From 542dee6f43067fa0101b53925aadf1d08c997cd4 Mon Sep 17 00:00:00 2001 From: Kyle McMartin 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