Commit c6ea396d authored by Jan Beulich's avatar Jan Beulich Committed by Andi Kleen
Browse files

[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: default avatarJan Beulich <jbeulich@novell.com>
Signed-off-by: default avatarAndi 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: