From: Joe Thornber <ejt@redhat.com>
Date: Thu, 11 May 2017 09:09:38 +0000 (-0400)
Subject: dm cache policy smq: be more aggressive about triggering a writeback
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=78c45607b909fb384c47c134d89b39285a6a8b45;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

dm cache policy smq: be more aggressive about triggering a writeback

If there are no clean entries to demote we really want to writeback
immediately.

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 a177559f2049..5aa8f43856c5 100644
--- a/drivers/md/dm-cache-policy-smq.c
+++ b/drivers/md/dm-cache-policy-smq.c
@@ -1192,7 +1192,7 @@ 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, false))
+		if (!clean_target_met(mq, true))
 			queue_writeback(mq);
 		return;
 	}