[Xen-devel] Re: [NET] front: Fix features on resume when csum is off

[Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>]

On Wed, Aug 16, 2006 at 11:04:25PM +1000, herbert wrote:
> On Wed, Aug 16, 2006 at 02:00:02PM +0100, Keir Fraser wrote:
> > 
> > This seems a bit odd. Shouldn't it be up to the network stack to not use
> > SG/TSO if it can't use them with a non-checksumming interface? What is the
> > failure mode currently?

I forgot to answer the second part of your question :)

1) Turn off TX checksum with ethtool in domU.
2) Suspend domU.
3) Resume domU.

If you run ethtool now you'll see that TX checksum is off while SG/TSO
is on.  If you send anything out bigger than one MTU through TCP it'll
get dropped.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx>
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