From mboxrd@z Thu Jan 1 00:00:00 1970 From: Helge Deller Subject: Re: PA8800 with 3.9.0-rc1-JeR-10942-g6dbe51c : WARNING: at lib/timerqueue.c:74 Date: Tue, 19 Mar 2013 23:38:59 +0100 Message-ID: <5148E903.1020105@gmx.de> References: <20130315152226.46ad0993@marga.jer-c2.orkz.net> <20130318135831.7c14b6e7@marga.jer-c2.orkz.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: John David Anglin , linux-parisc@vger.kernel.org To: Jeroen Roovers Return-path: In-Reply-To: <20130318135831.7c14b6e7@marga.jer-c2.orkz.net> List-ID: List-Id: linux-parisc.vger.kernel.org Hi Jeroen, On 03/18/2013 01:58 PM, Jeroen Roovers wrote: > On Sat, 16 Mar 2013 18:34:17 -0400 > John David Anglin wrote: > >> On 15-Mar-13, at 10:22 AM, Jeroen Roovers wrote: >> >>> [ 7.912000] WARNING: at lib/timerqueue.c:74 >> >> Is this reproducible? I have seen the occasional RB issue but I've >> never been able to reproduce them. > > Yes. Every time I boot this kernel with Helge's patches, built with > the previously attached config, it trips on this very same issue. Which patches are you referring to? All my patches are upstream in 3.9.0-rcX. I built a kernel with your config as well, but did not ran into the issues you have. But that's not really surprising, since I tested on a different 1-CPU machine only... Just looking at your config (which I diffed with the one I use), I would suggest that you play around with a few of the following options to narrow down the problem (ignore the +/- -> should just give you an idea what to change). Out of your backtrace it seems there is a problem with timer/SMP/locking or similiar (or just our old cache-problem)... Helge -CONFIG_GENERIC_LOCKBREAK=y -CONFIG_TREE_PREEMPT_RCU=y -CONFIG_PREEMPT_RCU=y +CONFIG_TREE_RCU=y +# CONFIG_PREEMPT_RCU is not set -# CONFIG_RCU_BOOST is not set -CONFIG_SLUB_DEBUG=y -# CONFIG_COMPAT_BRK is not set -# CONFIG_SLAB is not set -CONFIG_SLUB=y +CONFIG_SLAB=y +# CONFIG_SLUB is not set +# CONFIG_SLOB is not set -CONFIG_UNINLINE_SPIN_UNLOCK=y -CONFIG_MUTEX_SPIN_ON_OWNER=y +CONFIG_INLINE_SPIN_UNLOCK_IRQ=y +CONFIG_INLINE_READ_UNLOCK=y +CONFIG_INLINE_READ_UNLOCK_IRQ=y +CONFIG_INLINE_WRITE_UNLOCK=y +CONFIG_INLINE_WRITE_UNLOCK_IRQ=y -# CONFIG_PREEMPT_NONE is not set +CONFIG_PREEMPT_NONE=y -CONFIG_PREEMPT=y -CONFIG_PREEMPT_COUNT=y +# CONFIG_PREEMPT is not set