netdev - Re: [ovs-dev] [GIT net-next] Open vSwitch

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Message-ID: <52D50767.6050906@redhat.com>
Date:	Tue, 14 Jan 2014 10:46:15 +0100
From:	Thomas Graf <tgraf@...hat.com>
To:	Jesse Gross <jesse@...ira.com>,
	Zoltan Kiss <zoltan.kiss@...rix.com>
CC:	David Miller <davem@...emloft.net>,
	"dev@...nvswitch.org" <dev@...nvswitch.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [ovs-dev] [GIT net-next] Open vSwitch

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?

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