linux-kernel - Re: [PATCH RESEND 1/2] xenbus_client: Extend interface to support multi-page ring

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Date:	Tue, 31 Mar 2015 15:16:33 +0200
From:	Juergen Gross <jgross@...e.com>
To:	Wei Liu <wei.liu2@...rix.com>
CC:	Bob Liu <bob.liu@...cle.com>, xen-devel@...ts.xenproject.org,
	paul.durrant@...rix.com, david.vrabel@...rix.com,
	roger.pau@...rix.com, linux-kernel@...r.kernel.org,
	konrad.wilk@...cle.com,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: Re: [PATCH RESEND 1/2] xenbus_client: Extend interface to support
 multi-page ring

On 03/31/2015 03:13 PM, Wei Liu wrote:
> On Tue, Mar 31, 2015 at 02:36:43PM +0200, Juergen Gross wrote:
>> On 03/31/2015 02:15 PM, Bob Liu wrote:
>>> From: Wei Liu <wei.liu2@...rix.com>
>>>
>>> Originally Xen PV drivers only use single-page ring to pass along
>>> information. This might limit the throughput between frontend and
>>> backend.
>>>
>>> The patch extends Xenbus driver to support multi-page ring, which in
>>> general should improve throughput if ring is the bottleneck. Changes to
>>> various frontend / backend to adapt to the new interface are also
>>> included.
>>>
>>> Affected Xen drivers:
>>> * blkfront/back
>>> * netfront/back
>>> * pcifront/back
>>
>> What about pvscsi drivers?
>> They are affected, too!
>>
>
> When I wrote this patch pvscsi didn't exist upstream.
>
> It would be fairly easy to change that driver too.

Sure. But if you don't do it you'll break the build...


Juergen
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