[ovs-discuss] discuss Digest, Vol 30, Issue 5

[Jesse Gross]

2011/12/19 likunyun <kunyunli at hotmail.com>:
> In the kernel, Xen's checksum fields are defined in sk_buff, and CONFIG_XEN
> is defined in .config.
> They are  used in many place , like in the front of dev_queue_xmit():
> ... ...
> if (!skb->proto_csum_blank)
>   return 0;
>
> skb_checksum_setup()
> ...
>
> Kernel is is using the xen model.

It sounds like it is using a hybrid, where it gets the checksum type
from those fields but uses the newer style offsets.  Currently, usage
of those is linked together in the OVS compatibility code, apparently
they need to be broken apart.