block: loop: convert to per-device workqueue

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Documentation/workqueue.txt:
	If there is dependency among multiple work items used
	during memory reclaim, they should be queued to separate
	wq each with WQ_MEM_RECLAIM.

Loop devices can be stacked, so we have to convert to per-device
workqueue. One example is Fedora live CD.

Fixes: b5dd2f6047
Cc: stable@vger.kernel.org (v4.0)
Cc: Justin M. Forbes <jforbes@fedoraproject.org>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>

...

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Ming Lei 2015-05-05 19:49:54 +08:00 • committed by Jens Axboe

parent 9dc6c806b3

commit f4aa4c7bba

2 changed files with 15 additions and 16 deletions

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drivers/block/loop.c

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1

drivers/block/loop.h

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