Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756511AbXICKHu (ORCPT ); Mon, 3 Sep 2007 06:07:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752256AbXICKHn (ORCPT ); Mon, 3 Sep 2007 06:07:43 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:40296 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751428AbXICKHm (ORCPT ); Mon, 3 Sep 2007 06:07:42 -0400 From: "Rafael J. Wysocki" To: Pavel Machek Subject: Re: cpu hotplug support broken in 2.6.23-rc3 Date: Mon, 3 Sep 2007 12:19:12 +0200 User-Agent: KMail/1.9.5 Cc: Jeff Chua , rusty@rustycorp.com.au, vatsa@in.ibm.com, zwane@arm.linux.org.uk, kernel list , Thomas Gleixner References: <20070827104350.GA2073@elf.ucw.cz> <20070903034720.GB3655@ucw.cz> In-Reply-To: <20070903034720.GB3655@ucw.cz> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200709031219.12846.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1370 Lines: 39 On Monday, 3 September 2007 05:47, Pavel Machek wrote: > Hi! > > > > Can you try 20-or-so tests? Mine hangs randomly, so it survived 4 or > > > so cycles at one point. > > > > Mine still survives with this ... with sleep 1 ... > > > > # for((i=0; i<100; i++)); do echo $i; echo $((i % 2)) > > >/sys/devices/system/cpu/cpu1/online; sleep 1; done > > > > and this as well ... without sleep ... > > > > # for((i=0; i<100; i++)); do echo $i; echo $((i % 2)) > > >/sys/devices/system/cpu/cpu1/online; done > > > > I'm on reiserfs. gcc 3.4.5. Config sent to you seperately so as not to > > cloud lkml. If anyone wants the config, please let me know. Is mime > > "attachment" acceptable now on lkml? > > Ok, so it gets weirder. I have now machine in "hung" state; other > consoles still work, but there are no timers - sleep 1 hangs forever. > > sysrq-t shows kstopmachine hung in hrtimer_try_to_cancel. > > So I indeed suspect difference-in-kconfig to trigger this, and will > try disabling noidlehz. I would unset CONFIG_HIGH_RES_TIMERS for starters. Well, I guess Thomas should know about that. ;-) Greetings, Rafael - 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/