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| author | Dean Nelson <dnelson@redhat.com> | 2012-03-21 16:34:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-21 17:54:58 -0700 |
| commit | 385de35722c9a22917e7bc5e63cd83a8cffa5ecd (patch) | |
| tree | 41ae2e23e096d189cdf614cf1eaf0c8f9ddeeb3b /mm/mempolicy.c | |
| parent | 6d9d88d07e132259c35f9493b15429e19198489c (diff) | |
| download | op-kernel-dev-385de35722c9a22917e7bc5e63cd83a8cffa5ecd.zip op-kernel-dev-385de35722c9a22917e7bc5e63cd83a8cffa5ecd.tar.gz | |
thp: allow a hwpoisoned head page to be put back to LRU
Andrea Arcangeli pointed out to me that a check in __memory_failure()
which was intended to prevent THP tail pages from being checked for the
absence of the PG_lru flag (something that is always the case), was also
preventing THP head pages from being checked.
A THP head page could actually benefit from the call to shake_page() by
ending up being put back to a LRU, provided it had been waiting in a
pagevec array.
Andrea suggested that the "!PageTransCompound(p)" in the if-statement
should be replaced by a "!PageTransTail(p)", thus allowing THP head pages
to be checked and possibly shaken.
Signed-off-by: Dean Nelson <dnelson@redhat.com>
Cc: Jin Dongming <jin.dongming@np.css.fujitsu.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mempolicy.c')
0 files changed, 0 insertions, 0 deletions
