On Fri, Jan 1, 2010 at 7:42 PM, Peter Zijlstra<peterz@xxxxxxxxxxxxx> wrote:That BUG_ON was removed by reverting that patch, so you can shutdown cleanly.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@xxxxxxxxxxxxx>
Date: Thu Dec 10 15:35:10 2009 +0100
Probably predictable but worth testing, reverting that patch does
allow my system to shutdown cleanly.
Marc