Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755206Ab0KWPGT (ORCPT ); Tue, 23 Nov 2010 10:06:19 -0500 Received: from io.pong.be ([68.233.169.42]:58072 "EHLO io.pong.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755060Ab0KWPGS (ORCPT ); Tue, 23 Nov 2010 10:06:18 -0500 X-Greylist: delayed 1303 seconds by postgrey-1.27 at vger.kernel.org; Tue, 23 Nov 2010 10:06:18 EST Date: Tue, 23 Nov 2010 09:44:28 -0500 From: Ward Vandewege To: Krzysztof Halasa Cc: Bernie Innocenti , lkml , Jan Seiffert , netdev@vger.kernel.org Subject: Re: pc300too on a modern kernel? Message-ID: <20101123144428.GA18504@countzero.vandewege.net> Mail-Followup-To: Ward Vandewege , Krzysztof Halasa , Bernie Innocenti , lkml , Jan Seiffert , netdev@vger.kernel.org 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 Content-Disposition: inline In-Reply-To: X-message-flag: Outlook (Express) is an extremely dangerous program that will get you all sorts of nasty viruses. User-Agent: Mutt/1.5.20 (2009-06-14) X-detected-operating-system: by mail.pong.be: Error: This connection is not (no longer?) in the cache. Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 932 Lines: 23 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/