From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andres Lagar Cavilla <andreslc@cs.toronto.edu>
Subject: Re: [Xen-devel] Network freezing for paravirt linux,
	3.0.3
Date: Tue, 28 Nov 2006 12:34:45 -0500
Message-ID: <456C7335.4050905@cs.toronto.edu>
References: <C1920569.52AE%keir@xensource.com>
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To: Keir Fraser <keir@xensource.com>
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Patching the tx_add_credit function worked like a charm.
Thanks a lot!

Andres

Keir Fraser wrote:

>On 28/11/06 15:08, "Andres Lagar Cavilla" <andreslc@cs.toronto.edu> wrote:
>
>  
>
>>It thus looks like the culprit is netfront, or possibly a
>>netback/netfront interaction (Q: is netback employed in the qemu-dm
>>emulation path, or packets are simply relayed from the tap to vifX.Y?).
>>I would love to provide more information, but I'm unsure where to get it.
>>    
>>
>
>What version of netback are you running? The one from the 3.0.3 release is
>known to have a bug which would cause high-bandwidth transfers to stall.
>
>The offending function is netback.c:tx_add_credit(). You should be able to
>take the version from xen-unstable and copy it into whatever version of
>netback.c you are using.
>
> -- Keir
>
>  
>