From b2ff457b09554813a7df9e0cd30d5a169a257419 Mon Sep 17 00:00:00 2001 From: Ben Collins Date: Sun, 15 Jul 2007 23:40:11 -0700 Subject: RTC: Ratelimit "lost interrupts" message We gets lots of these when the kernel is running on a hypervisor. Zach says "a guest kernel trying to get high frequency RTC will also be inaccurate, and inevitably will have unhidable interrupt lateness." Signed-off-by: Ben Collins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/rtc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c index 20380a2c4dee..22cf7aa56cc4 100644 --- a/drivers/char/rtc.c +++ b/drivers/char/rtc.c @@ -1159,7 +1159,8 @@ static void rtc_dropped_irq(unsigned long data) spin_unlock_irq(&rtc_lock); - printk(KERN_WARNING "rtc: lost some interrupts at %ldHz.\n", freq); + if (printk_ratelimit()) + printk(KERN_WARNING "rtc: lost some interrupts at %ldHz.\n", freq); /* Now we have new data */ wake_up_interruptible(&rtc_wait); -- cgit v1.2.3