linux-kernel - Re: [PATCH RFC V2 3/6] time: keep track of the pending utc/tai threshold

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Message-ID: <20120530061931.GA3072@netboy.at.omicron.at>
Date:	Wed, 30 May 2012 08:19:31 +0200
From:	Richard Cochran <richardcochran@...il.com>
To:	John Stultz <johnstul@...ibm.com>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH RFC V2 3/6] time: keep track of the pending utc/tai
 threshold

On Tue, May 29, 2012 at 10:56:18PM -0700, John Stultz wrote:
> On 05/29/2012 10:11 PM, Richard Cochran wrote:
> >On Tue, May 29, 2012 at 06:49:30PM -0700, John Stultz wrote:
> >>diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
> >>index 6e46cac..81c76a9 100644
> >>--- a/kernel/time/timekeeping.c
> >>+++ b/kernel/time/timekeeping.c
> >>@@ -962,6 +962,7 @@ static cycle_t logarithmic_accumulation(cycle_t offset, int shift)
> >>  		timekeeper.xtime.tv_sec++;
> >>  		leap = second_overflow(timekeeper.xtime.tv_sec);
> >>  		timekeeper.xtime.tv_sec += leap;
> >>+		timekeeper.wall_to_monotonic.tv_sec -= leap;
> >Don't you need this in update_wall_time() too?
> Yep. Good point.

Okay, so I can confirm that this fixes the CLOCK_MONOTONIC timer issue
during a leap second.

Thanks,
Richard
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