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xen-devel
Re: [Xen-devel] blkif shared ring
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To: |
Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> |
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Subject: |
Re: [Xen-devel] blkif shared ring |
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From: |
Paul Durrant <paul.durrant@xxxxxxxxxx> |
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Date: |
Tue, 11 Aug 2009 10:10:53 +0100 |
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Cc: |
Dutch Meyer <dmeyer@xxxxxxxxx>, Geoffrey Lefebvre <geoffrey@xxxxxxxxx>, "dean.samuels@xxxxxxxxxx" <dean.samuels@xxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Samvel Yuri <samvelox@xxxxxxxxx>, Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>, Andrew Warfield <andy@xxxxxxxxx> |
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Tue, 11 Aug 2009 02:11:21 -0700 |
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I have a blkback patch that could be upstreamed. I'll put together a
blkfront patch and post them together.
Paul
Keir Fraser wrote:
They did not.
-- Keir
On 11/08/2009 00:20, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:
Hi Geoff, et al --
Did these blkfront/blkback multi-page patches
ever make it upstream?
Thanks,
Dan
-----Original Message-----
From: Geoffrey Lefebvre [mailto:geoffrey@xxxxxxxxx]
Sent: Wednesday, November 19, 2008 9:57 PM
To: Samvel Yuri
Cc: Dutch Meyer; Samuel Thibault; xen-devel; Andrew Warfield
Subject: Re: [Xen-devel] blkif shared ring
On Tue, Nov 18, 2008 at 6:02 PM, Samvel Yuri
<samvelox@xxxxxxxxx> wrote:
hello Geoffrey-
Ahh, so Parallax project just do multi-page ring (and not
entirely another
set of shared ring).
Yes that's correct. We added a page to the existing ring.
am going to try 4 * PAGE_SIZE and see whether the box stays
alive. Were the
In our case going to a 4 pages ring didn't buy any additional
performance. With 2 pages we were pretty close to saturating the
gigabit link to the filer.
patches self
contained in blkfront & blkback? If possible a pointer to
blkfront & blkback
will be useful.
The patches for blkfront and back were pretty self contained. Blktap
was a bit more spread out because it changed user space code as well.
For blkfront/back, the most significant changes were to the ring setup
protocol to pass more than one grant reference. I might have time to
refresh the patches and post them to the list next week if that is of
interest to anyone.
cheers,
geoffrey
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--
===============================
Paul Durrant, Software Engineer
Citrix Systems (R&D) Ltd.
First Floor, Building 101
Cambridge Science Park
Milton Road
Cambridge CB4 0FY
United Kingdom
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