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From: Mikael Pettersson <mikpe@csd.uu.se>
To: Pavel Machek <pavel@ucw.cz>
Cc: Mikael Pettersson <mikpe@csd.uu.se>,
	Bernard Blackham <bernard@blackham.com.au>,
	Shaw <shawv@comcast.net>,
	linux-kernel@vger.kernel.org
Subject: Re: Screwy clock after apm suspend
Date: Tue, 11 Jan 2005 15:15:29 +0100	[thread overview]
Message-ID: <16867.57217.358323.945559@alkaid.it.uu.se> (raw)
In-Reply-To: <20050111131019.GA1324@openzaurus.ucw.cz>

Pavel Machek writes:
 > 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...

I'm away from my APM laptop until Friday, but I'll do this test then.

/Mikael

  reply	other threads:[~2005-01-11 14:15 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
2005-01-11 14:15                   ` Mikael Pettersson [this message]
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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