linux-kernel - Re: [linux-pm] e978aa7d (cpuidle: Move dev->last

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Message-Id: <201111122313.26968.rjw@sisk.pl>
Date:	Sat, 12 Nov 2011 23:13:26 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Ferenc Wagner <wferi@...f.hu>
Cc:	linux-pm@...ts.linux-foundation.org,
	Deepthi Dharwar <deepthi@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [linux-pm] e978aa7d (cpuidle: Move dev->last_residency update...) broke suspend

On Saturday, November 12, 2011, Ferenc Wagner wrote:
> "Rafael J. Wysocki" <rjw@...k.pl> writes:
> 
> > On Saturday, November 12, 2011, Ferenc Wagner wrote:
> >> Hi,
> >> 
> >> Since e978aa7d (cpuidle: Move dev->last_residency update to driver
> >> enter routine; remove dev->last_state) my ThinkPad R50e can't suspend
> >> anymore, it just freezes instead.  I controlled git bisect by booting
> >> with break=top and issuing 'echo mem >/sys/power/state'.  My config is
> >> attached.
> >
> > What's the output of "cat /sys/devices/system/cpu/cpuidle/current_driver" ?
> 
> acpi_idle.
> 
> Your patch (ACPI / cpuidle: Remove acpi_idle_suspend) fixes the problem
> for me.  Amazing turnaround, really!

Well, I could reproduce the problem on one of my machines, so it wasn't
that difficult.

Thanks,
Rafael
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