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| author | Kautuk Consul <consul.kautuk@gmail.com> | 2011-11-01 01:09:11 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-01 01:30:49 +0100 |
| commit | 3f380998aeb51b99d5d22cadb41162e1e9db70d2 (patch) | |
| tree | 1d5bb20368b06c7b86e7257771209795bd764f00 /mm/page-writeback.c | |
| parent | mm: fix kunmap_high() comment (diff) | |
| download | linux-3f380998aeb51b99d5d22cadb41162e1e9db70d2.tar.xz linux-3f380998aeb51b99d5d22cadb41162e1e9db70d2.zip | |
vmscan.c: fix invalid strict_strtoul() check in write_scan_unevictable_node()
write_scan_unevictable_node() checks the value req returned by
strict_strtoul() and returns 1 if req is 0.
However, when strict_strtoul() returns 0, it means successful conversion
of buf to unsigned long.
Due to this, the function was not proceeding to scan the zones for
unevictable pages even though we write a valid value to the
scan_unevictable_pages sys file.
Change this check slightly to check for invalid value in buf as well as 0
value stored in res after successful conversion via strict_strtoul. In
both cases, we do not perform the scanning of this node's zones.
Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page-writeback.c')
0 files changed, 0 insertions, 0 deletions