The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From bd9f55ea1cf6e14eb054b06ea877d2d1fa339514 Mon Sep 17 00:00:00 2001
From: Tahsin Erdogan <tahsin@xxxxxxxxxx>
Date: Fri, 15 Jul 2016 06:27:08 -0700
Subject: [PATCH] dm: fix second blk_delay_queue() parameter to be in msec
units not jiffies
Commit d548b34b062 ("dm: reduce the queue delay used in dm_request_fn
from 100ms to 10ms") always intended the value to be 10 msecs -- it
just expressed it in jiffies because earlier commit 7eaceaccab ("block:
remove per-queue plugging") did.
Signed-off-by: Tahsin Erdogan <tahsin@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Fixes: d548b34b062 ("dm: reduce the queue delay used in dm_request_fn from 100ms to 10ms")
Cc: stable@xxxxxxxxxxxxxxx # 4.1+ -- stable@ backports must be applied to drivers/md/dm.c
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index aa81539374a6..7a9661868496 100644
--- a/drivers/md/dm-rq.c
+++ b/drivers/md/dm-rq.c
@@ -785,7 +785,7 @@ static void dm_old_request_fn(struct request_queue *q)
md_in_flight(md) && rq->bio && rq->bio->bi_vcnt == 1 &&
md->last_rq_pos == pos && md->last_rq_rw == rq_data_dir(rq)) ||
(ti->type->busy && ti->type->busy(ti))) {
- blk_delay_queue(q, HZ / 100);
+ blk_delay_queue(q, 10);
return;
}
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