blk-mq: clarify dispatch may not be drained/blocked by stopping queue

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BLK_MQ_S_STOPPED may not be observed in other concurrent I/O paths,
we can't guarantee that dispatching won't happen after returning
from the APIs of stopping queue.

So clarify the fact and avoid potential misuse.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Ming Lei 2017-06-06 23:22:09 +08:00 • committed by Jens Axboe

parent 1d9e9bc6b5

commit 39a70c76b8

1 changed files with 18 additions and 0 deletions

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block/blk-mq.c

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