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| author | Mel Gorman <mgorman@suse.de> | 2012-11-02 11:33:45 +0000 |
|---|---|---|
| committer | Mel Gorman <mgorman@suse.de> | 2012-12-11 14:42:42 +0000 |
| commit | 4daae3b4b9e49b7e0935499a352f1c59d90287d2 (patch) | |
| tree | 2ac600b955c89e3b1b2070110a9b7293a4511b19 /include/linux/huge_mm.h | |
| parent | 149c33e1c98f83050870514f380902dc6d617bd5 (diff) | |
| download | lwn-4daae3b4b9e49b7e0935499a352f1c59d90287d2.tar.gz lwn-4daae3b4b9e49b7e0935499a352f1c59d90287d2.zip | |
mm: mempolicy: Use _PAGE_NUMA to migrate pages
Note: Based on "mm/mpol: Use special PROT_NONE to migrate pages" but
sufficiently different that the signed-off-bys were dropped
Combine our previous _PAGE_NUMA, mpol_misplaced and migrate_misplaced_page()
pieces into an effective migrate on fault scheme.
Note that (on x86) we rely on PROT_NONE pages being !present and avoid
the TLB flush from try_to_unmap(TTU_MIGRATION). This greatly improves the
page-migration performance.
Based-on-work-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Diffstat (limited to 'include/linux/huge_mm.h')
| -rw-r--r-- | include/linux/huge_mm.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index a1d26a98c655..dabb5108d6c0 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -160,8 +160,8 @@ static inline struct page *compound_trans_head(struct page *page) return page; } -extern int do_huge_pmd_numa_page(struct mm_struct *mm, unsigned long addr, - pmd_t pmd, pmd_t *pmdp); +extern int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, + unsigned long addr, pmd_t pmd, pmd_t *pmdp); #else /* CONFIG_TRANSPARENT_HUGEPAGE */ #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) @@ -200,9 +200,10 @@ static inline int pmd_trans_huge_lock(pmd_t *pmd, return 0; } -static inline int do_huge_pmd_numa_page(struct mm_struct *mm, unsigned long addr, - pmd_t pmd, pmd_t *pmdp) +static inline int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, + unsigned long addr, pmd_t pmd, pmd_t *pmdp) { + return 0; } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |