Re: [PATCH 0/5 v2] Fixes for leapsecond expiring early ABS_TIME CLOCK_REALTIME timers

From: Prarit Bhargava
Date: Fri Jun 12 2015 - 11:03:00 EST




On 06/12/2015 10:59 AM, Dave Jones wrote:
> On Fri, Jun 12, 2015 at 10:55:57AM -0400, Prarit Bhargava wrote:
>
> > > > This series has only had limited testing, so I wanted to send
> > > > it out for initial review and comment. Folks can grab this tree
> > > > via git for testing here:
> > > > https://git.linaro.org/people/john.stultz/linux.git dev/early-leap-timer
> > >
> > > Any idea how far back this reaches ? Ie, which longterm stable releases
> > > might be affected by this ?
> >
> > Likely occurs in any kernel after NOHZ was introduced.
>
> At least on 3.14, it seems to happen even if NOHZ is disabled.

Ouch. :(

I wonder if we've every synched the tick edge with the second edge. Your test
implies the answer is "no".

P.
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