From owner-freebsd-stable@FreeBSD.ORG Thu Jan 19 21:56:55 2012 Return-Path: Delivered-To: freebsd-stable@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id D2CCF1065673; Thu, 19 Jan 2012 21:56:55 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140]) by mx1.freebsd.org (Postfix) with ESMTP id A906D8FC15; Thu, 19 Jan 2012 21:56:54 +0000 (UTC) Received: from porto.starpoint.kiev.ua (porto-e.starpoint.kiev.ua [212.40.38.100]) by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id XAA23912; Thu, 19 Jan 2012 23:56:52 +0200 (EET) (envelope-from avg@FreeBSD.org) Received: from localhost ([127.0.0.1]) by porto.starpoint.kiev.ua with esmtp (Exim 4.34 (FreeBSD)) id 1RnzyW-000CPU-5j; Thu, 19 Jan 2012 23:56:52 +0200 Message-ID: <4F1891A3.5030708@FreeBSD.org> Date: Thu, 19 Jan 2012 23:56:51 +0200 From: Andriy Gapon User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:9.0) Gecko/20111222 Thunderbird/9.0 MIME-Version: 1.0 To: =?ISO-8859-2?Q?L=E1szl=F3_K=E1rolyi?= References: <4F181FE7.30904@karolyi.hu> <4F18506C.4050604@FreeBSD.org> <4F187706.90201@FreeBSD.org> <16276A6E-A7EE-41A3-8861-E3F9424303D0@karolyi.hu> <4F188CD5.1090402@FreeBSD.org> In-Reply-To: X-Enigmail-Version: undefined Content-Type: text/plain; charset=ISO-8859-2 Content-Transfer-Encoding: 8bit Cc: Alexander Motin , freebsd-stable@FreeBSD.org Subject: Re: Strange 'hangs' with RELENG_9 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Jan 2012 21:56:55 -0000 on 19/01/2012 23:47 László Károlyi said the following: > On 2012.01.19., at 22:36, Andriy Gapon wrote: > >> on 19/01/2012 23:24 László Károlyi said the following: >>> On 2012.01.19., at 21:03, Andriy Gapon wrote: >>> >>>> László, can you please try changing kern.timecounter.hardware to TSC-low or >>>> ACPI-fast? >>> >>> No result, the machine still does hang :( Tried all options. >> >> While you are there, can you try changing the eventtimer choice instead? E.g. >> to LAPIC. > > Looks like this solved the hang problem. No system hang in the last 10 minutes. > Shall i make a sysctl.conf entry to change this value by default, or what do you > suggest? You can do that via loader.conf or sysctl.conf. The first option should be more reliable. What you see can mean two things (at least that's what I can think of): - problems/quirks with HPET hardware on your system - problems with IPI forwarding of time ticks between CPUs Maybe there would be additional requests for debugging info if you are interested in pursuing this further and are able to provide the info. > I'll do a reboot now, to see if there will be a kernel panic at reboot, I > compiled the kernel now with all the debug options. When it panicks, I'll post > another screenshot of the console, this time a bigger one, as I managed to > change the resolution of the console. -- Andriy Gapon