From 34fe7f87d931cc5250397b7df4a2463f39a519b6 Mon Sep 17 00:00:00 2001
From: Andi Kleen <andi@firstfloor.org>
Date: Thu, 12 Feb 2009 13:49:33 +0100
Subject: [PATCH] --- yaml --- r: 138643 b: refs/heads/master c:
 8457c84d68678cbfd4167a9073b89da58e48c037 h: refs/heads/master i:   138641:
 a17e12b50d8ae0bd65b9061579ec93f0e7d30813   138639:
 20ff9ada05f2abbae797420de170b956a86a7116 v: v3

---
 [refs]                                    |  2 +-
 trunk/arch/x86/kernel/cpu/mcheck/mce_64.c | 11 +++++------
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/[refs] b/[refs]
index 07d4f518d9a9..d07472698ea9 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f9695df42cdbca78530b4458c38ecfdd0bb90079
+refs/heads/master: 8457c84d68678cbfd4167a9073b89da58e48c037
diff --git a/trunk/arch/x86/kernel/cpu/mcheck/mce_64.c b/trunk/arch/x86/kernel/cpu/mcheck/mce_64.c
index 39f8bb525a74..9017609cadd9 100644
--- a/trunk/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ b/trunk/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -28,6 +28,7 @@
 #include <linux/kdebug.h>
 #include <linux/kobject.h>
 #include <linux/sysfs.h>
+#include <linux/ratelimit.h>
 #include <asm/processor.h>
 #include <asm/msr.h>
 #include <asm/mce.h>
@@ -488,11 +489,11 @@ static DECLARE_WORK(mce_trigger_work, mce_do_trigger);
  */
 int mce_notify_user(void)
 {
+	/* Not more than two messages every minute */
+	static DEFINE_RATELIMIT_STATE(ratelimit, 60*HZ, 2);
+
 	clear_thread_flag(TIF_MCE_NOTIFY);
 	if (test_and_clear_bit(0, &notify_user)) {
-		static unsigned long last_print;
-		unsigned long now = jiffies;
-
 		wake_up_interruptible(&mce_wait);
 
 		/*
@@ -503,10 +504,8 @@ int mce_notify_user(void)
 		if (trigger[0] && !work_pending(&mce_trigger_work))
 			schedule_work(&mce_trigger_work);
 
-		if (time_after_eq(now, last_print + (check_interval*HZ))) {
-			last_print = now;
+		if (__ratelimit(&ratelimit))
 			printk(KERN_INFO "Machine check events logged\n");
-		}
 
 		return 1;
 	}