netdev - Re: [PATCH] net_sched: fix ip

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Message-Id: <20110315.185424.193707215.davem@davemloft.net>
Date:	Tue, 15 Mar 2011 18:54:24 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	chromatix99@...il.com, d@...t.net, netdev@...r.kernel.org,
	dan@...erfire.com
Subject: Re: [PATCH] net_sched: fix ip_tos2prio

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Wed, 16 Mar 2011 00:56:07 +0100

> From: Dan Siemon <dan@...erfire.com>
> 
> ECN support incorrectly maps ECN BESTEFFORT packets to TC_PRIO_FILLER
> (1) instead of TC_PRIO_BESTEFFORT (0)
> 
> This means ECN enabled flows are placed in pfifo_fast/prio low priority
> band, giving ECN enabled flows [ECT(0) and CE codepoints] higher drop
> probabilities.
> 
> This is rather unfortunate, given we would like ECN being more widely
> used.
> 
> Ref : http://www.coverfire.com/archives/2011/03/13/pfifo_fast-and-ecn/
> 
> Signed-off-by: Dan Siemon <dan@...erfire.com>
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
> Cc: Dave Täht <d@...t.net>
> Cc: Jonathan Morton <chromatix99@...il.com>

Applied and queued up for -stable, thanks.
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