Re: [RFC v2 5/5] block: revert back to synchronous request_queue removal

[Luis Chamberlain]

On Fri, Apr 10, 2020 at 8:34 AM Luis Chamberlain <mcgrof@xxxxxxxxxx> wrote:
> On Thu, Apr 09, 2020 at 08:12:21PM -0700, Bart Van Assche wrote:
> > Please add a might_sleep() call in blk_put_queue() since with this patch
> > applied it is no longer allowed to call blk_put_queue() from atomic context.
>
> Sure thing.

On second though, I don't think blk_put_queue() would be the right
place for might_sleep(), given we really only care about the *last*
refcount decrement to 0. So I'll move it to blk_release_queue().
Granted, at that point we are too late, and we'd get a splat about
this issue *iff* we really sleep. So yeah, I do suppose that forcing
this check there still makes sense.

  Luis