From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754597AbbCaNQh (ORCPT ); Tue, 31 Mar 2015 09:16:37 -0400 Received: from cantor2.suse.de ([195.135.220.15]:42653 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753353AbbCaNQf (ORCPT ); Tue, 31 Mar 2015 09:16:35 -0400 Message-ID: <551A9E31.2030304@suse.com> Date: Tue, 31 Mar 2015 15:16:33 +0200 From: Juergen Gross User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 MIME-Version: 1.0 To: Wei Liu CC: Bob Liu , xen-devel@lists.xenproject.org, paul.durrant@citrix.com, david.vrabel@citrix.com, roger.pau@citrix.com, linux-kernel@vger.kernel.org, konrad.wilk@oracle.com, Boris Ostrovsky Subject: Re: [PATCH RESEND 1/2] xenbus_client: Extend interface to support multi-page ring References: <1427804127-11372-1-git-send-email-bob.liu@oracle.com> <551A94DB.9020708@suse.com> <20150331131335.GC14300@zion.uk.xensource.com> In-Reply-To: <20150331131335.GC14300@zion.uk.xensource.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 >>> >>> 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