From: Mike Snitzer <snitzer@redhat.com>
Date: Fri, 6 Mar 2015 03:21:10 +0000 (-0500)
Subject: dm: reduce the queue delay used in dm_request_fn from 100ms to 10ms
X-Git-Tag: v4.1-rc1~93^2~20
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d548b34b062;p=karo-tx-linux.git

dm: reduce the queue delay used in dm_request_fn from 100ms to 10ms

Commit 7eaceaccab ("block: remove per-queue plugging") didn't justify
DM's use of a 100ms delay; such an extended delay is a liability when
there is reason to re-kick the queue.

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

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 6f854287384b..98eb02d32e6e 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1997,7 +1997,7 @@ static void dm_request_fn(struct request_queue *q)
 	goto out;
 
 delay_and_out:
-	blk_delay_queue(q, HZ / 10);
+	blk_delay_queue(q, HZ / 100);
 out:
 	dm_put_live_table(md, srcu_idx);
 }