Re: Panic 2.6.24-3 NMI Watchdog detected LOCKUP on CPU 0

Ed Tomlinson
2008-03-01T14:39:27Z

On March 1, 2008, Thomas Gleixner wrote:
> On Sat, 1 Mar 2008, Ed Tomlinson wrote:
> > Hi,
> >
> > I have been seeing these since I installed .24 kernels. It does not seem to matter if I change the clocksource from tsc
> > to apci_pm. Its happened with all .24 kernels I have tried starting with stock 2.6.24 upto 2.6.24-gentoo-r2 + 2.6.24-3
> >
> > Ideas?
>
> Questions first. Is there a particular reason to use idle=poll ?

For another issue Ingo suggested using 'nmi_watchdog=2 idle=poll' to get the nmi_watchdog working. I can remove it
if you think it will help.

> Idea: does the patch below help ?

I'm rebuilding any will let you know. It may take a while to trigger.

Thanks for the prompt response!
Ed

> Thanks,
> tglx
>
> ---
>
> arch/x86/kernel/process_64.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> Index: linux-2.6.24/arch/x86/kernel/process_64.c
> ===================================================================
> --- linux-2.6.24.orig/arch/x86/kernel/process_64.c
> +++ linux-2.6.24/arch/x86/kernel/process_64.c
> @@ -212,14 +212,13 @@ void cpu_idle (void)
> current_thread_info()->status |= TS_POLLING;
> /* endless idle loop with no priority at all */
> while (1) {
> + tick_nohz_stop_sched_tick();
> while (!need_resched()) {
> void (*idle)(void);
>
> if (__get_cpu_var(cpu_idle_state))
> __get_cpu_var(cpu_idle_state) = 0;
>
> - tick_nohz_stop_sched_tick();
> -
> rmb();
> idle = pm_idle;
> if (!idle)
> --
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