From: Jens Axboe <axboe@suse.de>
To: Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk>
Cc: Xen development list <xen-devel@lists.xensource.com>,
Kurt Garloff <garloff@suse.de>, Philip R Auld <pauld@egenera.com>,
Vincent Hanquez <tab@snarc.org>,
Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Subject: Re: poor domU VBD performance.
Date: Thu, 31 Mar 2005 20:04:02 +0200 [thread overview]
Message-ID: <20050331180402.GU9204@suse.de> (raw)
In-Reply-To: <A95E2296287EAD4EB592B5DEEFCE0E9D1E3975@liverpoolst.ad.cl.cam.ac.uk>
On Thu, Mar 31 2005, Ian Pratt wrote:
>
> > > I've checked in something along the lines of what you
> > described into
> > > both the 2.0-testing and the unstable trees. Looks to have
> > identical
> > > performance to the original simple patch, at least for a bulk 'dd'.
> >
> > Can you post the patch here for review? Or just point me
> > somewhere I can view it.
>
> Jens,
>
> Thanks for your help on this.
>
> Here's Keirs updated patch:
> http://xen.bkbits.net:8080/xen-2.0-testing.bk/gnupatch@424c1abd7LgWMiask
> LEEAAX7ffdkXQ
>
> Which is based on this earlier patch from you:
> http://xen.bkbits.net:8080/xen-2.0-testing.bk/gnupatch@424bba4091aV1FuNk
> sY_4w_z4Tvr3g
I cannot immediately see if you call bdev_put() right after queueing the
io? If so, I think the patch looks fine. If not, you are missing the
last unplug :-)
--
Jens Axboe
next prev parent reply other threads:[~2005-03-31 18:04 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-31 17:55 poor domU VBD performance Ian Pratt
2005-03-31 18:04 ` Jens Axboe [this message]
2005-03-31 18:57 ` Keir Fraser
2005-03-31 19:22 ` Jens Axboe
2005-03-31 20:49 ` Andrew Theurer
2005-03-31 21:15 ` Keir Fraser
2005-03-31 21:27 ` Andrew Theurer
2005-04-01 5:43 ` Jens Axboe
2005-04-01 16:36 ` peter bier
-- strict thread matches above, loose matches on Subject: below --
2005-04-04 19:36 Ian Pratt
2005-04-04 22:35 ` Nicholas Lee
2005-04-12 10:29 ` peter bier
2005-04-02 10:56 Ian Pratt
2005-04-02 12:10 ` Cédric Schieli
2005-04-01 23:22 Ian Pratt
2005-04-02 10:36 ` Cédric Schieli
2005-04-02 19:54 ` peter bier
2005-03-31 22:36 Ian Pratt
2005-03-31 23:05 ` Andrew Theurer
2005-04-01 21:40 ` Cédric Schieli
2005-03-31 21:32 Ian Pratt
2005-03-31 22:13 ` Andrew Theurer
2005-03-30 11:16 RE: " Ian Pratt
2005-03-30 17:01 ` peter bier
2005-03-31 7:05 ` RE: " Jens Axboe
2005-03-31 7:10 ` Jens Axboe
2005-03-31 8:17 ` Keir Fraser
2005-03-31 8:19 ` Jens Axboe
2005-03-31 14:33 ` Philip R Auld
2005-03-31 15:34 ` Kurt Garloff
2005-03-31 15:39 ` Jens Axboe
2005-03-31 15:41 ` Jens Axboe
2005-03-31 16:27 ` Nivedita Singhvi
2005-03-31 17:43 ` Jens Axboe
2005-03-31 18:27 ` Kurt Garloff
2005-03-31 21:59 ` Nivedita Singhvi
2005-03-31 15:49 ` Keir Fraser
2005-03-31 16:02 ` Andrew Theurer
2005-03-31 17:44 ` Jens Axboe
2005-03-31 16:55 ` Philip R Auld
2005-03-31 16:53 ` Philip R Auld
2005-03-31 18:01 ` Jens Axboe
2005-03-31 18:43 ` Philip R Auld
2005-03-31 19:07 ` Keir Fraser
2005-03-31 19:10 ` Keir Fraser
2005-03-31 19:20 ` Jens Axboe
2005-03-31 19:21 ` Jens Axboe
[not found] <A95E2296287EAD4EB592B5DEEFCE0E9D1E3905@liverpoolst.ad.cl.cam.ac.uk>
2005-03-29 22:45 ` RE: " Kurt Garloff
2005-03-29 22:59 ` Andrew Theurer
2005-03-29 23:19 ` Kurt Garloff
2005-03-29 23:26 ` Andrew Theurer
2005-03-29 14:19 Ian Pratt
2005-03-29 15:27 ` peter bier
2005-03-28 22:17 Ian Pratt
2005-03-29 8:44 ` peter bier
2005-03-28 20:14 Ian Pratt
2005-03-28 20:18 ` Andrew Theurer
2005-03-28 21:48 ` Andrew Theurer
2005-03-28 23:38 ` Peter Bier
2005-03-29 0:27 ` Andrew Theurer
2005-03-29 11:39 ` peter bier
2005-03-28 18:55 Ian Pratt
2005-03-28 19:33 ` Andrew Theurer
2005-03-27 17:41 Ian Pratt
2005-03-28 8:48 ` peter bier
2005-03-28 12:44 ` peter bier
2005-03-29 6:20 ` Pasi Kärkkäinen
2005-03-26 18:14 Peter Bier
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