diff options
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 73 |
1 files changed, 54 insertions, 19 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index b695875d63e..c31a9cd2a30 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -107,6 +107,7 @@ extern unsigned int kobjsize(const void *objp); #define VM_ALWAYSDUMP 0x04000000 /* Always include in core dumps */ #define VM_CAN_NONLINEAR 0x08000000 /* Has ->fault & does nonlinear pages */ +#define VM_MIXEDMAP 0x10000000 /* Can contain "struct page" and pure PFN pages */ #ifndef VM_STACK_DEFAULT_FLAGS /* arch can override this */ #define VM_STACK_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS @@ -164,8 +165,6 @@ struct vm_operations_struct { void (*open)(struct vm_area_struct * area); void (*close)(struct vm_area_struct * area); int (*fault)(struct vm_area_struct *vma, struct vm_fault *vmf); - struct page *(*nopage)(struct vm_area_struct *area, - unsigned long address, int *type); unsigned long (*nopfn)(struct vm_area_struct *area, unsigned long address); @@ -173,7 +172,25 @@ struct vm_operations_struct { * writable, if an error is returned it will cause a SIGBUS */ int (*page_mkwrite)(struct vm_area_struct *vma, struct page *page); #ifdef CONFIG_NUMA + /* + * set_policy() op must add a reference to any non-NULL @new mempolicy + * to hold the policy upon return. Caller should pass NULL @new to + * remove a policy and fall back to surrounding context--i.e. do not + * install a MPOL_DEFAULT policy, nor the task or system default + * mempolicy. + */ int (*set_policy)(struct vm_area_struct *vma, struct mempolicy *new); + + /* + * get_policy() op must add reference [mpol_get()] to any policy at + * (vma,addr) marked as MPOL_SHARED. The shared policy infrastructure + * in mm/mempolicy.c will do this automatically. + * get_policy() must NOT add a ref if the policy at (vma,addr) is not + * marked as MPOL_SHARED. vma policies are protected by the mmap_sem. + * If no [shared/vma] mempolicy exists at the addr, get_policy() op + * must return NULL--i.e., do not "fallback" to task or system default + * policy. + */ struct mempolicy *(*get_policy)(struct vm_area_struct *vma, unsigned long addr); int (*migrate)(struct vm_area_struct *vma, const nodemask_t *from, @@ -397,11 +414,11 @@ static inline void set_compound_order(struct page *page, unsigned long order) * we have run out of space and have to fall back to an * alternate (slower) way of determining the node. * - * No sparsemem: | NODE | ZONE | ... | FLAGS | - * with space for node: | SECTION | NODE | ZONE | ... | FLAGS | - * no space for node: | SECTION | ZONE | ... | FLAGS | + * No sparsemem or sparsemem vmemmap: | NODE | ZONE | ... | FLAGS | + * classic sparse with space for node:| SECTION | NODE | ZONE | ... | FLAGS | + * classic sparse no space for node: | SECTION | ZONE | ... | FLAGS | */ -#ifdef CONFIG_SPARSEMEM +#if defined(CONFIG_SPARSEMEM) && !defined(CONFIG_SPARSEMEM_VMEMMAP) #define SECTIONS_WIDTH SECTIONS_SHIFT #else #define SECTIONS_WIDTH 0 @@ -409,9 +426,12 @@ static inline void set_compound_order(struct page *page, unsigned long order) #define ZONES_WIDTH ZONES_SHIFT -#if SECTIONS_WIDTH+ZONES_WIDTH+NODES_SHIFT <= FLAGS_RESERVED +#if SECTIONS_WIDTH+ZONES_WIDTH+NODES_SHIFT <= BITS_PER_LONG - NR_PAGEFLAGS #define NODES_WIDTH NODES_SHIFT #else +#ifdef CONFIG_SPARSEMEM_VMEMMAP +#error "Vmemmap: No space for nodes field in page flags" +#endif #define NODES_WIDTH 0 #endif @@ -454,8 +474,8 @@ static inline void set_compound_order(struct page *page, unsigned long order) #define ZONEID_PGSHIFT (ZONEID_PGOFF * (ZONEID_SHIFT != 