x86, NMI watchdog: disable NMIs on LVT0 in case NMI watchdog is not working

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Impact: change NMI watchdog detection and disabling sequence

Currently, if the NMI watchdog fails using IOAPIC method, it'll only disable
interrupts on 8259 if the timer is passing thru it. This patch disables
NMI delivery on LINT0 if the NMI watchdog initial test fails, just for safety.

Signed-off-by: Aristeu Rozanski <aris@redhat.com>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Aristeu Rozanski 2008-10-27 12:42:35 -04:00 • committed by Ingo Molnar

parent 6f290b4e01

commit 7d5a78cd98

1 changed files with 11 additions and 7 deletions

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arch/x86/kernel/nmi.c

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