From: Mike Snitzer <snitzer@redhat.com>
To: Keith Busch <keith.busch@intel.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Jun'ichi Nomura <j-nomura@ce.jp.nec.com>,
dm-devel@redhat.com
Subject: Re: dm-mpath: Work with blk multi-queue drivers
Date: Wed, 24 Sep 2014 20:13:41 -0400 [thread overview]
Message-ID: <20140925001341.GA25145@redhat.com> (raw)
In-Reply-To: <20140924184834.GB23052@redhat.com>
On Wed, Sep 24 2014 at 2:48pm -0400,
Mike Snitzer <snitzer@redhat.com> wrote:
> On Wed, Sep 24 2014 at 2:34pm -0400,
> Mike Snitzer <snitzer@redhat.com> wrote:
>
> >
> > I never did take the time to properly review Hannes' proposal but now
> > that you're floating this blk-mq support for DM core (and DM mpath) I'm
> > clearly going to have to take this all on in a much more focused way.
> >
> > Christoph/Hannes/Junichi/Keith/others, can you see a way forward that
> > offers a lighter request-based DM that makes required callouts to (new?)
> > block interfaces that helps us abstract the old request and blk-mq
> > request allocation, etc?
>
> (sorry about replying to myself...)
>
> SO revisiting that thread from above, these posts stand out:
> http://www.redhat.com/archives/dm-devel/2014-June/msg00026.html
> http://www.redhat.com/archives/dm-devel/2014-June/msg00028.html
>
> I'd love to see us get rid of request-based DM's bio cloning for each
> cloned request (we never did get an answer from the NEC guys to know
> _why_ that was done).
Actually, Junichi did respond with why:
http://www.redhat.com/archives/dm-devel/2014-June/msg00033.html
So this needs more review and thought.
next prev parent reply other threads:[~2014-09-25 0:13 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-23 17:03 [PATCH] dm-mpath: Work with blk multi-queue drivers Keith Busch
2014-09-24 9:02 ` Hannes Reinecke
2014-09-24 14:27 ` Christoph Hellwig
2014-09-24 14:52 ` Christoph Hellwig
2014-09-24 17:20 ` Keith Busch
2014-09-24 18:34 ` Mike Snitzer
2014-09-24 18:48 ` Mike Snitzer
2014-09-25 0:13 ` Mike Snitzer [this message]
2014-09-25 15:57 ` Keith Busch
2014-09-25 16:08 ` Christoph Hellwig
2014-09-25 16:12 ` Mike Snitzer
2014-09-29 23:58 ` Junichi Nomura
2014-09-30 14:18 ` Mike Snitzer
2014-09-30 23:43 ` Junichi Nomura
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