| commit | d21b9e57c74ce82ac459e2ec8ce667db9b9da8b0 | |
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | |
| Tue, 26 Jul 2016 22:25:37 +0000 (26 15:25 -0700) | ||
| committer | Linus Torvalds <torvalds@linux-foundation.org> | |
| Tue, 26 Jul 2016 23:19:19 +0000 (26 16:19 -0700) | ||
| tree | e35f06f7e07e8bfbc0d1a7d19a52d6ccc87116d4 | treesnapshot (tar.gz zip) |
| parent | b5072380eb619786990cd9eab3ade05d09ccd89e | commitdiff |
thp: handle file pages in split_huge_pmd()
Splitting THP PMD is simple: just unmap it as in DAX case. This way we
can avoid memory overhead on page table allocation to deposit.
It's probably a good idea to try to allocation page table with
GFP_ATOMIC in __split_huge_pmd_locked() to avoid refaulting the area,
but clearing pmd should be good enough for now.
Unlike DAX, we also remove the page from rmap and drop reference.
pmd_young() is transfered to PageReferenced().
Link: http://lkml.kernel.org/r/1466021202-61880-15-git-send-email-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Splitting THP PMD is simple: just unmap it as in DAX case. This way we
can avoid memory overhead on page table allocation to deposit.
It's probably a good idea to try to allocation page table with
GFP_ATOMIC in __split_huge_pmd_locked() to avoid refaulting the area,
but clearing pmd should be good enough for now.
Unlike DAX, we also remove the page from rmap and drop reference.
pmd_young() is transfered to PageReferenced().
Link: http://lkml.kernel.org/r/1466021202-61880-15-git-send-email-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| mm/huge_memory.c | diffblobblamehistory |