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

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Message-ID: <4FC5B682.4010509@us.ibm.com>
Date:	Tue, 29 May 2012 22:56:18 -0700
From:	John Stultz <johnstul@...ibm.com>
To:	Richard Cochran <richardcochran@...il.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 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.

> BTW I suggest refactoring this code (two almost identical if{} bodies)
> into a shared helper function.
>
Sounds good, although since the logic is ever so slightly different I 
might split up the pure fix and do the refactoring later so the fix is 
easier to apply to -stable branches.

thanks
-john


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