From: Pavel Machek <pavel@ucw.cz>
To: Mikael Pettersson <mikpe@csd.uu.se>
Cc: Bernard Blackham <bernard@blackham.com.au>,
Pavel Machek <pavel@ucw.cz>, Shaw <shawv@comcast.net>,
linux-kernel@vger.kernel.org
Subject: Re: Screwy clock after apm suspend
Date: Tue, 11 Jan 2005 14:10:19 +0100 [thread overview]
Message-ID: <20050111131019.GA1324@openzaurus.ucw.cz> (raw)
In-Reply-To: <16867.51258.916944.195917@alkaid.it.uu.se>
Hia
> > Looking harder, in arch/i386/kernel/apm.c the system time is also
> > saved and restored in a very similar way to timer_suspend/resume.
> > Would this account for the time drift in APM mode? (sleep time being
> > accounted for twice?)
>
> No, apm.c's update to xtime is absolute, just like time.c's.
> Doing both is pointless but not harmful. (I've already tried
> with apm.c's xtime update commented out, but the time-warp
> bug remained.)
>
> My 0.02 SEK says it's the jiffies update that's broken.
Okay, can you
* kill jiffie update (x86-64, too)
* remove apm.c variant
* test it (or make someone test it) with apm?
I now see the drift with acpi, too :-(. I can do the acpi testing...
--
64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms
next prev parent reply other threads:[~2005-01-11 13:11 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-07 18:08 Screwy clock after apm suspend Shaw
2005-01-09 22:47 ` Pavel Machek
2005-01-10 2:15 ` Alex Romosan
2005-01-10 7:28 ` Shaw
2005-01-10 7:44 ` bernard
2005-01-10 10:57 ` Pavel Machek
2005-01-10 17:48 ` Bernard Blackham
2005-01-11 0:14 ` Pavel Machek
2005-01-11 1:10 ` Nigel Cunningham
2005-01-11 3:12 ` Pavel Machek
2005-01-11 1:16 ` Bernard Blackham
2005-01-11 3:21 ` Pavel Machek
2005-01-11 12:36 ` Mikael Pettersson
2005-01-11 13:10 ` Pavel Machek [this message]
2005-01-11 14:15 ` Mikael Pettersson
2005-01-11 20:18 ` Pavel Machek
2005-01-11 3:13 ` Stephen Rothwell
2005-01-11 3:19 ` Pavel Machek
2005-01-11 12:32 ` Mikael Pettersson
-- strict thread matches above, loose matches on Subject: below --
2005-01-15 18:30 Mikael Pettersson
2005-01-16 19:47 ` Alex Romosan
2004-12-29 11:38 Mikael Pettersson
2005-01-03 17:34 ` Pavel Machek
2004-12-29 0:29 Brannon Klopfer
2004-12-29 1:18 ` Nigel Cunningham
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