Re: [PATCH] hrtimer, add expiry time overflow check in hrtimer_interrupt

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On Mon, Apr 08, 2013 at 04:34:26PM -0400, Prarit Bhargava wrote:
> 
> 
> On 04/08/2013 04:19 PM, John Stultz wrote:
> > On 04/08/2013 05:47 AM, Prarit Bhargava wrote:
> 
> >>
> >> A simple check for an overflow can resolve this problem.  Using KTIME_MAX
> >> instead of the overflow value will result in the hrtimer function being run,
> >> and the reprogramming of the timer after that.
> >>
> >> Signed-off-by: Prarit Bhargava <prarit@xxxxxxxxxx>
> >> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> >> Cc: John Stultz <john.stultz@xxxxxxxxxx>
> > 
> > Prarit: Should this be tagged for -stable?
> 
> John,
> 
> Yes, this should go to -stable.  cc'd.
> 
Hi,

I am a bit surprised that this patch has not found its way into mainline yet,
as everyone seems to agree that it is a candidate for -stable.

I hit this problem very reliably (ie with each boot) with 3.8.x on systems
which have no RTC and run systemd. Seen with Freescale P5040 as well as
a Broadcom MIPS based system.

Guenter
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