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H A D | dm.c | diff 4ae9944d132b160d444fa3aa875307eb0fa3eeec Tue May 26 03:25:54 CDT 2015 Junichi Nomura <j-nomura@ce.jp.nec.com> 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>
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