From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zoltan Kiss Subject: Re: [ovs-dev] [GIT net-next] Open vSwitch Date: Tue, 14 Jan 2014 12:31:06 +0000 Message-ID: <52D52E0A.4050700@citrix.com> References: <1389053776-62865-1-git-send-email-jesse@nicira.com> <52CD657F.7080806@citrix.com> <52D42A9E.1030805@citrix.com> <52D4857C.7020902@citrix.com> <52D50767.6050906@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit Cc: David Miller , "dev@openvswitch.org" , netdev To: Thomas Graf , Jesse Gross Return-path: Received: from smtp.citrix.com ([66.165.176.89]:10652 "EHLO SMTP.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751375AbaANMbJ (ORCPT ); Tue, 14 Jan 2014 07:31:09 -0500 In-Reply-To: <52D50767.6050906@redhat.com> Sender: netdev-owner@vger.kernel.org List-ID: On 14/01/14 09:46, Thomas Graf wrote: > On 01/14/2014 02:30 AM, Jesse Gross wrote: >>> And it works. I guess the last one causing the problem. Might be an >>> important factor, I'm using 32 bit Dom0. >> >> I think you're probably right. Thomas - can you take a look? >> >> We shouldn't be doing any zerocopy in this situation but it looks to >> me like we don't do any padding at all, even in situations where we >> are copying the data. > > I'm looking into this now. The zerocopy method should only be attempted > if user space has announced the ability to received unaligned messages. > > @Zoltan: I assume you are using an unmodified OVS 1.9.3? > Well, there are a few changes, but none of them seems to be significant. Most of them are just making OVS work with our build system. Here is the patchqueue: https://github.com/xenserver/openvswitch.pg/tree/master/master See the series file for the order of the patches. Zoli