netdev - Re: [BUG,REGRESSION?] 3.11.6+,3.12: GbE iface rate drops to few KB/s

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Message-ID: <20131120095037.07dc6fc0@skate>
Date:	Wed, 20 Nov 2013 09:50:37 +0100
From:	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
To:	arno@...isbad.org (Arnaud Ebalard)
Cc:	Willy Tarreau <w@....eu>, Eric Dumazet <eric.dumazet@...il.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	simon.guinot@...uanux.org, netdev@...r.kernel.org,
	edumazet@...gle.com, Cong Wang <xiyou.wangcong@...il.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [BUG,REGRESSION?] 3.11.6+,3.12: GbE iface rate drops to few
 KB/s

Arnaud,

On Wed, 20 Nov 2013 00:53:43 +0100, Arnaud Ebalard wrote:

>  - It seems I will I have to spend some time on the SATA issues I
>    previously thought were an artefact of not cleaning my tree during a
>    debug session [1], i.e. there is IMHO an issue.

I don't remember in detail what your SATA problem was, but just to let
you know that we are currently debugging a problem that occurs on
Armada XP (more than one core is needed for the problem to occur), with
SATA (the symptom is that after some time of SATA usage, SATA traffic is
stalled, and no SATA interrupts are generated anymore). We're still
working on this one, and trying to figure out where the problem is.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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