Messages in this thread | | | Date | Tue, 05 Jan 2010 10:56:00 +0800 | From | Xiaotian Feng <> | Subject | Re: BUG during shutdown - bisected to commit e2912009 |
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On 01/05/2010 02:43 AM, Marc Dionne wrote: > On Fri, Jan 1, 2010 at 7:42 PM, Peter Zijlstra<peterz@infradead.org> wrote: >> On Fri, 2010-01-01 at 19:27 -0500, Marc Dionne wrote: >>> I'm getting a BUG with current kernels from >>> kernel/time/clockevents.c:263 when halting the system - a restart >>> behaves normally. I don't have a good camera handy at the moment to >>> capture the call stack on screen, but the call sequence is: >>> >>> clockevents_notify >>> hrtimer_cpu_notify >>> notifier_call_chain >>> raw_notifier_call_chain >>> _cpu_down >>> disable_nonboot_cpus >>> kernel_power_off >>> sys_reboot >>> >>> I bisected it down to commit e2912009: sched: Ensure set_task_cpu() is >>> never called on blocked tasks. There were a few commits tested along >>> the way where I got a freeze (with the power still on) instead of a >>> BUG. Reverting that commit from the current kernel doesn't look >>> trivial, but the commit immediately preceding this one does halt fine. >> >> We somehow seem to trip up the below patch, which doesn't really make >> sense, as I can't find how task placement would affect the below error. >> >> It seems to purely test against the hot-unplugged cpu, not a cpu the >> task is running on. >> >> --- >> commit bb6eddf7676e1c1f3e637aa93c5224488d99036f >> Author: Thomas Gleixner<tglx@linutronix.de> >> Date: Thu Dec 10 15:35:10 2009 +0100 > > Probably predictable but worth testing, reverting that patch does > allow my system to shutdown cleanly. That BUG_ON was removed by reverting that patch, so you can shutdown cleanly.
Could you please attach you kernel config file? I'm a little confused about how do you revert e2912009, manually? I can't see any connections between e2912009 and bb6eddf7, could you please show me your timer list (cat /proc/timer_list) > > Marc >
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