diff options
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 164 |
1 files changed, 106 insertions, 58 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 3ef2050ba..3ce30ef53 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -22,6 +22,7 @@ #include <linux/resource.h> #include <linux/page_ext.h> #include <linux/err.h> +#include <linux/page_ref.h> struct mempolicy; struct anon_vma; @@ -82,6 +83,27 @@ extern int mmap_rnd_compat_bits __read_mostly; #define mm_forbids_zeropage(X) (0) #endif +/* + * Default maximum number of active map areas, this limits the number of vmas + * per mm struct. Users can overwrite this number by sysctl but there is a + * problem. + * + * When a program's coredump is generated as ELF format, a section is created + * per a vma. In ELF, the number of sections is represented in unsigned short. + * This means the number of sections should be smaller than 65535 at coredump. + * Because the kernel adds some informative sections to a image of program at + * generating coredump, we need some margin. The number of extra sections is + * 1-3 now and depends on arch. We use "5" as safe margin, here. + * + * ELF extended numbering allows more than 65535 sections, so 16-bit bound is + * not a hard limit any more. Although some userspace tools can be surprised by + * that. + */ +#define MAPCOUNT_ELF_CORE_MARGIN (5) +#define DEFAULT_MAX_MAP_COUNT (USHRT_MAX - MAPCOUNT_ELF_CORE_MARGIN) + +extern int sysctl_max_map_count; + extern unsigned long sysctl_user_reserve_kbytes; extern unsigned long sysctl_admin_reserve_kbytes; @@ -122,6 +144,7 @@ extern unsigned int kobjsize(const void *objp); /* * vm_flags in vm_area_struct, see mm_types.h. + * When changing, update also include/trace/events/mmflags.h */ #define VM_NONE 0x00000000 @@ -170,8 +193,26 @@ extern unsigned int kobjsize(const void *objp); #define VM_NOHUGEPAGE 0x40000000 /* MADV_NOHUGEPAGE marked this vma */ #define VM_MERGEABLE 0x80000000 /* KSM may merge identical pages */ +#ifdef CONFIG_ARCH_USES_HIGH_VMA_FLAGS +#define VM_HIGH_ARCH_BIT_0 32 /* bit only usable on 64-bit architectures */ +#define VM_HIGH_ARCH_BIT_1 33 /* bit only usable on 64-bit architectures */ +#define VM_HIGH_ARCH_BIT_2 34 /* bit only usable on 64-bit architectures */ +#define VM_HIGH_ARCH_BIT_3 35 /* bit only usable on 64-bit architectures */ +#define VM_HIGH_ARCH_0 BIT(VM_HIGH_ARCH_BIT_0) +#define VM_HIGH_ARCH_1 BIT(VM_HIGH_ARCH_BIT_1) +#define VM_HIGH_ARCH_2 BIT(VM_HIGH_ARCH_BIT_2) +#define VM_HIGH_ARCH_3 BIT(VM_HIGH_ARCH_BIT_3) +#endif /* CONFIG_ARCH_USES_HIGH_VMA_FLAGS */ + #if defined(CONFIG_X86) # define VM_PAT VM_ARCH_1 /* PAT reserves whole VMA at once (x86) */ +#if defined (CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS) +# define VM_PKEY_SHIFT VM_HIGH_ARCH_BIT_0 +# define VM_PKEY_BIT0 VM_HIGH_ARCH_0 /* A protection key is a 4-bit value */ +# define VM_PKEY_BIT1 VM_HIGH_ARCH_1 +# define VM_PKEY_BIT2 VM_HIGH_ARCH_2 +# define VM_PKEY_BIT3 VM_HIGH_ARCH_3 +#endif #elif defined(CONFIG_PPC) # define VM_SAO VM_ARCH_1 /* Strong Access Ordering (powerpc) */ #elif defined(CONFIG_PARISC) @@ -233,6 +274,8 @@ extern pgprot_t protection_map[16]; #define FAULT_FLAG_KILLABLE 0x10 /* The fault task is in SIGKILL killable region */ #define FAULT_FLAG_TRIED 0x20 /* Second try */ #define FAULT_FLAG_USER 0x40 /* The fault originated in userspace */ +#define FAULT_FLAG_REMOTE 0x80 /* faulting for non current tsk/mm */ +#define FAULT_FLAG_INSTRUCTION 0x100 /* The fault was during an instruction fetch */ /* * vm_fault is filled by the the pagefault handler and passed to the vma's @@ -364,8 +407,8 @@ static inline