From owner-cvs-all@FreeBSD.ORG Tue Aug 22 15:26:05 2006 Return-Path: X-Original-To: cvs-all@freebsd.org Delivered-To: cvs-all@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2A13916A4DA; Tue, 22 Aug 2006 15:26:05 +0000 (UTC) (envelope-from anderson@centtech.com) Received: from mh1.centtech.com (moat3.centtech.com [207.200.51.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id B9D0743D53; Tue, 22 Aug 2006 15:26:04 +0000 (GMT) (envelope-from anderson@centtech.com) Received: from [10.177.171.220] (neutrino.centtech.com [10.177.171.220]) by mh1.centtech.com (8.13.1/8.13.1) with ESMTP id k7MFQ3vE037361; Tue, 22 Aug 2006 10:26:03 -0500 (CDT) (envelope-from anderson@centtech.com) Message-ID: <44EB220A.5000709@centtech.com> Date: Tue, 22 Aug 2006 10:26:02 -0500 From: Eric Anderson User-Agent: Thunderbird 1.5.0.5 (X11/20060802) MIME-Version: 1.0 To: Gleb Smirnoff References: <200608220232.k7M2WmCr080275@repoman.freebsd.org> <20060822152333.GV96644@FreeBSD.org> In-Reply-To: <20060822152333.GV96644@FreeBSD.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV 0.87.1/1708/Tue Aug 22 07:43:00 2006 on mh1.centtech.com X-Virus-Status: Clean Cc: "Patrick M. Hausen" , cvs-src@freebsd.org, src-committers@freebsd.org, cvs-all@freebsd.org, Pyun YongHyeon Subject: Re: cvs commit: src/sys/dev/em if_em.c X-BeenThere: cvs-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the entire tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 Aug 2006 15:26:05 -0000 On 08/22/06 10:23, Gleb Smirnoff wrote: > On Tue, Aug 22, 2006 at 02:32:48AM +0000, Pyun YongHyeon wrote: > P> yongari 2006-08-22 02:32:48 UTC > P> > P> FreeBSD src repository > P> > P> Modified files: > P> sys/dev/em if_em.c > P> Log: > P> It seems that em(4) misses Tx completion interrupts under certain > P> conditions. The cause of missing Tx completion interrupts comes from > P> Tx interrupt moderation mechanism(delayed interrupts) or chipset bug. > P> If Tx interrupt moderation mechanism is the cause of false watchdog > P> timeout error we should have to fix all device drivers that have Tx > P> interrupt moderation capability. We may need more investigation > P> for this issue. Anyway, the fix is the same for both cases. > P> > P> This should fix occasional watchdog timeout errors seen on a few > P> systems. > P> > P> Reported by: -net, Patrick M. Hausen < hausen AT punkt DOT de > > P> Tested by: Patrick M. Hausen < hausen AT punkt DOT de > > > This look like a workaround, not a fix the root of the problem. Several > people on net said that this problem disappears if debug.mpsafenet=0. > So I think there is a problem in FreeBSD or driver, not in chip. > And it also worked perfectly for a very very long time until 6.x tree. I went from 5-STABLE to 6-STABLE and started seeing it a lot ( a few times per day) on a couple servers. Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology Anything that works is better than anything that doesn't. ------------------------------------------------------------------------