Messages in this thread | | | Date | Tue, 25 Sep 2012 16:35:57 +0900 | From | Minchan Kim <> | Subject | Re: [PATCH 6/9] mm: compaction: Acquire the zone->lock as late as possible |
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On Fri, Sep 21, 2012 at 11:46:20AM +0100, Mel Gorman wrote: > Compactions free scanner acquires the zone->lock when checking for PageBuddy > pages and isolating them. It does this even if there are no PageBuddy pages > in the range. > > This patch defers acquiring the zone lock for as long as possible. In the > event there are no free pages in the pageblock then the lock will not be > acquired at all which reduces contention on zone->lock. > > Signed-off-by: Mel Gorman <mgorman@suse.de> > Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Minchan Kim <minchan@kernel.org>
-- Kind regards, Minchan Kim
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