Re: [PATCH v10] virtio-net: add Max MTU configuration field

[Hannes Reinecke <hare@suse.de>]

On 09/13/2016 05:18 PM, Aaron Conole wrote:
> It is helpful for a host to indicate it's MTU to be set on guest NICs
> other than the assumed 1500 byte value.  This helps in situations where
> the host network is using Jumbo Frames, or aiding in PMTU discovery by
> configuring a homogenous network.  It is also helpful for sizing receive
> buffers correctly.
> 
> The change adds a new field to configuration area of network
> devices.  It will be used to pass a maximum MTU from the device to
> the driver.  This will be used by the driver as a maximum value for
> packet sizes during transmission, without segmentation offloading.
> 
> In addition, in order to support backward and forward compatibility,
> we introduce a new feature bit called VIRTIO_NET_F_MTU.
> 
> VIRTIO-152
> Signed-off-by: Aaron Conole <aconole@redhat.com>
> Cc: Victor Kaplansky <victork@redhat.com>
> Acked-by: Michael S. Tsirkin <mst@redhat.com>
> Acked-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
Very good. I'm needing this for my FCoE over virtio work.

Reviewed-by: Hannes Reiencke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
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