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From: Thomas Gleixner <tglx@linutronix.de>
To: "Arve Hjønnevåg" <arve@android.com>
Cc: linux-kernel@vger.kernel.org, mingo@redhat.com, hpa@zytor.com,
	john.stultz@linaro.org, arnd@arndb.de,
	linux-tip-commits@vger.kernel.org
Subject: Re: [tip:timers/core] time: Add timekeeping_inject_sleeptime
Date: Sat, 30 Apr 2011 02:23:54 +0200 (CEST)	[thread overview]
Message-ID: <alpine.LFD.2.02.1104300220040.3005@ionos> (raw)
In-Reply-To: <BANLkTin12hcs1Q=4E4REdF_-zn08EJXzvw@mail.gmail.com>

[-- Attachment #1: Type: TEXT/PLAIN, Size: 725 bytes --]

On Fri, 29 Apr 2011, Arve Hjønnevåg wrote:
> On Fri, Apr 29, 2011 at 10:31 AM, tip-bot for John Stultz
> <john.stultz@linaro.org> wrote:
> > -       set_normalized_timespec(&time,
> > -                               newtime + delta.tv_sec,
> > -                               (NSEC_PER_SEC >> 1) + delta.tv_nsec);
> > -       do_settimeofday(&time);
> > +       /* subtract kernel time between rtc_suspend to rtc_resume */
> > +       time = timespec_sub(time, timespec_sub(newts, oldts));
> 
> The delta you got from the rtc can be almost a second to long or
> short. Do you do anything to prevent these errors from accumulating?

By using the the magic crystal ball to avoid it or what do you have in
mind ?

Thanks,

	tglx

  reply	other threads:[~2011-04-30  0:24 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <tip-304529b1b6f8612ccbb4582e997051b48b94f4a4@git.kernel.org>
2011-04-29 23:28 ` Arve Hjønnevåg
2011-04-30  0:23   ` Thomas Gleixner [this message]
2011-04-30  1:12     ` Arve Hjønnevåg
2011-04-30  1:57       ` John Stultz
2011-04-30  3:30         ` Arve Hjønnevåg
2011-04-30  0:24   ` John Stultz
2011-04-30  1:07     ` Arve Hjønnevåg

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