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Date: Thu, 19 Dec 2013 09:19:50 +0100
From: =?ISO-8859-1?Q?Roger_Pau_Monn=E9?= <roger.pau@citrix.com>
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To: Mike C. <miguelmclara@gmail.com>, <freebsd-xen@freebsd.org>
Subject: Re: Panic with FreeBSD 10 RC2 on Netbsd Xen dom0
References: <20131218001615.GA10501@moore.morphism.de>
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On 19/12/13 02:38, Mike C. wrote:
> I've reported this to xen-devel I while ago.
> 
> 
> It worked in the first FreeBSD-10 current releases but them it stoped, I
> believe a previous issue was re-introduced somehow!
> 
> NetBSD Xen backend does not support TSO/GSO at all, there was a very
> similar problem in FreeBSD 9 a while a go, and my guess is that the code
> tried to use TSO again, and leads to problems if the Dom0 is NetBSD.
> 
> 
> Also more recently I had problems with Windows GPLPV drivers, and the
> dev tracked the issue to the same.. however in windows DomU's if I
> disabled TSO it would work.
> In FreeBSD at least until Aplha 5, I tried to disable TSO but it still
> wouldn't work.

By looking at relevant commits in netfront, could you try to revert
r251297 and see if that solves the problem? Also, doing a bisect of the
commits in netfront would be very helpful in order to identify the issue.

Roger.