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x86, mce: replace machine check events logged interval with ratelimit

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Impact: behavior change, use common code

Use a standard leaky bucket ratelimit for the machine check
warning print interval instead of waiting every check_interval.
Also decrease the limit to twice per minute.
This interacts better with threshold interrupts because
they can happen more often than check_interval.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Andi Kleen 2009-02-12 13:49:33 +01:00 • committed by H. Peter Anvin
parent f9695df42c
commit 8457c84d68
1 changed files with 5 additions and 6 deletions

11
arch/x86/kernel/cpu/mcheck/mce_64.c
View file

@ -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;
}