From 9c9b81f77330ddc003a2de2f35fa6a20410c1a62 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Thu, 27 Mar 2008 23:39:42 +0100
Subject: [PATCH] x86: print message if nmi_watchdog=2 cannot be enabled
right now if there's no CPU support for nmi_watchdog=2 we'll just
refuse it silently.
print a useful warning.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/kernel/cpu/perfctr-watchdog.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/perfctr-watchdog.c b/arch/x86/kernel/cpu/perfctr-watchdog.c
index 19a359472ae14..b943e10ad8143 100644
--- a/arch/x86/kernel/cpu/perfctr-watchdog.c
+++ b/arch/x86/kernel/cpu/perfctr-watchdog.c
@@ -667,8 +667,10 @@ int lapic_watchdog_init(unsigned nmi_hz)
{
if (!wd_ops) {
probe_nmi_watchdog();
- if (!wd_ops)
+ if (!wd_ops) {
+ printk(KERN_INFO "NMI watchdog: CPU not supported\n");
return -1;
+ }
if (!wd_ops->reserve()) {
printk(KERN_ERR
--
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