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authorJoe Thornber <ejt@redhat.com>2017-11-08 14:09:38 +0300
committerMike Snitzer <snitzer@redhat.com>2017-11-10 23:45:02 +0300
commitdeb71918ae29e23ff7f4537f5ff654f8b6580af2 (patch)
tree8c43506f892804b4ebc3cf004ae2b9e19ea29b1b /drivers/md
parent1e72a8e809f030bd4e318a49c497ee38e47e82c1 (diff)
downloadlinux-deb71918ae29e23ff7f4537f5ff654f8b6580af2.tar.xz
dm cache policy smq: take origin idle status into account when queuing writebacks
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>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-cache-policy-smq.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/md/dm-cache-policy-smq.c b/drivers/md/dm-cache-policy-smq.c
index 42e5c4b59889..99fae819a0e7 100644
--- a/drivers/md/dm-cache-policy-smq.c
+++ b/drivers/md/dm-cache-policy-smq.c
@@ -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);
}
}