Re: [PATCH 4/5] blk-mq-debugfs: Show busy requests

Bart Van Assche
2017-05-30T17:29:25Z

On Sat, 2017-05-27 at 11:16 +0800, Ming Lei wrote:
> What is the real motivation for this debug interface, could Bart explain
> a bit?

As mentioned in the description of this patch, the purpose of this patch
is to allow anyone who is working on a block driver to figure out whether
or not a request got stuck in a block driver. This means that .queue_rq()
got called for a request but the block driver did not trigger a call to
.end_io().

Bart.=