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 14:13:35 +0100
From:	Wei Liu <wei.liu2@...rix.com>
To:	Juergen Gross <jgross@...e.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>, Wei Liu <wei.liu2@...rix.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: Re: [PATCH RESEND 1/2] xenbus_client: Extend interface to support
 multi-page ring

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.

Wei.
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