blk-mq-sched: (un)register elevator when (un)registering queue

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I noticed that when booting with a default blk-mq I/O scheduler, the
/sys/block/*/queue/iosched directory was missing. However, switching
after boot did create the directory. This is because we skip the initial
elevator register/unregister when we don't have a ->request_fn(), but we
should still do it for the ->mq_ops case.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

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Omar Sandoval 2017-02-06 12:52:24 -08:00 • committed by Jens Axboe

parent e980f62353

commit 80c6b15732

1 changed files with 10 additions and 11 deletions

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block/blk-sysfs.c

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