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2.6.24-rc7 lockdep warning when poweroff

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From: Dave Young <hidave.darkstar@...>
To: Linus Torvalds <torvalds@...>
Cc: Linux Kernel Mailing List <linux-kernel@...>, Ingo Molnar <mingo@...>
Subject: 2.6.24-rc7 lockdep warning when poweroff
Date: Monday, January 14, 2008 - 5:04 am

Hi,

When I "halt -p", lockdep warnings triggered as following (hand copy):

WARNING : at kernel/lockdep.c: 700 lookup_lock_class()

<snip>
lock_acquire
cleanup_workqueue_thread
workqueue_cpu_callback
notifier_call_chain
__raw_notifier_call_chain
raw_notifier_call_chain
__cpu_down
disable_nonboot_cpus
kernel_power_off
sys_reboot
<snip>

Regards
dave
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Messages in current thread:
2.6.24-rc7 lockdep warning when poweroff, Dave Young, (Mon Jan 14, 5:04 am)
Re: 2.6.24-rc7 lockdep warning when poweroff, Peter Zijlstra, (Mon Jan 14, 5:24 am)
Re: 2.6.24-rc7 lockdep warning when poweroff, Johannes Berg, (Mon Jan 14, 6:35 am)
Re: 2.6.24-rc7 lockdep warning when poweroff, Peter Zijlstra, (Mon Jan 14, 6:41 am)
Re: 2.6.24-rc7 lockdep warning when poweroff, Johannes Berg, (Mon Jan 14, 6:51 am)
Re: 2.6.24-rc7 lockdep warning when poweroff, Johannes Berg, (Tue Jan 15, 6:41 am)
Re: 2.6.24-rc7 lockdep warning when poweroff, Peter Zijlstra, (Tue Jan 15, 8:21 am)
Re: 2.6.24-rc7 lockdep warning when poweroff, Johannes Berg, (Tue Jan 15, 7:54 pm)
Re: 2.6.24-rc7 lockdep warning when poweroff, Johannes Berg, (Tue Jan 15, 8:39 am)
Re: 2.6.24-rc7 lockdep warning when poweroff, Peter Zijlstra, (Tue Jan 15, 8:47 am)
Re: 2.6.24-rc7 lockdep warning when poweroff, Ingo Molnar, (Wed Jan 16, 4:11 am)
[PATCH for 2.6.24] fix workqueue creation API lockdep intera..., Johannes Berg, (Tue Jan 15, 9:04 am)
Re: [PATCH for 2.6.24] fix workqueue creation API lockdep in..., Dave Young, (Wed Jan 16, 12:41 am)
Re: 2.6.24-rc7 lockdep warning when poweroff, Dave Young, (Mon Jan 14, 8:31 pm)
Re: 2.6.24-rc7 lockdep warning when poweroff, Dave Young, (Mon Jan 14, 9:24 pm)
Re: 2.6.24-rc7 lockdep warning when poweroff, Peter Zijlstra, (Tue Jan 15, 4:42 am)