diff options
Diffstat (limited to 'include/linux/hugetlb.h')
| -rw-r--r-- | include/linux/hugetlb.h | 79 |
1 files changed, 62 insertions, 17 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 6e6d338641fe..205026175c42 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -22,7 +22,13 @@ struct mmu_gather; struct hugepage_subpool { spinlock_t lock; long count; - long max_hpages, used_hpages; + long max_hpages; /* Maximum huge pages or -1 if no maximum. */ + long used_hpages; /* Used count against maximum, includes */ + /* both alloced and reserved pages. */ + struct hstate *hstate; + long min_hpages; /* Minimum huge pages or -1 if no minimum. */ + long rsv_hpages; /* Pages reserved against global pool to */ + /* sasitfy minimum size. */ }; struct resv_map { @@ -38,11 +44,10 @@ extern int hugetlb_max_hstate __read_mostly; #define for_each_hstate(h) \ for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++) -struct hugepage_subpool *hugepage_new_subpool(long nr_blocks); +struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages, + long min_hpages); void hugepage_put_subpool(struct hugepage_subpool *spool); -int PageHuge(struct page *page); - void reset_vma_resv_huge_pages(struct vm_area_struct *vma); int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *); @@ -79,14 +84,13 @@ void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed); int dequeue_hwpoisoned_huge_page(struct page *page); bool isolate_huge_page(struct page *page, struct list_head *list); void putback_active_hugepage(struct page *page); -bool is_hugepage_active(struct page *page); void free_huge_page(struct page *page); #ifdef CONFIG_ARCH_WANT_HUGE_PMD_SHARE pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud); #endif -extern unsigned long hugepages_treat_as_movable; +extern int hugepages_treat_as_movable; extern int sysctl_hugetlb_shm_group; extern struct list_head huge_boot_pages; @@ -99,9 +103,9 @@ int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep); struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, int write); struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, - pmd_t *pmd, int write); + pmd_t *pmd, int flags); struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address, - pud_t *pud, int write); + pud_t *pud, int flags); int pmd_huge(pmd_t pmd); int pud_huge(pud_t pmd); unsigned long hugetlb_change_protection(struct vm_area_struct *vma, @@ -109,11 +113,6 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma, #else /* !CONFIG_HUGETLB_PAGE */ -static inline int PageHuge(struct page *page) -{ - return 0; -} - static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma) { } @@ -133,8 +132,8 @@ static inline void hugetlb_report_meminfo(struct seq_file *m) static inline void hugetlb_show_meminfo(void) { } -#define follow_huge_pmd(mm, addr, pmd, write) NULL -#define follow_huge_pud(mm, addr, pud, write) NULL +#define follow_huge_pmd(mm, addr, pmd, flags) NULL +#define follow_huge_pud(mm, addr, pud, flags) NULL #define prepare_hugepage_range(file, addr, len) (-EINVAL) #define pmd_huge(x) 0 #define pud_huge(x) 0 @@ -152,7 +151,6 @@ static inline bool isolate_huge_page(struct page *page, struct list_head *list) return false; } #define putback_active_hugepage(p) do {} while (0) -#define is_hugepage_active(x) false static inline unsigned long hugetlb_change_protection(struct vm_area_struct *vma, unsigned long address, unsigned long end, pgprot_t newprot) @@ -175,6 +173,52 @@ static inline void __unmap_hugepage_range(struct mmu_gather *tlb, } #endif /* !CONFIG_HUGETLB_PAGE */ +/* + * hugepages at page global directory. If arch support + * hugepages at pgd level, they need to define this. + */ +#ifndef pgd_huge +#define pgd_huge(x) 0 +#endif + +#ifndef pgd_write +static inline int pgd_write(pgd_t pgd) +{ + BUG(); + return 0; +} +#endif + +#ifndef pud_write +static inline int pud_write(pud_t pud) +{ + BUG(); + return 0; +} +#endif + +#ifndef is_hugepd +/* + * Some architectures requires a hugepage directory format that is + * required to support multiple hugepage sizes. For example + * a4fe3ce76 "powerpc/mm: Allow more flexible layouts for hugepage pagetables" + * introduced the same on powerpc. This allows for a more flexible hugepage + * pagetable layout. + */ +typedef struct { unsigned long pd; } hugepd_t; +#define is_hugepd(hugepd) (0) +#define __hugepd(x) ((hugepd_t) { (x) }) +static inline int gup_huge_pd(hugepd_t hugepd, unsigned long addr, + unsigned pdshift, unsigned long end, + int write, struct page **pages, int *nr) +{ + return 0; +} +#else +extern int gup_huge_pd(hugepd_t hugepd, unsigned long addr, + unsigned pdshift, unsigned long end, + int write, struct page **pages, int *nr); +#endif #define HUGETLB_ANON_FILE "anon_hugepage" @@ -311,7 +355,8 @@ static inline struct hstate *hstate_sizelog(int page_size_log) { if (!page_size_log) return &default_hstate; - return size_to_hstate(1 << page_size_log); + + return size_to_hstate(1UL << page_size_log); } static inline struct hstate *hstate_vma(struct vm_area_struct *vma) |