On Mon, 2013-05-27 at 10:44 +0300, Eliezer Tamir wrote:
> diff --git a/include/net/sock.h b/include/net/sock.h
> index 66772cf..c7c3ea6 100644
> --- a/include/net/sock.h
> +++ b/include/net/sock.h
> @@ -281,6 +281,7 @@ struct cg_proto;
> * @sk_error_report: callback to indicate errors (e.g. %MSG_ERRQUEUE)
> * @sk_backlog_rcv: callback to process the backlog
> * @sk_destruct: called at sock freeing time, i.e. when all refcnt == 0
> + * @sk_napi_id: id of the last napi context to receive data for sk
> */
> struct sock {
> /*
> @@ -399,6 +400,9 @@ struct sock {
> int (*sk_backlog_rcv)(struct sock *sk,
> struct sk_buff *skb);
> void (*sk_destruct)(struct sock *sk);
> +#ifdef CONFIG_NET_LL_RX_POLL
> + unsigned int sk_napi_id;
> +#endif
> };
I believe this is a bad choice for data locality.
I would rather move it in the same cache line than sk_rxhash
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