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| author | Hugh Dickins <hughd@google.com> | 2018-12-01 01:10:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-05 21:31:57 +0300 |
| commit | 8797f2f4fe0d555d0869b7c2704da146363bd350 (patch) | |
| tree | d8ee78987b645062ac966777d010e4655cf3be29 /mm/percpu-internal.h | |
| parent | d31ff4722f45560a6daf3df9d15a6b88da0e5080 (diff) | |
| download | linux-8797f2f4fe0d555d0869b7c2704da146363bd350.tar.xz | |
mm/khugepaged: collapse_shmem() stop if punched or truncated
commit 701270fa193aadf00bdcf607738f64997275d4c7 upstream.
Huge tmpfs testing showed that although collapse_shmem() recognizes a
concurrently truncated or hole-punched page correctly, its handling of
holes was liable to refill an emptied extent. Add check to stop that.
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.1811261522040.2275@eggly.anvils
Fixes: f3f0e1d2150b2 ("khugepaged: add support of collapse for tmpfs/shmem pages")
Signed-off-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Matthew Wilcox <willy@infradead.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: <stable@vger.kernel.org> [4.8+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'mm/percpu-internal.h')
0 files changed, 0 insertions, 0 deletions