On 09/20/2012 10:04 AM, 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 <mgor...@suse.de>
Acked-by: Rik van Riel <r...@redhat.com>
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