x86, mce: replace machine check events logged interval with ratelimit
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>
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1 changed files with 5 additions and 6 deletions
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@ -28,6 +28,7 @@
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#include <linux/kdebug.h>
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#include <linux/kobject.h>
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#include <linux/sysfs.h>
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#include <linux/ratelimit.h>
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#include <asm/processor.h>
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#include <asm/msr.h>
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#include <asm/mce.h>
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@ -488,11 +489,11 @@ static DECLARE_WORK(mce_trigger_work, mce_do_trigger);
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*/
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int mce_notify_user(void)
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{
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/* Not more than two messages every minute */
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static DEFINE_RATELIMIT_STATE(ratelimit, 60*HZ, 2);
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clear_thread_flag(TIF_MCE_NOTIFY);
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if (test_and_clear_bit(0, ¬ify_user)) {
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static unsigned long last_print;
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unsigned long now = jiffies;
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wake_up_interruptible(&mce_wait);
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/*
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@ -503,10 +504,8 @@ int mce_notify_user(void)
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if (trigger[0] && !work_pending(&mce_trigger_work))
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schedule_work(&mce_trigger_work);
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if (time_after_eq(now, last_print + (check_interval*HZ))) {
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last_print = now;
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if (__ratelimit(&ratelimit))
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printk(KERN_INFO "Machine check events logged\n");
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}
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return 1;
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}
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