linux-kernel - Re: 2.6.29-rc1: thinkpad problems during resume

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Message-Id: <200901171546.15987.borntraeger@de.ibm.com>
Date:	Sat, 17 Jan 2009 15:46:15 +0100
From:	Christian Borntraeger <borntraeger@...ibm.com>
To:	Pavel Machek <pavel@...e.cz>
Cc:	Jeff Chua <jeff.chua.linux@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	kernel list <linux-kernel@...r.kernel.org>,
	Mike Travis <travis@....com>, Ingo Molnar <mingo@...e.hu>
Subject: Re: 2.6.29-rc1: thinkpad problems during resume

Am Freitag 16 Januar 2009 schrieb Pavel Machek:
> Hi!
>
> > >> > Please let me know if that helped.
> > >>
> > >> I tested rc1+ these two reverts yesterday on my T61p. Doesnt work.
> > >> There must be at least one more patch that broke S2R on my thinkpad.
> > >> In fact, it is cpu hotplug that is broken (unplug works).
> > >
> > > I reproduced that: echo 0 > online works, echo 1 > online hangs. Will
> > > compile SMP-less kernel to verify that there are no more problems...

I made some progress on my T61p. git from yesterday + a revert of
commit e39ad415ac15116df213dfa2aa2a4f1b0857af9c
Author: Mike Travis <travis@....com>
Date:   Sun Jan 4 05:18:10 2009 -0800

    cpumask: use work_on_cpu in acpi-cpufreq.c for read_measured_perf_ctrs

makes cpu hotplug working again. Resume from suspend to ram is still broken on 
my Thinkpad. Looks like there is yet another patch to find....

Ingo, Mike: reverting e39ad415ac15116df213dfa2aa2a4f1b0857af9c fixes cpu 
hotplug on my thinkpad. Any idea how to proceed? Should we revert that patch 
in Linus git until we know what was wrong?
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