X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=include%2Flinux%2Fmm.h;h=516e149443397dcf712e4e62aca6fb3c78e542b6;hb=30bdbb78009e67767983085e302bec6d97afc679;hp=839d9e9a1c38618c9a8a2c5f18682c75d22f1348;hpb=a016af2e70bfca23f2f5de7d8708157b86ea374d;p=mirror_ubuntu-jammy-kernel.git diff --git a/include/linux/mm.h b/include/linux/mm.h index 839d9e9a1c38..516e14944339 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -200,11 +201,13 @@ extern unsigned int kobjsize(const void *objp); #endif #ifdef CONFIG_STACK_GROWSUP -#define VM_STACK_FLAGS (VM_GROWSUP | VM_STACK_DEFAULT_FLAGS | VM_ACCOUNT) +#define VM_STACK VM_GROWSUP #else -#define VM_STACK_FLAGS (VM_GROWSDOWN | VM_STACK_DEFAULT_FLAGS | VM_ACCOUNT) +#define VM_STACK VM_GROWSDOWN #endif +#define VM_STACK_FLAGS (VM_STACK | VM_STACK_DEFAULT_FLAGS | VM_ACCOUNT) + /* * Special vmas that are non-mergable, non-mlock()able. * Note: mm/huge_memory.c VM_NO_THP depends on this definition. @@ -329,6 +332,13 @@ struct inode; #define page_private(page) ((page)->private) #define set_page_private(page, v) ((page)->private = (v)) +#if !defined(__HAVE_ARCH_PTE_DEVMAP) || !defined(CONFIG_TRANSPARENT_HUGEPAGE) +static inline int pmd_devmap(pmd_t pmd) +{ + return 0; +} +#endif + /* * FIXME: take this include out, include page-flags.h in * files which need it (119 of them) @@ -410,39 +420,17 @@ static inline int is_vmalloc_or_module_addr(const void *x) extern void kvfree(const void *addr); -static inline void compound_lock(struct page *page) +static inline atomic_t *compound_mapcount_ptr(struct page *page) { -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - VM_BUG_ON_PAGE(PageSlab(page), page); - bit_spin_lock(PG_compound_lock, &page->flags); -#endif + return &page[1].compound_mapcount; } -static inline void compound_unlock(struct page *page) +static inline int compound_mapcount(struct page *page) { -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - VM_BUG_ON_PAGE(PageSlab(page), page); - bit_spin_unlock(PG_compound_lock, &page->flags); -#endif -} - -static inline unsigned long compound_lock_irqsave(struct page *page) -{ - unsigned long uninitialized_var(flags); -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - local_irq_save(flags); - compound_lock(page); -#endif - return flags; -} - -static inline void compound_unlock_irqrestore(struct page *page, - unsigned long flags) -{ -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - compound_unlock(page); - local_irq_restore(flags); -#endif + if (!PageCompound(page)) + return 0; + page = compound_head(page); + return atomic_read(compound_mapcount_ptr(page)) + 1; } /* @@ -455,61 +443,29 @@ static inline void page_mapcount_reset(struct page *page) atomic_set(&(page)->_mapcount, -1); } +int __page_mapcount(struct page *page); + static inline int page_mapcount(struct page *page) { VM_BUG_ON_PAGE(PageSlab(page), page); - return atomic_read(&page->_mapcount) + 1; -} - -static inline int page_count(struct page *page) -{ - return atomic_read(&compound_head(page)->_count); -} -static inline bool __compound_tail_refcounted(struct page *page) -{ - return PageAnon(page) && !PageSlab(page) && !PageHeadHuge(page); -} - -/* - * This takes a head page as parameter and tells if the - * tail page reference counting can be skipped. - * - * For this to be safe, PageSlab and PageHeadHuge must remain true on - * any given page where they return true here, until all tail pins - * have been released. - */ -static inline bool compound_tail_refcounted(struct page *page) -{ - VM_BUG_ON_PAGE(!PageHead(page), page); - return __compound_tail_refcounted(page); + if (unlikely(PageCompound(page))) + return __page_mapcount(page); + return atomic_read(&page->_mapcount) + 1; } -static inline void get_huge_page_tail(struct page *page) +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +int total_mapcount(struct page *page); +#else +static inline int total_mapcount(struct page *page) { - /* - * __split_huge_page_refcount() cannot run from under us. - */ - VM_BUG_ON_PAGE(!PageTail(page), page); - VM_BUG_ON_PAGE(page_mapcount(page) < 0, page); - VM_BUG_ON_PAGE(atomic_read(&page->_count) != 0, page); - if (compound_tail_refcounted(compound_head(page))) - atomic_inc(&page->_mapcount); + return page_mapcount(page); } +#endif -extern bool __get_page_tail(struct page *page); - -static inline void get_page(struct page *page) +static inline int page_count(struct page *page) { - if (unlikely(PageTail(page))) - if (likely(__get_page_tail(page))) - return; - /* - * 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); + return atomic_read(&compound_head(page)->_count); } static inline struct page *virt_to_head_page(const void *x) @@ -528,7 +484,8 @@ static inline void init_page_count(struct page *page) atomic_set(&page->_count, 1); } -void put_page(struct page *page); +void __put_page(struct page *page); + void put_pages_list(struct list_head *pages); void split_page(struct page *page, unsigned int order); @@ -547,6 +504,9 @@ enum compound_dtor_id { COMPOUND_PAGE_DTOR, #ifdef CONFIG_HUGETLB_PAGE HUGETLB_PAGE_DTOR, +#endif +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + TRANSHUGE_PAGE_DTOR, #endif NR_COMPOUND_DTORS, }; @@ -577,6 +537,8 @@ static inline void set_compound_order(struct