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Date:	Sat, 5 Apr 2014 11:56:48 +0530
From:	Viresh Kumar <>
To:	Jet Chen <>
Cc:	Thomas Gleixner <>,
	Fengguang Wu <>,
	Linux Kernel Mailing List <>
Subject: Re: WARNING: CPU: 0 PID: 1935 at kernel/timer.c:1621 migrate_timer_list()

On 5 April 2014 10:00, Jet Chen <> wrote:
> vmlinuz from our build system doesn't have debug information. It is hard to
> use objdump to identify which routine is timer->function.

I see...

> But after several times trials, I get below dmesg messages.
> It is clear to see address of "timer->function" is 0xffffffff810d7010.
> In calling stack, " [<ffffffff810d7010>] ?
> clocksource_watchdog_kthread+0x40/0x40 ". So I guess timer->function is
> clocksource_watchdog_kthread.

Hmm.. not exactly this function as this isn't timer->function for any timer.
But I think I have found the right function with this hint:

Can you please try to test the attached patch, which must fix it.
Untested. I will
then post it with your Tested-by :)


View attachment "0001-clocksource-register-cpu-notifier-to-remove-timer-fr.patch" of type "text/x-patch" (6108 bytes)

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