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authorThomas Gleixner <tglx@linutronix.de>2007-03-05 00:30:45 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-05 07:57:53 -0800
commita5f5e43e2b1377392f9afe93aca29b9abf1d6a44 (patch)
treee0e2f64aecffe931e81390f97cc1453c5f1dd400
parent6d3baf2eb8bd680b2d4f509bc3dbf4dcd6e27a40 (diff)
[PATCH] fix "NMI appears to be stuck"
Testing NMI watchdog ... CPU#0: NMI appears to be stuck (54->54)! CPU#1: NMI appears to be stuck (0->0)! Keep the PIT/HPET alive when nmi_watchdog = 1 is given on the command line. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/i386/kernel/apic.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c
index 7a2c9cbdb51..2383bcf18c5 100644
--- a/arch/i386/kernel/apic.c
+++ b/arch/i386/kernel/apic.c
@@ -493,8 +493,15 @@ void __init setup_boot_APIC_clock(void)
/* No broadcast on UP ! */
if (num_possible_cpus() == 1)
return;
- } else
- lapic_clockevent.features &= ~CLOCK_EVT_FEAT_DUMMY;
+ } else {
+ /*
+ * If nmi_watchdog is set to IO_APIC, we need the
+ * PIT/HPET going. Otherwise register lapic as a dummy
+ * device.
+ */
+ if (nmi_watchdog != NMI_IO_APIC)
+ lapic_clockevent.features &= ~CLOCK_EVT_FEAT_DUMMY;
+ }
/* Setup the lapic or request the broadcast */
setup_APIC_timer();