Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759750AbYCWTJd (ORCPT ); Sun, 23 Mar 2008 15:09:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755684AbYCWTJZ (ORCPT ); Sun, 23 Mar 2008 15:09:25 -0400 Received: from bombadil.infradead.org ([18.85.46.34]:59120 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755503AbYCWTJZ (ORCPT ); Sun, 23 Mar 2008 15:09:25 -0400 Subject: Re: 2.6.25-rc: complete lockup on boot/start of X (bisected) From: Peter Zijlstra To: Marcin Slusarz Cc: LKML , Ingo Molnar , Thomas Gleixner In-Reply-To: <1206299168.6437.119.camel@lappy> References: <20080302185935.GA6100@joi> <1204485071.6240.56.camel@lappy> <20080302194748.GA6005@joi> <1204487917.6240.64.camel@lappy> <20080323154416.GA6817@joi> <1206287670.6437.113.camel@lappy> <20080323184427.GA6691@joi> <1206299168.6437.119.camel@lappy> Content-Type: text/plain Date: Sun, 23 Mar 2008 20:09:01 +0100 Message-Id: <1206299341.6437.121.camel@lappy> Mime-Version: 1.0 X-Mailer: Evolution 2.22.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1190 Lines: 37 On Sun, 2008-03-23 at 20:06 +0100, Peter Zijlstra wrote: > On Sun, 2008-03-23 at 19:46 +0100, Marcin Slusarz wrote: > > > 4 different lockups: > > http://alan.umcs.lublin.pl/~mslusarz/kernel/2008.03.23-lockup/ > > Brilliant, these are extremely helpful. > > What seems to happen is a classic xtime deadlock, doing a xtime > seq_readlock while holding a seq_writelock. > > Only need to figure out _why_ that is happening.... Does your machine boot with the following patch applied: diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 671af61..e300889 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -190,9 +190,6 @@ static void change_clocksource(void) clocksource_calculate_interval(clock, NTP_INTERVAL_LENGTH); tick_clock_notify(); - - printk(KERN_INFO "Time: %s clocksource has been installed.\n", - clock->name); } #else static inline void change_clocksource(void) { } -- 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/