From owner-freebsd-bugs@FreeBSD.ORG Fri Sep 15 14:40:24 2006 Return-Path: X-Original-To: freebsd-bugs@hub.freebsd.org Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0B7A616A407 for ; Fri, 15 Sep 2006 14:40:24 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id D108B43D55 for ; Fri, 15 Sep 2006 14:40:23 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.4/8.13.4) with ESMTP id k8FEeNK5067218 for ; Fri, 15 Sep 2006 14:40:23 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.4/8.13.4/Submit) id k8FEeNDe067217; Fri, 15 Sep 2006 14:40:23 GMT (envelope-from gnats) Date: Fri, 15 Sep 2006 14:40:23 GMT Message-Id: <200609151440.k8FEeNDe067217@freefall.freebsd.org> To: freebsd-bugs@FreeBSD.org From: Gleb Smirnoff Cc: Subject: Re: kern/103256: em0: watchdog timeout -- resetting (6.1-STABLE) X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Gleb Smirnoff List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 15 Sep 2006 14:40:24 -0000 The following reply was made to PR kern/103256; it has been noted by GNATS. From: Gleb Smirnoff To: Imri Zvik Cc: freebsd-gnats-submit@FreeBSD.org Subject: Re: kern/103256: em0: watchdog timeout -- resetting (6.1-STABLE) Date: Fri, 15 Sep 2006 18:35:59 +0400 On Thu, Sep 14, 2006 at 08:46:08AM +0000, Imri Zvik wrote: I> >Environment: I> FreeBSD wintergreen 6.1-STABLE FreeBSD 6.1-STABLE #1: Wed Aug 30 09:54:35 IDT 2006 root@wintergreen:/usr/obj/usr/src/sys/IGLD i386 I> >Description: I> I've recently upgraded my 6.0-STABLE machine to 6.1-STABLE, and since the upgrade i'm getting "em0: watchdog timeout -- resetting" messages every once in a while (sometimes twice a day, sometimes every couple of days). This causes the machine to be unstable, network-wise (connections being dropped, etc.) I> I> Sep 14 06:35:41 wintergreen kernel: em0: watchdog timeout -- resetting I> Sep 14 06:35:41 wintergreen kernel: em0: link state changed to DOWN I> Sep 14 06:35:42 wintergreen kernel: em0: link state changed to UP I> I> I> i've found this discussion on freebsd-stable (http://www.mail-archive.com/freebsd-stable@freebsd.org/msg81865.html) indicating that i am not the only one suffering from this issue. As I already have mentioned many times on the mailing lists. Before revision 1.65.2.14 of if_em.c, the watchdog timeout event's was not logged at all. However, there is definitely a regression in RELENG_6 that leads to fake(?) watchdog timeouts on some systems. Unfortunately, I haven't yet reproduced it on my systems. Some people report that this is SMP issue, setting debug.mpsafenet=0 plumbs the problem. Not sure whether you have the regression, or you are seeing the watchdog events, that were not logged before. -- Totus tuus, Glebius. GLEBIUS-RIPN GLEB-RIPE