linux-kernel - Re: [Bug #12667] Badness at kernel/time/timekeeping.c:98 in pmud (timekeeping

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Message-Id: <1235080040.8805.47.camel@pasglop>
Date:	Fri, 20 Feb 2009 08:47:20 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Paul Collins <paul@...ly.ondioline.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [Bug #12667] Badness at kernel/time/timekeeping.c:98 in pmud
 (timekeeping_suspended)

On Thu, 2009-02-19 at 14:00 +0100, Rafael J. Wysocki wrote:
> On Thursday 19 February 2009, Benjamin Herrenschmidt wrote:
> > On Thu, 2009-02-19 at 21:27 +1300, Paul Collins wrote:
> > > > Just for laughs I slapped together the following, which seems to do
> > > the
> > > > job, although not especially tidily.
> > > 
> > > And it doesn't even do the job.  Judging by this new trace, submitting
> > > input events from the via-pmu resume function is still too early.
> > > 
> > What's up Thomas ? We can't call gettimeofday() from a sysdev
> > suspend/resume ? That's a little bit too harsh no ?
> 
> Perhaps the ordering is wrong (ie. via-pmu resume happens bevore timekeeping
> resume)?

In this case, maybe gtod should just return the frozen time (ie, last
time at the time of suspend) rather than WARN ?

Ben.


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