From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ward Vandewege Subject: Re: pc300too on a modern kernel? Date: Tue, 23 Nov 2010 09:44:28 -0500 Message-ID: <20101123144428.GA18504@countzero.vandewege.net> References: <20100902131531.GA19028@countzero.vandewege.net> <1289421869.9336.49.camel@giskard.codewiz.org> <1289944619.2677.22.camel@giskard.codewiz.org> <1290442675.5515.92.camel@giskard.codewiz.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Bernie Innocenti , lkml , Jan Seiffert , netdev@vger.kernel.org To: Krzysztof Halasa Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org 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