Merge commit 'v2.6.38-rc3' into perf/core

Merge reason: Pick up latest fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 11 insertions, 0 deletions

diff --git a/mm/compaction.c b/mm/compaction.c
index 6d592a021072..8be430b812de 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -406,6 +406,10 @@ static int compact_finished(struct zone *zone,
         if (!zone_watermark_ok(zone, cc->order, watermark, 0, 0))
                 return COMPACT_CONTINUE;
 
+        /*
+         * order == -1 is expected when compacting via
+         * /proc/sys/vm/compact_memory
+         */
         if (cc->order == -1)
                 return COMPACT_CONTINUE;
 
@@ -454,6 +458,13 @@ unsigned long compaction_suitable(struct zone *zone, int order)
                 return COMPACT_SKIPPED;
 
         /*
+         * order == -1 is expected when compacting via
+         * /proc/sys/vm/compact_memory
+         */
+        if (order == -1)
+                return COMPACT_CONTINUE;
+
+        /*
          * fragmentation index determines if allocation failures are due to
          * low memory or external fragmentation
          *