Commit cc7e3940 authored Mar 31, 2017 by Joe Thornber Committed by Mike Snitzer Mar 31, 2017

dm cache policy smq: make the cleaner policy write-back more aggressively



By ignoring the sentinels the cleaner policy is able to write-back dirty
cache data much faster.  There is no reason to respect the sentinels,
which denote that a block was changed recently, when using the cleaner
policy given that the cleaner is tasked with writing back all dirty
data.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

parent 449b668c

drivers/md/dm-cache-policy-smq.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1166,7 +1166,7 @@ static void queue_writeback(struct smq_policy *mq)
		struct policy_work work;
		struct entry *e;

		e = q_peek(&mq->dirty, mq->dirty.nr_levels, false);
		e = q_peek(&mq->dirty, mq->dirty.nr_levels, !mq->migrations_allowed);
		if (e) {
		mark_pending(mq, e);
		q_del(&mq->dirty, e);