netdev - Re: [PATCH v4] net/hsr: Add support for the High-availability Seamless Redundancy protocol (HSRv0)

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Message-ID: <523CF077.8010607@xdin.com>
Date:	Sat, 21 Sep 2013 03:03:51 +0200
From:	Arvid Brodin <arvid.brodin@...n.com>
To:	David Miller <davem@...emloft.net>
CC:	Arvid Brodin <arvid.brodin@...n.com>, <netdev@...r.kernel.org>,
	<shemminger@...tta.com>, <joe@...ches.com>, <jboticario@...il.com>,
	<balferreira@...glemail.com>, <elias.molina@....es>
Subject: Re: [PATCH v4] net/hsr: Add support for the High-availability Seamless
 Redundancy protocol (HSRv0)

On 2013-09-21 02:43, Arvid Brodin wrote:
> It's weird though, the "len" bug doesn't show up in my practical tests - 
> scp of 16 MiB file (sha1sum compared afterwards) and ping with default 
> and 65 KB packets work just fine before and after this change - even
> between one fixed system and one with the bug remaining. Could it be
> that none of the network device drivers we use (e1000e and macb) make 
> use of nonlinear skbs?

Forget about this, e1000e is running on an architecture with 
HAVE_EFFICIENT_UNALIGNED_ACCESS, and on macb it does affect things - 
with the "fix" nothing works. :-| 


-- 
Arvid Brodin | Consultant (Linux)
XDIN AB | Knarrarnäsgatan 7 | SE-164 40 Kista | Sweden | xdin.com
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