Messages in this thread Patch in this message |  | | | Date | Mon, 14 Mar 2011 18:04:25 +0000 | | Subject | [RFC][PATCH v2 19/23] (x86) __vmalloc: add gfp flags variant of pte, pmd, and pud allocation | | From | Prasad Joshi <> |
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__vmalloc: propagating GFP allocation flag.
- adds functions to allow caller to pass the GFP flag for memory allocation - helps in fixing the Bug 30702 (__vmalloc(GFP_NOFS) can callback file system evict_inode).
Signed-off-by: Anand Mitra <mitra@kqinfotech.com> Signed-off-by: Prasad Joshi <prasadjoshi124@gmail.com> --- Chnagelog: arch/x86/include/asm/pgalloc.h | 17 +++++++++++++++-- arch/x86/mm/pgtable.c | 8 +++++++- 2 files changed, 22 insertions(+), 3 deletions(-) --- diff --git a/arch/x86/include/asm/pgalloc.h b/arch/x86/include/asm/pgalloc.h index b4389a4..db83bd4 100644 --- a/arch/x86/include/asm/pgalloc.h +++ b/arch/x86/include/asm/pgalloc.h @@ -34,6 +34,7 @@ extern pgd_t *pgd_alloc(struct mm_struct *); extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); +extern pte_t *__pte_alloc_one_kernel(struct mm_struct *, unsigned long, gfp_t); extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
/* Should really implement gc for free page table pages. This could be @@ -78,9 +79,15 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, #define pmd_pgtable(pmd) pmd_page(pmd)
#if PAGETABLE_LEVELS > 2 +static inline pmd_t * +__pmd_alloc_one(struct mm_struct *mm, unsigned long addr, gfp_t gfp_mask) +{ + return (pmd_t *)get_zeroed_page(gfp_mask); +} + static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) { - return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); + return __pmd_alloc_one(mm, addr, GFP_KERNEL | __GFP_REPEAT); }
static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) @@ -114,9 +121,15 @@ static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud))); }
+static inline pud_t * +__pud_alloc_one(struct mm_struct *mm, unsigned long addr, gfp_t gfp_mask) +{ + return (pud_t *)get_zeroed_page(gfp_mask); +} + static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) { - return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT); + return __pud_alloc_one(mm, addr, GFP_KERNEL | __GFP_REPEAT); }
static inline void pud_free(struct mm_struct *mm, pud_t *pud) diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index 500242d..c42a27c 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -15,9 +15,15 @@
gfp_t __userpte_alloc_gfp = PGALLOC_GFP | PGALLOC_USER_GFP;
+pte_t * +__pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address, gfp_t gfp_mask) +{ + return (pte_t *)__get_free_page(gfp_mask | __GFP_NOTRACK | __GFP_ZERO); +} + pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) { - return (pte_t *)__get_free_page(PGALLOC_GFP); + return __pte_alloc_one_kernel(mm, address, GFP_KERNEL | __GFP_REPEAT); }
pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
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