netdev - Re: [PATCH net-next] net: Add low-latency/polling support for UDP multicast

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Message-ID: <5200A203.2090306@linux.intel.com>
Date:	Tue, 06 Aug 2013 10:13:07 +0300
From:	Eliezer Tamir <eliezer.tamir@...ux.intel.com>
To:	Shawn Bohrer <sbohrer@...advisors.com>
CC:	davem@...emloft.net, netdev@...r.kernel.org,
	Amir Vadai <amirv@...lanox.com>, tomk@...advisors.com
Subject: Re: [PATCH net-next] net: Add low-latency/polling support for UDP
 multicast

On 06/08/2013 01:16, Shawn Bohrer wrote:
> Set the napi id for each socket in the multicast path to enable
> low-latency/polling support.
> 
> Signed-off-by: Shawn Bohrer <sbohrer@...advisors.com>
> ---
>  net/ipv4/udp.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
> index 766e6ba..0d0da17 100644
> --- a/net/ipv4/udp.c
> +++ b/net/ipv4/udp.c
> @@ -1596,6 +1596,7 @@ static int __udp4_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
>  	dif = skb->dev->ifindex;
>  	sk = udp_v4_mcast_next(net, sk, uh->dest, daddr, uh->source, saddr, dif);
>  	while (sk) {
> +		sk_mark_napi_id(sk, skb);
>  		stack[count++] = sk;
>  		sk = udp_v4_mcast_next(net, sk_nulls_next(sk), uh->dest,
>  				       daddr, uh->source, saddr, dif);
> 

Looks OK.
To be complete, you want to do the same for __udp6_lib_mcast_deliver().

-Eliezer
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