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author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2012-12-12 13:51:14 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-12 17:38:32 -0800 |
commit | 3ea41e6210fea3b234b6cb3e9443e75975850bbf (patch) | |
tree | 1c8490271a6cffa9b43858e0f29d6ddab0122fac /mm/compaction.c | |
parent | 79da5407eeadc740fbf4b45d6df7d7f8e6adaf2c (diff) | |
download | op-kernel-dev-3ea41e6210fea3b234b6cb3e9443e75975850bbf.zip op-kernel-dev-3ea41e6210fea3b234b6cb3e9443e75975850bbf.tar.gz |
thp: avoid race on multiple parallel page faults to the same page
pmd value is stable only with mm->page_table_lock taken. After taking
the lock we need to check that nobody modified the pmd before changing it.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: David Rientjes <rientjes@google.com>
Reviewed-by: Bob Liu <lliubbo@gmail.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 'mm/compaction.c')
0 files changed, 0 insertions, 0 deletions