int pmd_devmap(pmd_t pmd) */ static inline int put_page_testzero(struct page *page) { - VM_BUG_ON_PAGE(atomic_read(&page->_count) == 0, page); - return atomic_dec_and_test(&page->_count); + VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); + return page_ref_dec_and_test(page); } /* @@ -376,7 +419,7 @@ static inline int put_page_testzero(struct page *page) */ static inline int get_page_unless_zero(struct page *page) { - return atomic_inc_not_zero(&page->_count); + return page_ref_add_unless(page, 1, 0); } extern int page_is_ram(unsigned long pfn); @@ -387,7 +430,8 @@ enum { REGION_MIXED, }; -int region_intersects(resource_size_t offset, size_t size, const char *type); +int region_intersects(resource_size_t offset, size_t size, unsigned long flags, + unsigned long desc); /* Support for virtually mapped pages */ struct page *vmalloc_to_page(const void *addr); @@ -456,17 +500,21 @@ static inline int page_mapcount(struct page *page) #ifdef CONFIG_TRANSPARENT_HUGEPAGE int total_mapcount(struct page *page); +int page_trans_huge_mapcount(struct page *page, int *total_mapcount); #else static inline int total_mapcount(struct page *page) { return page_mapcount(page); } -#endif - -static inline int page_count(struct page *page) +static inline int page_trans_huge_mapcount(struct page *page, + int *total_mapcount) { - return atomic_read(&compound_head(page)->_count); + int mapcount = page_mapcount(page); + if (total_mapcount) + *total_mapcount = mapcount; + return mapcount; } +#endif static inline struct page *virt_to_head_page(const void *x) { @@ -475,15 +523,6 @@ static inline struct page *virt_to_head_page(const void *x) return compound_head(page); } -/* - * Setup the page count before being freed into the page allocator for - * the first time (boot or memory hotplug) - */ -static inline void init_page_count(struct page *page) -{ - atomic_set(&page->_count, 1); -} - void __put_page(struct page *page); void put_pages_list(struct list_head *pages); @@ -593,7 +632,7 @@ void do_set_pte(struct vm_area_struct *vma, unsigned long address, * * A page may belong to an inode's memory mapping. In this case, page->mapping * is the pointer to the inode, and page->index is the file offset of the page, - * in units of PAGE_CACHE_SIZE. + * in units of PAGE_SIZE. * * If pagecache pages are not associated with an inode, they are said to be * anonymous pages. These may become associated with the swapcache, and in that @@ -693,8 +732,8 @@ static inline void get_page(struct page *page) * Getting a normal page or the head of a compound page * requires to already have an elevated page->_count. */ - VM_BUG_ON_PAGE(atomic_read(&page->_count) <= 0, page); - atomic_inc(&page->_count); + VM_BUG_ON_PAGE(page_ref_count(page) <= 0, page); + page_ref_inc(page); if (unlikely(is_zone_device_page(page))) get_zone_device_page(page); @@ -904,20 +943,11 @@ static inline struct mem_cgroup *page_memcg(struct page *page) { return page->mem_cgroup; } - -static inline void set_page_memcg(struct page *page, struct mem_cgroup *memcg) -{ - page->mem_cgroup = memcg; -} #else static inline struct mem_cgroup *page_memcg(struct page *page) { return NULL; } - -static inline void set_page_memcg(struct page *page, struct mem_cgroup *memcg) -{ -} #endif /* @@ -1053,8 +1083,6 @@ static inline void clear_page_pfmemalloc(struct page *page) * just gets major/minor fault counters bumped up. */ -#define VM_FAULT_MINOR 0 /* For backwards compat. Remove me quickly. */ - #define VM_FAULT_OOM 0x0001 #define VM_FAULT_SIGBUS 0x0002 #define VM_FAULT_MAJOR 0x0004 @@ -1115,6 +1143,8 @@ struct zap_details { struct address_space *check_mapping; /* Check page->mapping if set */ pgoff_t first_index; /* Lowest page->index to unmap */ pgoff_t last_index; /* Highest page->index to unmap */ + bool ignore_dirty; /* Ignore dirty pages */ + bool check_swap_entries; /* Check also swap entries */ }; struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr, @@ -1251,20 +1281,20 @@ long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm, unsigned long start, unsigned long nr_pages, unsigned int foll_flags, struct page **pages, struct vm_area_struct **vmas, int *nonblocking); -long get_user_pages(struct task_struct *tsk, struct mm_struct *mm, - unsigned long start, unsigned long nr_pages, - int write, int force, struct page **pages, - struct vm_area_struct **vmas); -long get_user_pages_locked(struct task_struct *tsk, struct mm_struct *mm, - unsigned long start, unsigned long nr_pages, - int write, int force, struct page **pages, - int *locked); +long get_user_pages_remote(struct task_struct *tsk, struct mm_struct *mm, + unsigned long start, unsigned long nr_pages, + int write, int force, struct page **pages, + struct vm_area_struct **vmas); +long get_user_pages(unsigned long start, unsigned long nr_pages, + int write, int force, struct page **pages, + struct vm_area_struct **vmas); +long get_user_pages_locked(unsigned long start, unsigned long nr_pages, + int write, int force, struct page **pages, int *locked); long __get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm, unsigned long start, unsigned long nr_pages, int write, int force, struct page **pages, unsigned int gup_flags); -long get_user_pages_unlocked(struct task_struct *tsk, struct mm_struct *mm, - unsigned long start, unsigned long nr_pages, +long get_user_pages_unlocked(unsigned long start, unsigned long nr_pages, int write, int force, struct page **pages); int get_user_pages_fast(unsigned long start, int nr_pages, int write, struct page **pages); @@ -1325,10 +1355,9 @@ int __set_page_dirty_nobuffers(struct page *page); int __set_page_dirty_no_writeback(struct page *page); int redirty_page_for_writepage(struct writeback_control *wbc, struct page *page); -void account_page_dirtied(struct page *page, struct address_space *mapping, - struct mem_cgroup *memcg); +void account_page_dirtied(struct page *page, struct address_space *mapping); void account_page_cleaned(struct page *page, struct address_space *mapping, - struct mem_cgroup *memcg, struct bdi_writeback *wb); + struct bdi_writeback *wb); int set_page_dirty(struct page *page); int set_page_dirty_lock(struct page *page); void cancel_dirty_page(struct page *page); @@ -1558,8 +1587,7 @@ static inline void mm_dec_nr_pmds(struct mm_struct *mm) } #endif -int __pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma, - pmd_t *pmd, unsigned long address); +int __pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address); int __pte_alloc_kernel(pmd_t *pmd, unsigned long address); /* @@ -1685,15 +1713,15 @@ static inline void pgtable_page_dtor(struct page *page) pte_unmap(pte); \ } while (0) -#define pte_alloc_map(mm, vma, pmd, address) \ - ((unlikely(pmd_none(*(pmd))) && __pte_alloc(mm, vma, \ - pmd, address))? \ - NULL: pte_offset_map(pmd, address)) +#define pte_alloc(mm, pmd, address) \ + (unlikely(pmd_none(*(pmd))) && __pte_alloc(mm, pmd, address)) + +#define pte_alloc_map(mm, pmd, address) \ + (pte_alloc(mm, pmd, address) ? NULL : pte_offset_map(pmd, address)) #define pte_alloc_map_lock(mm, pmd, address, ptlp) \ - ((unlikely(pmd_none(*(pmd))) && __pte_alloc(mm, NULL, \ - pmd, address))? \ - NULL: pte_offset_map_lock(mm, pmd, address, ptlp)) + (pte_alloc(mm, pmd, address) ? \ + NULL : pte_offset_map_lock(mm, pmd, address, ptlp)) #define pte_alloc_kernel(pmd, address) \ ((unlikely(pmd_none(*(pmd))) && __pte_alloc_kernel(pmd, address))? \ @@ -1776,7 +1804,7 @@ extern void free_highmem_page(struct page *page); extern void adjust_managed_page_count(struct page *page, long count); extern void mem_init_print_info(const char *str); -extern void reserve_bootmem_region(unsigned long start, unsigned long end); +extern void reserve_bootmem_region(phys_addr_t start, phys_addr_t end); /* Free the reserved page into the buddy system, so it gets managed. */ static inline void __free_reserved_page(struct page *page) @@ -1888,6 +1916,7 @@ extern int __meminit init_per_zone_wmark_min(void); extern void mem_init(void); extern void __init mmap_init(void); extern void show_mem(unsigned int flags); +extern long si_mem_available(void); extern void si_meminfo(struct sysinfo * val); extern void si_meminfo_node(struct sysinfo *val, int nid); @@ -1902,6 +1931,7 @@ extern void zone_pcp_reset(struct zone *zone); /* page_alloc.c */ extern int min_free_kbytes; +extern int watermark_scale_factor; /* nommu.c */ extern atomic_long_t mmap_pages_allocated; @@ -2164,6 +2194,8 @@ int remap_pfn_range(struct vm_area_struct *, unsigned long addr, int vm_insert_page(struct vm_area_struct *, unsigned long addr, struct page *); int vm_insert_pfn(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn); +int vm_insert_pfn_prot(struct vm_area_struct *vma, unsigned long addr, + unsigned long pfn, pgprot_t pgprot); int vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr, pfn_t pfn); int vm_iomap_memory(struct vm_area_struct *vma, phys_addr_t start, unsigned long len); @@ -2194,6 +2226,7 @@ static inline struct page *follow_page(struct vm_area_struct *vma, #define FOLL_MIGRATION 0x400 /* wait for page to replace migration entry */ #define FOLL_TRIED 0x800 /* a retry, previous pass started an IO */ #define FOLL_MLOCK 0x1000 /* lock present pages */ +#define FOLL_REMOTE 0x2000 /* we are working on non-current tsk/mm */ typedef int (*pte_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr, void *data); @@ -2201,6 +2234,17 @@ extern int apply_to_page_range(struct mm_struct *mm, unsigned long address, unsigned long size, pte_fn_t fn, void *data); +#ifdef CONFIG_PAGE_POISONING +extern bool page_poisoning_enabled(void); +extern void kernel_poison_pages(struct page *page, int numpages, int enable); +extern bool page_is_poisoned(struct page *page); +#else +static inline bool page_poisoning_enabled(void) { return false; } +static inline void kernel_poison_pages(struct page *page, int numpages, + int enable) { } +static inline bool page_is_poisoned(struct page *page) { return false; } +#endif + #ifdef CONFIG_DEBUG_PAGEALLOC extern bool _debug_pagealloc_enabled; extern void __kernel_map_pages(struct page *page, int numpages, int enable); @@ -2220,14 +2264,18 @@ kernel_map_pages(struct page *page, int numpages, int enable) } #ifdef CONFIG_HIBERNATION extern bool kernel_page_present(struct page *page); -#endif /* CONFIG_HIBERNATION */ -#else +#endif /* CONFIG_HIBERNATION */ +#else /* CONFIG_DEBUG_PAGEALLOC */ static inline void kernel_map_pages(struct page *page, int numpages, int enable) {} #ifdef CONFIG_HIBERNATION static inline bool kernel_page_present(struct page *page) { return true; } -#endif /* CONFIG_HIBERNATION */ -#endif +#endif /* CONFIG_HIBERNATION */ +static inline bool debug_pagealloc_enabled(void) +{ + return false; +} +#endif /* CONFIG_DEBUG_PAGEALLOC */ #ifdef __HAVE_ARCH_GATE_AREA extern struct vm_area_struct *get_gate_vma(struct mm_struct *mm); |