Re: [Xen-devel] [PATCH] xen-netfront: pull on receive skb may need to happen earlier

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 08.07.13 at 14:16, Dion Kant <g.w.kant@xxxxxxxxxx> wrote:
> I was wondering about the following.
> 
> In netif_poll(struct napi_struct *napi, int budget) the skb->cb is assigend,
> but it may be clipped to RX_COPY_THRESHOLD
> 
>               NETFRONT_SKB_CB(skb)->pull_to = rx->status;
>               if (NETFRONT_SKB_CB(skb)->pull_to > RX_COPY_THRESHOLD)
>                     NETFRONT_SKB_CB(skb)->pull_to = RX_COPY_THRESHOLD;
> 
> How does this modification of NETFRONT_SKB_CB(skb)->pull_to propagates
> or is this irrelevant?

I'm not sure I understand what you're asking. pull_to is a private
(to netfront) field used to communicate how much of the skb
needs to be pulled. I don't see how the word "propagate" makes
any sense here, but as said I may simply not be getting what
you're asking about.

Jan


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