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dm cache policy smq: take origin idle status into account when queuing writebacks

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If the origin device is idle try and writeback more data.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Joe Thornber 2017-11-08 06:09:38 -05:00 committed by Mike Snitzer
parent 1e72a8e809
commit deb71918ae
1 changed files with 4 additions and 4 deletions
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8
drivers/md/dm-cache-policy-smq.c
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@ -1158,13 +1158,13 @@ static void clear_pending(struct smq_policy *mq, struct entry *e)
e->pending_work = false;
}
static void queue_writeback(struct smq_policy *mq)
static void queue_writeback(struct smq_policy *mq, bool idle)
{
int r;
struct policy_work work;
struct entry *e;
e = q_peek(&mq->dirty, mq->dirty.nr_levels, !mq->migrations_allowed);
e = q_peek(&mq->dirty, mq->dirty.nr_levels, idle);
if (e) {
mark_pending(mq, e);
q_del(&mq->dirty, e);
@ -1193,7 +1193,7 @@ static void queue_demotion(struct smq_policy *mq)
e = q_peek(&mq->clean, mq->clean.nr_levels / 2, true);
if (!e) {
if (!clean_target_met(mq, true))
queue_writeback(mq);
queue_writeback(mq, false);
return;
}
@ -1429,7 +1429,7 @@ static int smq_get_background_work(struct dm_cache_policy *p, bool idle,
r = btracker_issue(mq->bg_work, result);
if (r == -ENODATA) {
if (!clean_target_met(mq, idle)) {
queue_writeback(mq);
queue_writeback(mq, idle);
r = btracker_issue(mq->bg_work, result);
}
}