From: Stephen Hemminger <shemminger@vyatta.com>
To: Tom Herbert <therbert@google.com>
Cc: netdev@vger.kernel.org, David Miller <davem@davemloft.net>
Subject: Re: [PATCH] Software receive packet steering
Date: Wed, 8 Apr 2009 16:08:42 -0700 [thread overview]
Message-ID: <20090408160842.6c2b1983@s6510> (raw)
In-Reply-To: <65634d660904081548g7ea3e3bfn858f2336db9a671f@mail.gmail.com>
On Wed, 8 Apr 2009 15:48:12 -0700
Tom Herbert <therbert@google.com> wrote:
> if (skb->protocol == __constant_htons(ETH_P_IP)) {
> + struct iphdr *iph = (struct iphdr *)skb->data;
> + __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
> +
> + hash = 0;
> + if (!(iph->frag_off &
> + __constant_htons(IP_MF|IP_OFFSET)) &&
> + ((iph->protocol == IPPROTO_TCP) ||
> + (iph->protocol == IPPROTO_UDP)))
> + hash = ntohs(*layer4hdr ^ *(layer4hdr + 1));
> +
> + hash ^= (ntohl(iph->saddr ^ iph->daddr)) & 0xffff;
> + goto got_hash;
The hash could should be same as existing Tx hash?
What about using hardware RSS values?
next prev parent reply other threads:[~2009-04-08 23:09 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-08 22:48 [PATCH] Software receive packet steering Tom Herbert
2009-04-08 23:08 ` Stephen Hemminger [this message]
2009-04-08 23:09 ` Stephen Hemminger
2009-04-08 23:15 ` David Miller
2009-04-09 16:43 ` Tom Herbert
2009-04-09 18:23 ` Ben Hutchings
2009-04-09 21:17 ` David Miller
2009-04-09 0:36 ` David Miller
2009-04-09 4:40 ` Tom Herbert
2009-04-09 5:24 ` David Miller
2009-04-20 10:32 ` Andi Kleen
2009-04-20 10:46 ` David Miller
2009-04-21 3:26 ` Tom Herbert
2009-04-21 9:48 ` Eric Dumazet
2009-04-21 15:46 ` Stephen Hemminger
2009-04-21 18:52 ` Tom Herbert
2009-04-22 9:21 ` David Miller
2009-04-22 15:46 ` Tom Herbert
2009-04-22 18:49 ` Rick Jones
2009-04-22 20:44 ` Jesper Dangaard Brouer
2009-04-23 6:58 ` Jens Axboe
2009-04-23 7:25 ` David Miller
2009-04-23 7:29 ` Jens Axboe
2009-04-23 9:12 ` Jens Laas
2009-04-22 14:33 ` Martin Josefsson
2009-04-23 7:34 ` David Miller
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