Messages in this thread Patch in this message | | | Date | Wed, 15 Nov 2006 14:57:32 +0000 | From | "Jan Beulich" <> | Subject | [PATCH] i386: conditionalize touching of memory in touch_nmi_watchdog() |
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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>
--- linux-2.6.19-rc5/arch/i386/kernel/nmi.c 2006-11-08 09:21:37.000000000 +0100 +++ 2.6.19-rc5-i386-touch_nmi_watchdog/arch/i386/kernel/nmi.c 2006-11-06 09:10:16.000000000 +0100 @@ -867,14 +867,16 @@ 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; + /* + * Just reset the alert counters, (other CPUs might be + * spinning on locks we hold): + */ + for_each_present_cpu (cpu) + alert_counter[cpu] = 0; + } /* * Tickle the softlockup detector too:
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