + * compact_control is used to track pages being migrated and the free pages + * they are being migrated to during memory compaction. The free_pfn starts + * at the end of a zone and migrate_pfn begins at the start. Movable pages + * are moved to the end of a zone during a compaction run and the run + * completes when free_pfn <= migrate_pfn + */ +struct compact_control { + struct list_head freepages; /* List of free pages to migrate to */ + struct list_head migratepages; /* List of pages being migrated */ + unsigned long nr_freepages; /* Number of isolated free pages */ + unsigned long nr_migratepages; /* Number of pages to migrate */ + unsigned long free_pfn; /* isolate_freepages search base */ + unsigned long migrate_pfn; /* isolate_migratepages search base */ + bool sync; /* Synchronous migration */ + + int order; /* order a direct compactor needs */ + int migratetype; /* MOVABLE, RECLAIMABLE etc */ + struct zone *zone; +}; + +unsigned long +isolate_freepages_range(unsigned long start_pfn, unsigned long end_pfn); +unsigned long +isolate_migratepages_range(struct zone *zone, struct compact_control *cc, + unsigned long low_pfn, unsigned long end_pfn); + +#endif /* * function for dealing with page's order in buddy system. @@ -131,7 +164,8 @@ static inline void munlock_vma_pages_all(struct vm_area_struct *vma) * to determine if it's being mapped into a LOCKED vma. * If so, mark page as mlocked. */ -static inline int is_mlocked_vma(struct vm_area_struct *vma, struct page *page) +static inline int mlocked_vma_newpage(struct vm_area_struct *vma, + struct page *page) { VM_BUG_ON(PageLRU(page)); @@ -189,7 +223,7 @@ extern unsigned long vma_address(struct page *page, struct vm_area_struct *vma); #endif #else /* !CONFIG_MMU */ -static inline int is_mlocked_vma(struct vm_area_struct *v, struct page *p) +static inline int mlocked_vma_newpage(struct vm_area_struct *v, struct page *p) { return 0; } @@ -309,3 +343,7 @@ extern u64 hwpoison_filter_flags_mask; extern u64 hwpoison_filter_flags_value; extern u64 hwpoison_filter_memcg; extern u32 hwpoison_filter_enable; + +extern unsigned long vm_mmap_pgoff(struct file *, unsigned long, + unsigned long, unsigned long, + unsigned long, unsigned long); |