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>

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);
                 }
         }