From 542dee6f43067fa0101b53925aadf1d08c997cd4 Mon Sep 17 00:00:00 2001
From: Kyle McMartin <kyle@phobos.i.jkkm.org>
Date: Mon, 29 Mar 2010 23:40:27 -0400
Subject: linux-2.6-debug-nmi-timeout
---
arch/x86/kernel/apic/nmi.c | 2 +-
lib/Kconfig.debug | 8 ++++++++
2 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/apic/nmi.c b/arch/x86/kernel/apic/nmi.c
index 8aa65ad..ba7d55e 100644
--- a/arch/x86/kernel/apic/nmi.c
+++ b/arch/x86/kernel/apic/nmi.c
@@ -439,7 +439,7 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
* wait a few IRQs (5 seconds) before doing the oops ...
*/
__this_cpu_inc(alert_counter);
- if (__this_cpu_read(alert_counter) == 5 * nmi_hz)
+ if (__this_cpu_read(alert_counter) == CONFIG_DEBUG_NMI_TIMEOUT * nmi_hz)
/*
* die_nmi will return ONLY if NOTIFY_STOP happens..
*/
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 1fafb4b..963e78b 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -254,6 +254,14 @@ config SCHEDSTATS
application, you can say N to avoid the very slight overhead
this adds.
+config DEBUG_NMI_TIMEOUT
+ int "Number of seconds before NMI timeout"
+ depends on X86
+ default 5
+ help
+ This value is the number of seconds the NMI watchdog will tick
+ before it decides the machine has hung.
+
config TIMER_STATS
bool "Collect kernel timers statistics"
depends on DEBUG_KERNEL && PROC_FS
--
1.7.0.1