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Commit c6ea396d authored Dec 07, 2006 by Jan Beulich Committed by Andi Kleen Dec 07, 2006

[PATCH] i386: Don't touch per cpu memory of offline CPUs in touch_nmi_watchdog



Just like on x86-64, don't touch foreign CPUs' memory if the watchdog
isn't enabled at all.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>

parent b0bfece4

arch/i386/kernel/nmi.c

+9 −7

Original line number	Diff line number	Diff line
		@@ -870,14 +870,16 @@ static unsigned int

		void touch_nmi_watchdog (void)
		{
		int i;
		if (nmi_watchdog > 0) {
		unsigned cpu;

		/*
		* Just reset the alert counters, (other CPUs might be
		* spinning on locks we hold):
		*/
		for_each_possible_cpu(i)
		alert_counter[i] = 0;
		for_each_present_cpu (cpu)
		alert_counter[cpu] = 0;
		}

		/*
		* Tickle the softlockup detector too: