]> git.baikalelectronics.ru Git - kernel.git/commit
mm: numa: ensure anon_vma is locked to prevent parallel THP splits
authorMel Gorman <mgorman@suse.de>
Thu, 19 Dec 2013 01:08:38 +0000 (17:08 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 19 Dec 2013 03:04:51 +0000 (19:04 -0800)
commit91220310e4fc8877af8a51428ac6464886eef161
tree3a9dd7e524a784904c3e05cab0586bff349c45d6
parent050e0a973bdd4c5e1416ade47654487c1f8f10c6
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>
mm/huge_memory.c