diff options
| author | Balbir Singh <bsingharora@gmail.com> | 2017-05-02 15:17:04 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-06-05 19:03:10 +1000 |
| commit | de3b87611dd1f3c00f4e42fe298457260ea781e0 (patch) | |
| tree | 77fc83dc2b9ac76f71600757674d959c4a6a33fe /arch/powerpc/include/asm/nohash | |
| parent | c5cee6421cd651446b93c231f0ab8ff2530ba25d (diff) | |
powerpc/mm/book(e)(3s)/64: Add page table accounting
Introduce a helper pgtable_gfp_flags() which
just returns the current gfp flags and adds
__GFP_ACCOUNT to account for page table allocation.
The generic helper is added to include/asm/pgalloc.h
and has two variants - WARNING ugly bits ahead
1. If the header is included from a module, no check
for mm == &init_mm is done, since init_mm is not
exported
2. For kernel includes, the check is done and required
see (3e79ec7 arch: x86: charge page tables to kmemcg)
The fundamental assumption is that no module should be
doing pgd/pud/pmd and pte alloc's on behalf of init_mm
directly.
NOTE: This adds an overhead to pmd/pud/pgd allocations
similar to x86. The other alternative was to implement
pmd_alloc_kernel/pud_alloc_kernel and pgd_alloc_kernel
with their offset variants.
For 4k page size, pte_alloc_one no longer calls
pte_alloc_one_kernel.
Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/nohash')
| -rw-r--r-- | arch/powerpc/include/asm/nohash/64/pgalloc.h | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/powerpc/include/asm/nohash/64/pgalloc.h b/arch/powerpc/include/asm/nohash/64/pgalloc.h index 897d2e1c8a9b..9721c7867b9c 100644 --- a/arch/powerpc/include/asm/nohash/64/pgalloc.h +++ b/arch/powerpc/include/asm/nohash/64/pgalloc.h @@ -43,7 +43,8 @@ extern struct kmem_cache *pgtable_cache[]; static inline pgd_t *pgd_alloc(struct mm_struct *mm) { - return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), GFP_KERNEL); + return kmem_cache_alloc(PGT_CACHE(PGD_INDEX_SIZE), + pgtable_gfp_flags(mm, GFP_KERNEL)); } static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) @@ -57,7 +58,8 @@ static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr) { - return kmem_cache_alloc(PGT_CACHE(PUD_INDEX_SIZE), GFP_KERNEL); + return kmem_cache_alloc(PGT_CACHE(PUD_INDEX_SIZE), + pgtable_gfp_flags(mm, GFP_KERNEL)); } static inline void pud_free(struct mm_struct *mm, pud_t *pud) @@ -96,7 +98,7 @@ static inline pgtable_t pte_alloc_one(struct mm_struct *mm, struct page *page; pte_t *pte; - pte = pte_alloc_one_kernel(mm, address); + pte = (pte_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO | __GFP_ACCOUNT); if (!pte) return NULL; page = virt_to_page(pte); @@ -189,7 +191,8 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t table, static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) { - return kmem_cache_alloc(PGT_CACHE(PMD_CACHE_INDEX), GFP_KERNEL); + return kmem_cache_alloc(PGT_CACHE(PMD_CACHE_INDEX), + pgtable_gfp_flags(mm, GFP_KERNEL)); } static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) |