Commit 20fe1d30 authored Jul 22, 2007 by Keith Owens Committed by Linus Torvalds Jul 22, 2007

i386: Do not include other cpus' interrupt 0 in nmi_watchdog



kstat_irqs(0) includes the count of interrupt 0 from all cpus, not just
the current cpu.  The updated interrupt 0 on other cpus can stop the
nmi_watchdog from tripping, so only include the current cpu's int 0.

Signed-off-by: Keith Owens <kaos@ocs.com.au>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 398cf2ab

arch/i386/kernel/nmi.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -353,7 +353,7 @@ __kprobes int nmi_watchdog_tick(struct pt_regs * regs, unsigned reason)
		* Take the local apic timer and PIT/HPET into account. We don't
		* know which one is active, when we have highres/dyntick on
		*/
		sum = per_cpu(irq_stat, cpu).apic_timer_irqs + kstat_irqs(0);
		sum = per_cpu(irq_stat, cpu).apic_timer_irqs + kstat_cpu(cpu).irqs[0];

		/* if the none of the timers isn't firing, this cpu isn't doing much */
		if (!touched && last_irq_sums[cpu] == sum) {