[dm-devel] [PATCH V3 0/3] block/dm: support bio polling

[Mike Snitzer]

On Mon, Feb 28 2022 at  7:58P -0500,
Ming Lei <ming.lei at redhat.com> wrote:

> On Mon, Feb 28, 2022 at 11:27:44AM -0500, Mike Snitzer wrote:
> > 
> > Hey Ming,
> > 
> > I'd like us to follow-through with adding bio-based polling support.
> > Kind of strange none of us that were sent this V3 ever responded,
> > sorry about that!
> > 
> > Do you have interest in rebasing this patchset (against linux-dm.git's
> > "dm-5.18" branch since there has been quite some churn)?  Or are you
> > OK with me doing the rebase?
> 
> Hi Mike,
> 
> Actually I have one local v5.17 rebase:
> 
> https://github.com/ming1/linux/tree/my_v5.17-dm-io-poll
> 
> Also one for-5.18/block rebase which is done just now:
> 
> https://github.com/ming1/linux/tree/my_v5.18-dm-bio-poll
> 
> In my previous test on v5.17 rebase, the IOPS improvement is a bit small,
> so I didn't post it out. Recently not get time to investigate
> the performance further, so please feel free to work on it.

OK, I've rebased it on dm-5.18.

Can you please share the exact test(s) you were running?  I assume you
were running directly against a request-based device and then
comparing polling perf through dm-linear to the same underlying
request-based device?

Thanks,
Mike