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dm cache policy smq: be more aggressive about triggering a writeback 

If there are no clean entries to demote we really want to writeback
immediately.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Joe Thornber 2017-05-11 05:09:38 -04:00 committed by Mike Snitzer
parent a8cd1eba61
commit 78c45607b9
1 changed files with 1 additions and 1 deletions
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2
drivers/md/dm-cache-policy-smq.c
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@ -1192,7 +1192,7 @@ static void queue_demotion(struct smq_policy *mq)
e = q_peek(&mq->clean, mq->clean.nr_levels / 2, true); e = q_peek(&mq->clean, mq->clean.nr_levels / 2, true);
if (!e) { if (!e) {
if (!clean_target_met(mq, false)) if (!clean_target_met(mq, true))
queue_writeback(mq); queue_writeback(mq);
return; return;
} }