Re: [PATCH v5] blk-mq: introduce BLK_STS_DEV_RESOURCE

On Tue, Jan 30 2018 at  2:42pm -0500,
Bart Van Assche [off-list ref] wrote:

On Tue, 2018-01-30 at 14:33 -0500, Mike Snitzer wrote:

quoted

On Tue, Jan 30 2018 at 12:52pm -0500,
Bart Van Assche [off-list ref] wrote:

quoted

- This patch does not fix any bugs nor makes block drivers easier to
  read or to implement. So why is this patch considered useful?

It enables blk-mq core to own the problem that individual drivers should
have no business needing to worry about.  Period.

Thanks for having confirmed that this patch is an API-change only and does
not fix any bugs.

No, it is an API change that enables blk-mq drivers to make forward
progress without compromising the potential benefits associated with
blk-mq's SCHED_RESTART functionality.

(If we're going to beat this horse to death it might as well be with
precision)