tree 21d89ca0af832460d364e6feb72fbf5296edc99b
parent ba155e2d21f6bf05de86a78dbe5bfd8757604a65
author Junichi Nomura <j-nomura@ce.jp.nec.com> 1432628754 +0000
committer Mike Snitzer <snitzer@redhat.com> 1432648656 -0400

dm: run queue on re-queue

Without kicking queue, requeued request may stay forever in
the queue if there are no other I/O activities to the device.

The original error had been in v2.6.39 with commit 7eaceaccab5f
("block: remove per-queue plugging"), which replaced conditional
plugging by periodic runqueue.

Commit 9d1deb83d489 in v4.1-rc1 removed the periodic runqueue
and the problem started to manifest.

Fixes: 9d1deb83d489 ("dm: don't schedule delayed run of the queue if nothing to do")
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>