Subject: Re: [Xen-devel] [PATCH net-next] xen-netfront: convert to GRO API and advertise this feature

From: Jason Wang <[email-masked]>
Date: Sun, 22 Sep 2013 14:29:15 +0800

On 09/22/2013 12:05 AM, Wei Liu wrote:
> Anirban was seeing netfront received MTU size packets, which downgraded
> throughput. The following patch makes netfront use GRO API which
> improves throughput for that case.
>
> Signed-off-by: Wei Liu <[email-masked]>
> Signed-off-by: Anirban Chakraborty <[email-masked]>
> Cc: Ian Campbell <[email-masked]>

Maybe a dumb question: doesn't Xen depends on the driver of host card to
do GRO and pass it to netfront? What the case that netfront can receive
a MTU size packet, for a card that does not support GRO in host? Doing
GRO twice may introduce extra overheads.

Thanks