page *page, unsigned int order) page[1].compound_order = order; } +void free_compound_page(struct page *page); + #ifdef CONFIG_MMU /* * Do pte_mkwrite, but only if the vma says VM_WRITE. We do this when @@ -704,6 +666,51 @@ static inline enum zone_type page_zonenum(const struct page *page) return (page->flags >> ZONES_PGSHIFT) & ZONES_MASK; } +#ifdef CONFIG_ZONE_DEVICE +void get_zone_device_page(struct page *page); +void put_zone_device_page(struct page *page); +static inline bool is_zone_device_page(const struct page *page) +{ + return page_zonenum(page) == ZONE_DEVICE; +} +#else +static inline void get_zone_device_page(struct page *page) +{ +} +static inline void put_zone_device_page(struct page *page) +{ +} +static inline bool is_zone_device_page(const struct page *page) +{ + return false; +} +#endif + +static inline void get_page(struct page *page) +{ + page = compound_head(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); + + if (unlikely(is_zone_device_page(page))) + get_zone_device_page(page); +} + +static inline void put_page(struct page *page) +{ + page = compound_head(page); + + if (put_page_testzero(page)) + __put_page(page); + + if (unlikely(is_zone_device_page(page))) + put_zone_device_page(page); +} + #if defined(CONFIG_SPARSEMEM) && !defined(CONFIG_SPARSEMEM_VMEMMAP) #define SECTION_IN_PAGE_FLAGS #endif @@ -993,10 +1000,21 @@ static inline pgoff_t page_file_index(struct page *page) /* * Return true if this page is mapped into pagetables. + * For compound page it returns true if any subpage of compound page is mapped. */ -static inline int page_mapped(struct page *page) -{ - return atomic_read(&(page)->_mapcount) >= 0; +static inline bool page_mapped(struct page *page) +{ + int i; + if (likely(!PageCompound(page))) + return atomic_read(&page->_mapcount) >= 0; + page = compound_head(page); + if (atomic_read(compound_mapcount_ptr(page)) >= 0) + return true; + for (i = 0; i < hpage_nr_pages(page); i++) { + if (atomic_read(&page[i]._mapcount) >= 0) + return true; + } + return false; } /* @@ -1084,7 +1102,7 @@ static inline bool shmem_mapping(struct address_space *mapping) } #endif -extern int can_do_mlock(void); +extern bool can_do_mlock(void); extern int user_shm_lock(size_t, struct user_struct *); extern void user_shm_unlock(size_t, struct user_struct *); @@ -1178,7 +1196,8 @@ int invalidate_inode_page(struct page *page); extern int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, unsigned int flags); extern int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm, - unsigned long address, unsigned int fault_flags); + unsigned long address, unsigned int fault_flags, + bool *unlocked); #else static inline int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long address, @@ -1190,7 +1209,7 @@ static inline int handle_mm_fault(struct mm_struct *mm, } static inline int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm, unsigned long address, - unsigned int fault_flags) + unsigned int fault_flags, bool *unlocked) { /* should never happen if there's no MMU */ BUG(); @@ -1324,8 +1343,7 @@ static inline int stack_guard_page_end(struct vm_area_struct *vma, !vma_growsup(vma->vm_next, addr); } -extern struct task_struct *task_of_stack(struct task_struct *task, - struct vm_area_struct *vma, bool in_group); +int vma_is_stack_for_task(struct vm_area_struct *vma, struct task_struct *t); extern unsigned long move_page_tables(struct vm_area_struct *vma, unsigned long old_addr, struct vm_area_struct *new_vma, @@ -1444,6 +1462,13 @@ static inline void sync_mm_rss(struct mm_struct *mm) } #endif +#ifndef __HAVE_ARCH_PTE_DEVMAP +static inline int pte_devmap(pte_t pte) +{ + return 0; +} +#endif + int vma_wants_writenotify(struct vm_area_struct *vma); extern pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr, @@ -2114,7 +2139,7 @@ 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); + pfn_t pfn); int vm_iomap_memory(struct vm_area_struct *vma, phys_addr_t start, unsigned long len); @@ -2224,7 +2249,14 @@ pud_t *vmemmap_pud_populate(pgd_t *pgd, unsigned long addr, int node); pmd_t *vmemmap_pmd_populate(pud_t *pud, unsigned long addr, int node); pte_t *vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node); void *vmemmap_alloc_block(unsigned long size, int node); -void *vmemmap_alloc_block_buf(unsigned long size, int node); +struct vmem_altmap; +void *__vmemmap_alloc_block_buf(unsigned long size, int node, + struct vmem_altmap *altmap); +static inline void *vmemmap_alloc_block_buf(unsigned long size, int node) +{ + return __vmemmap_alloc_block_buf(size, node, NULL); +} + void vmemmap_verify(pte_t *, int, unsigned long, unsigned long); int vmemmap_populate_basepages(unsigned long start, unsigned long end, int node); @@ -2246,7 +2278,7 @@ extern int memory_failure(unsigned long pfn, int trapno, int flags); extern void memory_failure_queue(unsigned long pfn, int trapno, int flags); extern int unpoison_memory(unsigned long pfn); extern int get_hwpoison_page(struct page *page); -extern void put_hwpoison_page(struct page *page); +#define put_hwpoison_page(page) put_page(page) extern int sysctl_memory_failure_early_kill; extern int sysctl_memory_failure_recovery; extern void shake_page(struct page *p, int access);