Commit 0db63d7e authored by Mel Gorman's avatar Mel Gorman Committed by Linus Torvalds

mm: compaction: correct the nr_strict va isolated check for CMA

Thierry reported that the "iron out" patch for isolate_freepages_block()
had problems due to the strict check being too strict with "mm:
compaction: Iron out isolate_freepages_block() and
isolate_freepages_range() -fix1".  It's possible that more pages than
necessary are isolated but the check still fails and I missed that this
fix was not picked up before RC1.  This same problem has been identified
in 3.7-RC1 by Tony Prisk and should be addressed by the following patch.
Signed-off-by: default avatarMel Gorman <>
Tested-by: default avatarTony Prisk <>
Reported-by: default avatarThierry Reding <>
Acked-by: default avatarRik van Riel <>
Acked-by: default avatarMinchan Kim <>
Cc: Richard Davies <>
Cc: Shaohua Li <>
Cc: Avi Kivity <>
Cc: Arnd Bergmann <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent bac71696
......@@ -346,7 +346,7 @@ static unsigned long isolate_freepages_block(struct compact_control *cc,
* pages requested were isolated. If there were any failures, 0 is
* returned and CMA will fail.
if (strict && nr_strict_required != total_isolated)
if (strict && nr_strict_required > total_isolated)
total_isolated = 0;
if (locked)
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