On Mon, 2007-03-19 at 22:51 +0100, Stefan Prechtel wrote:
> 2007/3/19, Thomas Gleixner <[EMAIL PROTECTED]>:
> > On Mon, 2007-03-19 at 21:35 +0100, Stefan Prechtel wrote:
> > > CPU0 CPU1
> > > 0: 28289 0 local-APIC-edge-fasteio timer
> > > ...
> > > LOC: 28237 28236
> > >
> > > after a read: (I hope that is this what you want :-)
> > > CPU0 CPU1
> > > 0: 30344 0 local-APIC-edge-fasteio timer
> > > ...
> > > LOC: 30292 30291
> >
> > Is this with AC plugged in ? If yes, please provide the same numbers for
> > battery mode.
>
> Yes. And here is the output for battery mode (2.6.20):
> CPU0 CPU1
> 0: 292153 0 local-APIC-edge-fasteio timer
> LOC: 292114 292113
>
> CPU0 CPU1
> 0: 293263 0 local-APIC-edge-fasteio timer
> LOC: 293224 293223
Hmm. Can you please apply the following patch on top of 2.6.20 and
check, if the WARN_ON_ONCE triggers when you boot w/o AC plugged ?
Thanks,
tglx
Index: linux-2.6.20/arch/i386/kernel/apic.c
===================================================================
--- linux-2.6.20.orig/arch/i386/kernel/apic.c
+++ linux-2.6.20/arch/i386/kernel/apic.c
@@ -1174,6 +1174,8 @@ void switch_APIC_timer_to_ipi(void *cpum
cpumask_t mask = *(cpumask_t *)cpumask;
int cpu = smp_processor_id();
+ WARN_ON_ONCE(1);
+
if (cpu_isset(cpu, mask) &&
!cpu_isset(cpu, timer_bcast_ipi)) {
disable_APIC_timer();
-
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