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

[Jason Wang <jasowang@xxxxxxxxxx>]

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 <wei.liu2@xxxxxxxxxx>
> Signed-off-by: Anirban Chakraborty <abchak@xxxxxxxxxxx>
> Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>

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

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