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