| commit | af9e4d5f2de2eabdc7145e077ba48b2a638465c6 | |
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | |
| Tue, 26 Jul 2016 22:25:40 +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 | 9ac84a9f70046c63d080f99f03bb115745859d9d | treesnapshot (tar.gz zip) |
| parent | d21b9e57c74ce82ac459e2ec8ce667db9b9da8b0 | commitdiff |
thp: handle file COW faults
File COW for THP is handled on pte level: just split the pmd.
It's not clear how benefitial would be allocation of huge pages on COW
faults. And it would require some code to make them work.
I think at some point we can consider teaching khugepaged to collapse
pages in COW mappings, but allocating huge on fault is probably
overkill.
Link: http://lkml.kernel.org/r/1466021202-61880-16-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>
File COW for THP is handled on pte level: just split the pmd.
It's not clear how benefitial would be allocation of huge pages on COW
faults. And it would require some code to make them work.
I think at some point we can consider teaching khugepaged to collapse
pages in COW mappings, but allocating huge on fault is probably
overkill.
Link: http://lkml.kernel.org/r/1466021202-61880-16-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/memory.c | diffblobblamehistory |