From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Morton Subject: Re: [patch 1/4] Ignore stolen time in the softlockup watchdog Date: Tue, 24 Apr 2007 10:57:38 -0700 Message-ID: <20070424105738.e0ce36a9.akpm@linux-foundation.org> References: <20070327214919.800272641@goop.org> <20070327215827.871954359@goop.org> <20070423234910.50149faf.akpm@linux-foundation.org> <462E43A7.1050001@goop.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <462E43A7.1050001@goop.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: Jeremy Fitzhardinge Cc: Bhargava , Thomas@smtp2.linux-foundation.org, Lindsley , Prarit@smtp2.linux-foundation.org, john stultz , Zachary@smtp2.linux-foundation.org, Linux Kernel , Eric Dumazet , virtualization@lists.osdl.org, Chris Lalancette , Paul Mackerras , Rick@smtp2.linux-foundation.org, Martin Schwidefsky , Ingo Molnar , Gleixner List-Id: virtualization@lists.linuxfoundation.org On Tue, 24 Apr 2007 10:51:35 -0700 Jeremy Fitzhardinge wrote: > Andrew Morton wrote: > > It seems fairly sensitive to .config settings. See > > http://userweb.kernel.org/~akpm/config-sony.txt > > > > I haven't tried your config yet, but I haven't managed to reproduce it > by playing with the usual suspects in my config (SMP, PREEMPT). Any > idea about which config changes make the difference? I said that because the damn thing went away when I was hunting it down because I lost the config and was unable to remember the right combination of debug settings. Fortunately it later came back so I took care to preserve the config. > Hm, is it caused by using sched_clock() to generate the printk > timestamps while generating the lock test output? Conceivably. What does that locking API test do? I was using printk timestamps and netconsole at the time.