linux-kernel - Re: [PATCH RFC] timekeeping: Fix clock stability with nohz

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Message-ID: <20131210112604.GQ22878@localhost>
Date:	Tue, 10 Dec 2013 12:26:04 +0100
From:	Miroslav Lichvar <mlichvar@...hat.com>
To:	John Stultz <john.stultz@...aro.org>
Cc:	linux-kernel@...r.kernel.org, Prarit Bhargava <prarit@...hat.com>,
	Richard Cochran <richardcochran@...il.com>
Subject: Re: [PATCH RFC] timekeeping: Fix clock stability with nohz

On Tue, Dec 10, 2013 at 11:20:51AM +0100, Miroslav Lichvar wrote:
> What does the following line from your patch mean?
> 
>         tick_error -= tk->xtime_interval;

Ok, I think I understand how it should work. There are two loops, the
bigadjust one is correcting only for ntp tick length and the other for
the cumulative error. I think it might work better if they were both
active at the same time instead of switching between them according to
the current ntp error.

-- 
Miroslav Lichvar
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