linux-kernel - Re: 3.10-rc1 system starts regular boot when waking from s2ram

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Message-ID: <20130517123008.GF5048@dhcp22.suse.cz>
Date:	Fri, 17 May 2013 14:30:08 +0200
From:	Michal Hocko <mhocko@...e.cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	"H. Peter Anvin" <hpa@...ux.intel.com>, linux-pm@...r.kernel.org,
	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	LKML <linux-kernel@...r.kernel.org>,
	Fernando Luis Vázquez Cao 
	<fernando@....ntt.co.jp>, x86@...nel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: 3.10-rc1 system starts regular boot when waking from s2ram

On Fri 17-05-13 14:23:51, Rafael J. Wysocki wrote:
> On Friday, May 17, 2013 02:09:30 PM Michal Hocko wrote:
> > On Fri 17-05-13 14:11:26, Rafael J. Wysocki wrote:
> > > On Friday, May 17, 2013 09:54:46 AM Michal Hocko wrote:
> > > > On Wed 15-05-13 11:56:08, Michal Hocko wrote:
> > > > > OK, I have bisected it to 78d77df7 (x86-64, init: Do not set NX bits on
> > > > > non-NX capable hardware). Reverting the patch on top of 3.10-rc1 fixes
> > > > > the issue for me and the machine resumes just fine.
> > > > > 
> > > > > Let's add involved people to the CC.
> > > > > 
> > > > > The original message with the confing and dmesg is bellow.
> > > > 
> > > > Anybody had chance to look at this? I am quite surprised that something
> > > > that is in init code might influence resume from suspend path. Or is it
> > > > just a side effect of some other changes in that area?
> > > > 
> > > > <goes and checks the latest 3.9 stable which has the backport of the patch>
> > > > 
> > > > Yes the latest stable is affected as well!
> > > 
> > > Well, I suppose there will be more response if you send a revert request to
> > > Linus.
> > 
> > Maybe the patch should be reverted in the stable tree right now
> 
> No, it doesn't work like that.  It won't be reverted in -stable before it is
> reverted in the Linus' tree.
> 
> > - I am not sure about all the consequences as from reading the changelog
> > I do not understand which bug the patch is supposed to fix.
> 
> That really doesn't matter.  If it breaks things, it is a revert candidate
> regardless.

OK, if there is no progress on this I will send the revert during the
weekend. It doesn't seem that many people would be affected ATM.

-- 
Michal Hocko
SUSE Labs
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