Re: [Xen-devel] Network drop on domU (netfront: rx->offset: 0, size: 4294967295)

[Boris Derzhavets <bderzhavets@xxxxxxxxx>]

Not sure, it will help :-

http://hightechsorcery.com/2008/03/virtualization-tip-always-disable-checksumming-virtual-ethernet-devices

Personally , i used to manage this way.

Boris.

--- On Fri, 5/29/09, M A Young <m.a.young@xxxxxxxxxxxx> wrote:

From: M A Young <m.a.young@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Network drop on domU (netfront: rx->offset: 0, size: 4294967295)
To: "Dennis Krul" <dweazle@xxxxxxxxx>
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Date: Friday, May 29, 2009, 11:13 AM

On Fri, 29 May 2009, M A Young wrote:

> On Fri, 29 May 2009, Dennis Krul wrote:
>
>> We've encountered the same problem. (We're using your packages btw, thanks
>> for publishing them ;)
>>
>> For what it's worth, you can work around the speed issue by disabling TCP
>> segmentation offloading (ethtool -K ethX tso off).
>> (You should disable it in your dom0 on all interfaces and in the domU as
>> well.)
>>
>> Unfortunately there is no apparent way to disable tso when kickstarting a
>> domU, but other than that the speeds are back to normal.
>
> Thanks for that, it fixes my problem as well.

Actually, I spoke too soon, the problems are still there (I think I was
fooled by a quiet period straight after applying the changes).

    Michael Young

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