* [PATCH] i386: conditionalize touching of memory in touch_nmi_watchdog()
@ 2006-11-15 14:57 Jan Beulich
0 siblings, 0 replies; only message in thread
From: Jan Beulich @ 2006-11-15 14:57 UTC (permalink / raw)
To: linux-kernel
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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2006-11-15 14:57 [PATCH] i386: conditionalize touching of memory in touch_nmi_watchdog() Jan Beulich
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