netdev - Re: [PATCH net-next] fq_codel: report congestion notification at enqueue time

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: <1340945592.29822.8.camel@edumazet-glaptop>
Date:	Fri, 29 Jun 2012 06:53:12 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>, Dave Taht <dave.taht@...il.com>,
	codel@...ts.bufferbloat.net, Tom Herbert <therbert@...gle.com>,
	Matt Mathis <mattmathis@...gle.com>,
	Yuchung Cheng <ycheng@...gle.com>,
	Nandita Dukkipati <nanditad@...gle.com>,
	Neal Cardwell <ncardwell@...gle.com>
Subject: Re: [PATCH net-next] fq_codel: report congestion notification at
 enqueue time

On Thu, 2012-06-28 at 19:07 +0200, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> At enqueue time, check sojourn time of packet at head of the queue,
> and return NET_XMIT_CN instead of NET_XMIT_SUCCESS if this sejourn
> time is above codel @target.
> 
> This permits local TCP stack to call tcp_enter_cwr() and reduce its cwnd
> without drops (for example if ECN is not enabled for the flow)
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Dave Taht <dave.taht@...ferbloat.net>
> Cc: Tom Herbert <therbert@...gle.com>
> Cc: Matt Mathis <mattmathis@...gle.com>
> Cc: Yuchung Cheng <ycheng@...gle.com>
> Cc: Nandita Dukkipati <nanditad@...gle.com>
> Cc: Neal Cardwell <ncardwell@...gle.com>
> ---

Please dont apply this patch, I'll submit an updated version later.

Thanks


--
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