On Wed, 2007-02-21 at 09:38 -0800, Daniel Walker wrote: > > > > > > Could be the switch over then which confuses the NMI . > > > > Why? The switch just stops the PIT/HPET. It does not fiddle with IO_APIC > > and friends at all. > > I'm not an expert on the io-apic, but the check_timer() function seemed > to assume IRQ0 was happening regularly ..
Again: check_timer() is called _BEFORE_ we even touch the local APIC timers. At this point PIT/HPET _IS_ firing IRQ0 with HZ frequency. > Well, I'm pretty sure it's HRT, cause in prior versions this only > happened when HRT is enabled. Then you guys went to the lapic all the > time, and now this is happening all the time .. The NMI is stuck: if (nmi_count(cpu) - prev_nmi_count[cpu] <= 5) { printk("CPU#%d: NMI appears to be stuck (%d->%d)!\n", cpu, prev_nmi_count[cpu], nmi_count(cpu)); This has nothing to do with jiffies. There have been a bunch of changes in arch/i386/kernel/nmi.c as well. > You can't reproduce this? Nope. Also all my machines emit something like: "ACPI: LAPIC_NMI (acpi_id[0x00] dfl dfl lint[0x1])" In your boot log nothing to see. tglx - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/