linux-kernel - Re: [patch 3/3] clockevents: Fix resume logic

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Message-Id: <200705092253.49896.rjw@sisk.pl>
Date:	Wed, 9 May 2007 22:53:49 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	tglx@...utronix.de
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	John Stultz <johnstul@...ibm.com>, linux-acpi@...r.kernel.org
Subject: Re: [patch 3/3] clockevents: Fix resume logic - updated version

On Wednesday, 9 May 2007 22:45, Thomas Gleixner wrote:
> On Wed, 2007-05-09 at 20:36 +0200, Rafael J. Wysocki wrote:
> > Well, apparently, not in -mm2:
> > 
> > rafael@...ercik:~/src/mm/linux-2.6.21-mm2> grep -r -I -l 'timekeeping_resume' *
> > kernel/time/timekeeping.c
> > rafael@...ercik:~/src/mm/linux-2.6.21-mm2> grep clocksource_resume kernel/time/timekeeping.c
> > rafael@...ercik:~/src/mm/linux-2.6.21-mm2>
> 
> Andrew dropped the patch because it did not work on his jinxed VAIO, but
> he debugged with the patch applied.

I see.

In that case, since timekeeping_resume() is called via sysdev_resume, then it's
executed before acpi_leave_sleep_state() and may very well interfere with the
ACPI methods executed from there, depending on what's happening in the
cs->resume() callbacks in clocksource_resume().

Greetings,
Rafael
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