tree 9bc2493c7ea9a21f10f0d4ba8cda050bd6eb4b33
parent 3b3636924dfe1e80f9bef2c0dc1207e16f3b078a
author Gioh Kim <gioh.kim@lge.com> 1429139613 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1429140917 -0700

mm/compaction: reset compaction scanner positions

When the compaction is activated via /proc/sys/vm/compact_memory it would
better scan the whole zone.  And some platforms, for instance ARM, have
the start_pfn of a zone at zero.  Therefore the first try to compact via
/proc doesn't work.  It needs to reset the compaction scanner position
first.

Signed-off-by: Gioh Kim <gioh.kim@lge.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>