0)) -#if SECTIONS_WIDTH+NODES_WIDTH+ZONES_WIDTH > FLAGS_RESERVED -#error SECTIONS_WIDTH+NODES_WIDTH+ZONES_WIDTH > FLAGS_RESERVED +#if SECTIONS_WIDTH+NODES_WIDTH+ZONES_WIDTH > BITS_PER_LONG - NR_PAGEFLAGS +#error SECTIONS_WIDTH+NODES_WIDTH+ZONES_WIDTH > BITS_PER_LONG - NR_PAGEFLAGS #endif #define ZONES_MASK ((1UL << ZONES_WIDTH) - 1) @@ -504,10 +524,12 @@ static inline struct zone *page_zone(struct page *page) return &NODE_DATA(page_to_nid(page))->node_zones[page_zonenum(page)]; } +#if defined(CONFIG_SPARSEMEM) && !defined(CONFIG_SPARSEMEM_VMEMMAP) static inline unsigned long page_to_section(struct page *page) { return (page->flags >> SECTIONS_PGSHIFT) & SECTIONS_MASK; } +#endif static inline void set_page_zone(struct page *page, enum zone_type zone) { @@ -602,9 +624,12 @@ static inline struct address_space *page_mapping(struct page *page) struct address_space *mapping = page->mapping; VM_BUG_ON(PageSlab(page)); +#ifdef CONFIG_SWAP if (unlikely(PageSwapCache(page))) mapping = &swapper_space; - else if (unlikely((unsigned long)mapping & PAGE_MAPPING_ANON)) + else +#endif + if (unlikely((unsigned long)mapping & PAGE_MAPPING_ANON)) mapping = NULL; return mapping; } @@ -649,12 +674,6 @@ static inline int page_mapped(struct page *page) } /* - * Error return values for the *_nopage functions - */ -#define NOPAGE_SIGBUS (NULL) -#define NOPAGE_OOM ((struct page *) (-1)) - -/* * Error return values for the *_nopfn functions */ #define NOPFN_SIGBUS ((unsigned long) -1) @@ -720,7 +739,9 @@ struct zap_details { unsigned long truncate_count; /* Compare vm_truncate_count */ }; -struct page *vm_normal_page(struct vm_area_struct *, unsigned long, pte_t); +struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr, + pte_t pte); + unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address, unsigned long size, struct zap_details *); unsigned long unmap_vmas(struct mmu_gather **tlb, @@ -1045,6 +1066,19 @@ extern void unlink_file_vma(struct vm_area_struct *); extern struct vm_area_struct *copy_vma(struct vm_area_struct **, unsigned long addr, unsigned long len, pgoff_t pgoff); extern void exit_mmap(struct mm_struct *); + +#ifdef CONFIG_PROC_FS +/* From fs/proc/base.c. callers must _not_ hold the mm's exe_file_lock */ +extern void added_exe_file_vma(struct mm_struct *mm); +extern void removed_exe_file_vma(struct mm_struct *mm); +#else +static inline void added_exe_file_vma(struct mm_struct *mm) +{} + +static inline void removed_exe_file_vma(struct mm_struct *mm) +{} +#endif /* CONFIG_PROC_FS */ + extern int may_expand_vm(struct mm_struct *mm, unsigned long npages); extern int install_special_mapping(struct mm_struct *mm, unsigned long addr, unsigned long len, @@ -1149,6 +1183,8 @@ 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_mixed(struct vm_area_struct *vma, unsigned long addr, + unsigned long pfn); struct page *follow_page(struct vm_area_struct *, unsigned long address, unsigned int foll_flags); @@ -1207,8 +1243,6 @@ int drop_caches_sysctl_handler(struct ctl_table *, int, struct file *, void __user *, size_t *, loff_t *); unsigned long shrink_slab(unsigned long scanned, gfp_t gfp_mask, unsigned long lru_pages); -void drop_pagecache(void); -void drop_slab(void); #ifndef CONFIG_MMU #define randomize_va_space 0 @@ -1229,6 +1263,7 @@ void vmemmap_verify(pte_t *, int, unsigned long, unsigned long); int vmemmap_populate_basepages(struct page *start_page, unsigned long pages, int node); int vmemmap_populate(struct page *start_page, unsigned long pages, int node); +void vmemmap_populate_print_last(void); #endif /* __KERNEL__ */ #endif /* _LINUX_MM_H */ |