linux-kernel - Re: Resume does not work after timekeeping change

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Message-ID: <20130420184152.GA4649@pd.tnic>
Date:	Sat, 20 Apr 2013 20:41:52 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Jiri Slaby <jslaby@...e.cz>, Ingo Molnar <mingo@...nel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <john.stultz@...aro.org>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Resume does not work after timekeeping change

On Sat, Apr 20, 2013 at 05:46:52PM +0200, Jiri Slaby wrote:
> Hi,
> 
> my machine does not wake from suspend to RAM on my box running the -next
> kernel. The last thing I see is "Disabling non-boot CPUs ...". I
> bisected it to this commit:
> 
> commit 7ec98e15aa049b7a2ca73485f31cf4f90c34e2dd
> Author: Thomas Gleixner <tglx@...utronix.de>
> Date:   Thu Feb 21 22:51:39 2013 +0000
> 
>     timekeeping: Delay update of clock->cycle_last
> 
> 
> Reverting that one on the top of -next-20130419 makes it work again.
> 
> 
> I also tried it inside a VM using suspend to disk. There, it behaves
> like it takes a minute or so to wake up. So I tried to wait on the real
> HW too, but it never resumes there.

Right, and I'm seeing it here too but it sometimes does resume after
about a minute or so and sometimes it doesn't.

Reverting the patch by hand ontop of tip/master fixes the issue here
too.

Btw, Ingo, remember how I was telling you that I'm seeing
temporary lockups with tip/master and resume issues
with the last line being "Disabling non-boot CPUs ..."
http://marc.info/?l=linux-kernel&m=136610574502492 - this commit was the
culprit.

Good job Jiri.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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