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Re: [Xen-devel] [PATCH net-next v4 2/5] xen-netback: add support for IPv6 checksum offload from guest

On Fri, Oct 11, 2013 at 04:06:19PM +0100, Paul Durrant wrote:
> -/*
> - * This is the amount of packet we copy rather than map, so that the
> - * guest can't fiddle with the contents of the headers while we do
> - * packet processing on them (netfilter, routing, etc).
> +/* This is a miniumum size for the linear area to avoid lots of
> + * calls to __pskb_pull_tail() as we set up checksum offsets.
>   */

You seem to forget to explain why 128 is chosen. :-)


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