On Fri, Sep 21, 2012 at 11:46:18AM +0100, Mel Gorman wrote: > From: Shaohua Li <shli@xxxxxxxxxxxx> > > Changelog since V2 > o Fix BUG_ON triggered due to pages left on cc.migratepages > o Make compact_zone_order() require non-NULL arg `contended' > > Changelog since V1 > o only abort the compaction if lock is contended or run too long > o Rearranged the code by Andrea Arcangeli. > > isolate_migratepages_range() might isolate no pages if for example when > zone->lru_lock is contended and running asynchronous compaction. In this > case, we should abort compaction, otherwise, compact_zone will run a > useless loop and make zone->lru_lock is even contended. > > [minchan@xxxxxxxxxx: Putback pages isolated for migration if aborting] > [akpm@xxxxxxxxxxxxxxxxxxxx: compact_zone_order requires non-NULL arg contended] > Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> > Signed-off-by: Shaohua Li <shli@xxxxxxxxxxxx> > Signed-off-by: Mel Gorman <mgorman@xxxxxxx> > Acked-by: Rik van Riel <riel@xxxxxxxxxx> Acked-by: Minchan Kim <minchan@xxxxxxxxxx> -- Kind regards, Minchan Kim -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
