linux-kernel - [tip:perf/nmi] nmi_watchdog: Tell the world we're active

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Message-ID: <tip-5671a10e2bc7f99d9157c6044faf8be2ef302361@git.kernel.org>
Date:	Tue, 2 Mar 2010 14:30:34 GMT
From:	tip-bot for Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	a.p.zijlstra@...llo.nl, tglx@...utronix.de, mingo@...e.hu,
	dzickus@...hat.com
Subject: [tip:perf/nmi] nmi_watchdog: Tell the world we're active

Commit-ID:  5671a10e2bc7f99d9157c6044faf8be2ef302361
Gitweb:     http://git.kernel.org/tip/5671a10e2bc7f99d9157c6044faf8be2ef302361
Author:     Peter Zijlstra <a.p.zijlstra@...llo.nl>
AuthorDate: Tue, 2 Mar 2010 14:20:14 +0100
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Tue, 2 Mar 2010 15:02:05 +0100

nmi_watchdog: Tell the world we're active

Because I was wondering why perf stat wasn't working as expected..

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Don Zickus <dzickus@...hat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 kernel/nmi_watchdog.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/kernel/nmi_watchdog.c b/kernel/nmi_watchdog.c
index 0a6f57f..a79d211 100644
--- a/kernel/nmi_watchdog.c
+++ b/kernel/nmi_watchdog.c
@@ -244,6 +244,8 @@ static int __init spawn_nmi_watchdog_task(void)
 	if (nonmi_watchdog)
 		return 0;
 
+	printk(KERN_INFO "NMI watchdog enabled, takes one hw-pmu counter.\n");
+
 	err = cpu_callback(&cpu_nfb, CPU_UP_PREPARE, cpu);
 	if (err == NOTIFY_BAD) {
 		BUG();
--
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