dm cache policy smq: put newly promoted entries at the top of the multiqueue

This stops entries bouncing in and out of the cache quickly.

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

diff --git a/drivers/md/dm-cache-policy-smq.c b/drivers/md/dm-cache-policy-smq.c
index 5aa8f43..54421a8 100644 (file)
--- a/drivers/md/dm-cache-policy-smq.c
+++ b/drivers/md/dm-cache-policy-smq.c
@@ -1452,6 +1452,7 @@ static void __complete_background_work(struct smq_policy *mq,
                clear_pending(mq, e);
                if (success) {
                        e->oblock = work->oblock;
+                       e->level = NR_CACHE_LEVELS - 1;
                        push(mq, e);
                        // h, q, a
                } else {