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authorAdam Litke <agl@us.ibm.com>2008-09-02 23:35:38 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2008-09-03 04:21:37 +0200
commit344c790e3821dac37eb742ddd0b611a300f78b9a (patch)
treeaf7aad0ef87e320c9bfa84c9f14b32c095c0918c /mm/filemap.c
parentNTFS: update homepage (diff)
downloadlinux-344c790e3821dac37eb742ddd0b611a300f78b9a.tar.xz
linux-344c790e3821dac37eb742ddd0b611a300f78b9a.zip
mm: make setup_zone_migrate_reserve() aware of overlapping nodes
I have gotten to the root cause of the hugetlb badness I reported back on August 15th. My system has the following memory topology (note the overlapping node): Node 0 Memory: 0x8000000-0x44000000 Node 1 Memory: 0x0-0x8000000 0x44000000-0x80000000 setup_zone_migrate_reserve() scans the address range 0x0-0x8000000 looking for a pageblock to move onto the MIGRATE_RESERVE list. Finding no candidates, it happily continues the scan into 0x8000000-0x44000000. When a pageblock is found, the pages are moved to the MIGRATE_RESERVE list on the wrong zone. Oops. setup_zone_migrate_reserve() should skip pageblocks in overlapping nodes. Signed-off-by: Adam Litke <agl@us.ibm.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Nishanth Aravamudan <nacc@us.ibm.com> Cc: Andy Whitcroft <apw@shadowen.org> Cc: <stable@kernel.org> [2.6.25.x, 2.6.26.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/filemap.c')
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