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Re: [Xen-devel] [RFC PATCH 34/35] Add the Xen virtual network device dri

On 10 May 2006, at 00:51, Chris Wright wrote:

* Herbert Xu (herbert@xxxxxxxxxxxxxxxxxxx) wrote:
Chris Wright <chrisw@xxxxxxxxxxxx> wrote:

+       netdev->features        = NETIF_F_IP_CSUM;

Any reason why IP_CSUM was chosen instead of HW_CSUM? Doing the latter
would seem to be in fact easier for a virtual driver, no?

That, I really don't know.

Checksum offload was added late to the virtual transport and currently not enough info is carried to identify protocol checksum fields in arbitrary locations. When we rev the virtual interface, and include a proper checksum-offset field, we'll be able to switch to NETIF_F_HW_CSUM.

 -- Keir

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