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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2008-04-29 00:58:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-29 08:05:58 -0700
commit86051ca5eaf5e560113ec7673462804c54284456 (patch)
treee2e6fd3df079f85c43c7e164569a8c962f91e537 /mm/backing-dev.c
parenta01e035ebb552223c03f2d9138ffc73f2d4d3965 (diff)
downloadop-kernel-dev-86051ca5eaf5e560113ec7673462804c54284456.zip
op-kernel-dev-86051ca5eaf5e560113ec7673462804c54284456.tar.gz
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 'mm/backing-dev.c')
0 files changed, 0 insertions, 0 deletions
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