diff options
| author |   KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2008-04-29 00:58:21 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 08:05:58 -0700 |
| commit | 86051ca5eaf5e560113ec7673462804c54284456 (patch) | |
| tree | e2e6fd3df079f85c43c7e164569a8c962f91e537 /mm/vmscan.c | |
| parent | drivers: fix integer as NULL pointer warnings (diff) | |
| download | linux-dev-86051ca5eaf5e560113ec7673462804c54284456.tar.xz linux-dev-86051ca5eaf5e560113ec7673462804c54284456.zip | |
mm: fix usemap initialization
usemap must be initialized only when pfn is within zone. If not, it corrupts
memory.
And this patch also reduces the number of calls to set_pageblock_migratetype()
from
(pfn & (pageblock_nr_pages -1)
to
!(pfn & (pageblock_nr_pages-1)
it should be called once per pageblock.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Shi Weihua <shiwh@cn.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions