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block: simplify disk shutdown

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Set the queue dying flag and call blk_mq_exit_queue from del_gendisk for
all disks that do not have separately allocated queues, and thus remove
the need to call blk_cleanup_queue for them.

Rename blk_cleanup_disk to blk_mq_destroy_queue to make it clear that
this function is intended only for separately allocated blk-mq queues.

This saves an extra queue freeze for devices without a separately
allocated queue.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20220619060552.1850436-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2022-06-19 08:05:51 +02:00
committed by Jens Axboe
parent 0e3534022f
commit 6f8191fdf4
34 changed files with 105 additions and 113 deletions
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5
block/blk-sysfs.c
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@@ -755,11 +755,6 @@ static void blk_free_queue_rcu(struct rcu_head *rcu_head)
* decremented with blk_put_queue(). Once the refcount reaches 0 this function
* is called.
*
* For drivers that have a request_queue on a gendisk and added with
* __device_add_disk() the refcount to request_queue will reach 0 with
* the last put_disk() called by the driver. For drivers which don't use
* __device_add_disk() this happens with blk_cleanup_queue().
*
* Drivers exist which depend on the release of the request_queue to be
* synchronous, it should not be deferred.
*