linux-kernel - Re: pc300too on a modern kernel?

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Date:	Tue, 23 Nov 2010 09:44:28 -0500
From:	Ward Vandewege <ward@....org>
To:	Krzysztof Halasa <khc@...waw.pl>
Cc:	Bernie Innocenti <bernie@...ewiz.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Jan Seiffert <kaffeemonster@...glemail.com>,
	netdev@...r.kernel.org
Subject: Re: pc300too on a modern kernel?

On Mon, Nov 22, 2010 at 10:20:02PM +0100, Krzysztof Halasa wrote:
> > With this workaround applied, we're st seeing occasional clusters of
> > packet loss. We're working to graph the ping loss alongside traffic to
> > see if there's any correlation.
> 
> That's interesting. I remember seeing some TX underruns at higher
> speeds, though nothing alike at 2 Mb/s. What bit rate are you using?
> Does "ifconfig hdlc0" show any errors?

This turned out to be caused by line saturation. We were not seeing this
before we upgraded to the latest kernel because we have a set of qos rules
that we forgot to install on our new box. Mea culpa...

Thanks,
Ward.

-- 
Ward Vandewege <ward@....org>
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