From: Joe Thornber <ejt@redhat.com>
Date: Thu, 11 May 2017 09:11:06 +0000 (-0400)
Subject: dm cache policy smq: put newly promoted entries at the top of the multiqueue
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4d44ec5ab751be63c5d348f13294304d87baa8c3;p=linux.git

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 5aa8f43856c51..54421a846a0c5 100644
--- 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 {