Re: [Xen-devel] Frag is bigger than frame.

[Wei Liu <liuw@xxxxxxxxx>]

On Thu, Apr 25, 2013 at 4:11 PM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
> On Thu, Apr 25, 2013 at 12:24:22PM +0100, Steven Haigh wrote:
>> Hi all,
>>
>> I've noticed a couple of DomUs have networking freeze with the following
>> getting printed to the Dom0's /var/log/messages:
>>
>> Apr 25 12:09:25 hosting kernel: vif vif-4-0 vif.crc: Frag is bigger than
>> frame.
>> Apr 25 12:09:25 hosting kernel: vif vif-4-0 vif.crc: fatal error;
>> disabling device
>> Apr 25 12:09:25 hosting kernel: br0: port 5(vif.crc) entered disabled state
>>
>> I thought this was something to do with MAX_SKB_FRAGS - however the
>> kernel I use has this increased to 19 - so in theory I shouldn't hit
>> this (as far as I know).
>>
>> Are there any other things that could trigger this?
>>
>
> You're seeing a netfront bug which is fixed in that series. And it is
> not related to MAX_SKB_FRAGS but related to GSO.
>
> Could you try applying my patch set "Bundle fixes for Xen netfront /
> netback" version 7. That series has been applied to DaveM's net-next.
>

BTW with that series you should be able to get rid of the
MAX_SKB_FRAGS -> 19 hack.



Wei.

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