diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2016-03-18 00:20:04 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-18 01:09:34 +0300 |
| commit | 2a52bcbcc688eecead2953143f7ef695b8e44575 (patch) | |
| tree | b2e372875693775e97fc4e9373c5a630d2a1dcc0 /include/linux/huge_mm.h | |
| parent | b97731992d00f09456726bfc5ab6641c07773038 (diff) | |
| download | linux-2a52bcbcc688eecead2953143f7ef695b8e44575.tar.xz | |
rmap: extend try_to_unmap() to be usable by split_huge_page()
Add support for two ttu_flags:
- TTU_SPLIT_HUGE_PMD would split PMD if it's there, before trying to
unmap page;
- TTU_RMAP_LOCKED indicates that caller holds relevant rmap lock;
Also, change rwc->done to !page_mapcount() instead of !page_mapped().
try_to_unmap() works on pte level, so we are really interested in the
mappedness of this small page rather than of the compound page it's a
part of.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/huge_mm.h')
| -rw-r--r-- | include/linux/huge_mm.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index a4cecb4801ec..01ad22e938b0 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -106,6 +106,9 @@ void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, __split_huge_pmd(__vma, __pmd, __address); \ } while (0) + +void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address); + #if HPAGE_PMD_ORDER >= MAX_ORDER #error "hugepages can't be allocated by the buddy allocator" #endif @@ -173,6 +176,10 @@ static inline int split_huge_page(struct page *page) static inline void deferred_split_huge_page(struct page *page) {} #define split_huge_pmd(__vma, __pmd, __address) \ do { } while (0) + +static inline void split_huge_pmd_address(struct vm_area_struct *vma, + unsigned long address) {} + static inline int hugepage_madvise(struct vm_area_struct *vma, unsigned long *vm_flags, int advice) { |