Re: [PATCH] block: revert pushing the final release of request_queue to a workqueue.

[Ming Lei]

On Fri, Feb 07, 2020 at 08:24:59PM +0800, yukuai (C) wrote:
> On 2020/2/7 18:26, yukuai (C) wrote:
> > The reason of the problem is because the final release of request_queue
> > may be called after loop_remove() returns.
> 
> The description is not accurate. The reason of the problem is that
> __blk_trace_setup() called before the final release of request_queue
> returns.(step 4 before step 5)

But blk_mq_debugfs_register() in your step 3 for adding loop still may
fail, that is why I suggest to consider to move
blk_mq_debugfs_register() into blk_unregister_queue().


Thanks,
Ming