The patch below does not apply to the 4.9-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 d4acf3650c7c968f46ad932b9a25d1cc24cf4998 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bart.vanassche@xxxxxxx>
Date: Wed, 9 Aug 2017 11:28:06 -0700
Subject: [PATCH] block: Make blk_mq_delay_kick_requeue_list() rerun the queue
at a quiet time
The blk_mq_delay_kick_requeue_list() function is used by the device
mapper and only by the device mapper to rerun the queue and requeue
list after a delay. This function is called once per request that
gets requeued. Modify this function such that the queue is run once
per path change event instead of once per request that is requeued.
Fixes: commit 2849450ad39d ("blk-mq: introduce blk_mq_delay_kick_requeue_list()")
Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxx>
Cc: Mike Snitzer <snitzer@xxxxxxxxxx>
Cc: Laurence Oberman <loberman@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 211ef367345f..535cbdf32aab 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -684,8 +684,8 @@ EXPORT_SYMBOL(blk_mq_kick_requeue_list);
void blk_mq_delay_kick_requeue_list(struct request_queue *q,
unsigned long msecs)
{
- kblockd_schedule_delayed_work(&q->requeue_work,
- msecs_to_jiffies(msecs));
+ kblockd_mod_delayed_work_on(WORK_CPU_UNBOUND, &q->requeue_work,
+ msecs_to_jiffies(msecs));
}
EXPORT_SYMBOL(blk_mq_delay_kick_requeue_list);