[PATCH 1/5] block: don't call blk_mq_delay_run_hw_queue() in case of BLK_STS_RESOURCE

[Mike Snitzer]

On Tue, Sep 19 2017 at 11:52am -0400,
Bart Van Assche <Bart.VanAssche at wdc.com> wrote:

> On Tue, 2017-09-19 at 11:48 -0400, Mike Snitzer wrote:
> > This thread proves that it is definitely brittle to be relying on fixed
> > delays like this:
> > https://patchwork.kernel.org/patch/9703249/
> 
> Hello Mike,
> 
> Sorry but I think that's a misinterpretation of my patch. I came up with that
> patch before I had found and fixed the root cause of the high system load.
> These fixes are upstream (kernel v4.13) which means that that patch is now
> obsolete.

OK, fair point.

Though fixed magic values for delay aren't going to stand the test of
time.