netdev - Re: [RFC PATCH net-next-2.6] gro: drivers should feed GRO only with TCP packets

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20100901104235.5476a242@nehalam>
Date:	Wed, 1 Sep 2010 10:42:35 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>, netdev <netdev@...r.kernel.org>
Subject: Re: [RFC PATCH net-next-2.6] gro: drivers should feed GRO only with
 TCP packets

On Wed, 01 Sep 2010 19:04:46 +0200
Eric Dumazet <eric.dumazet@...il.com> wrote:

> Many network devices can tell if an incoming frame is a TCP one for a
> small cost.
> 
> Instead of feeding GRO with all packets, we could filter packets on this
> information ?
> 
> This should help machines handling a mixed UDP/TCP workload, keeping gro
> overhead as small as possible.
> 
> patch against tg3 as an example...
> 
> Alternative would be to set a bit "is_tcp" on napi_struct to let this
> choice being done in network stack, not by each driver. 
> 
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

There was talk of doing GRO for UDP as well bug it never
got implemented. 


-- 
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html