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authorMel Gorman <mgorman@suse.de>2013-12-19 05:08:38 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-12-19 07:04:51 +0400
commitc3a489cac38d43ea6dc4ac240473b44b46deecf7 (patch)
tree3a9dd7e524a784904c3e05cab0586bff349c45d6 /scripts/headers_check.pl
parent0c5f83c23ca703d32f930393825487257a5cde6d (diff)
downloadlinux-c3a489cac38d43ea6dc4ac240473b44b46deecf7.tar.xz
mm: numa: ensure anon_vma is locked to prevent parallel THP splits
The anon_vma lock prevents parallel THP splits and any associated complexity that arises when handling splits during THP migration. This patch checks if the lock was successfully acquired and bails from THP migration if it failed for any reason. Signed-off-by: Mel Gorman <mgorman@suse.de> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Alex Thorlton <athorlton@sgi.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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