Re: [Xen-devel] blkif shared ring

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

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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>> 
> 
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