linux-kernel - Re: [Regression][Revert request] Excessive delay or hang during resume from system suspend due to a hrtimer commit

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Date:	Mon, 16 Jul 2012 13:15:47 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	John Stultz <johnstul@...ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Prarit Bhargava <prarit@...hat.com>, stable@...r.kernel.org,
	Andreas Schwab <schwab@...ux-m68k.org>
Subject: Re: [Regression][Revert request] Excessive delay or hang during
 resume from system suspend due to a hrtimer commit

On Mon, 16 Jul 2012, Rafael J. Wysocki wrote:

> On Monday, July 16, 2012, Thomas Gleixner wrote:
> > On Sun, 15 Jul 2012, Rafael J. Wysocki wrote:
> > > To everyone involved: the fact that this change, which was likely to introduce
> > > regressions from the look of it alone, has been pushed to Linus (an to -stable
> > > at the same time!) so late in the cycle, is seriuosly disappointing.
> > 
> > Well, we spent an massive amount of time in testing, reviewing and
> > discussion and it definitely did not break suspend/resume here.
> 
> I'm not saying that you didn't consider it thoroughly, but unfortunately you
> did overlook this particular issue, didn't you?
> 
> > This was not pushed without a lot of thoughts and in fact what you are
> > seing is another long standing bug in the timekeeping resume code,
> > which was just papered over by the incorrect handling of the clock was
> > set cases in the other parts of the system.
> > 
> > Does the following patch fix the problem for you ?
> 
> Yes, it does, thanks!
> 
> > @John: Should that clear ntp as well or is it enough to set ntp_error
> >        to 0 ?
> > 
> > /me really goes on vacation now.
> 
> So who's going to take care of the patch? :-)

I'm still packing gear. So i'll push it into timers/urgent.

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