Re: Regression in 2.6.27-rc2 in acpi_processor_init()

Re: Regression in 2.6.27-rc2 in acpi_processor_init()

[Rafael J. Wysocki]

[Adding CCs]

On Friday, 8 of August 2008, Langsdorf, Mark wrote:
> I got a regression when updated from 2.6.27-rc1 ro
> 2.6.27-rc2.  The noticeable symptom is the powernow-k8
> driver stopped working because the call to 
> acpi_processor_register_performance() is returning
> -EINVAL.
> 
> Digging into the code a bit more, that's occurring
> because acpi_processor_ppc_status is not set.
> That should be set in acpi_processor_init(), but
> that function is failing to register the ACPI
> processor driver.
> 
> I've dug through the code and can't see why 
> that call would fail.  It doesn't look like there
> were any changes between 2.6.27-rc1 and 2.6.27-rc2,
> but I may have missed something.
> 
> Any advice or suggestions in debugging this 
> appreciated.
> 
> -Mark Langsdorf
> Operating System Research Center
> AMD

Re: Regression in 2.6.27-rc2 in acpi_processor_init()

[Dave Jones]

On Fri, Aug 08, 2008 at 11:02:10PM +0200, Rafael J. Wysocki wrote:
 > [Adding CCs]
 > 
 > On Friday, 8 of August 2008, Langsdorf, Mark wrote:
 > > I got a regression when updated from 2.6.27-rc1 ro
 > > 2.6.27-rc2.  The noticeable symptom is the powernow-k8
 > > driver stopped working because the call to 
 > > acpi_processor_register_performance() is returning
 > > -EINVAL.
 > > 
 > > Digging into the code a bit more, that's occurring
 > > because acpi_processor_ppc_status is not set.
 > > That should be set in acpi_processor_init(), but
 > > that function is failing to register the ACPI
 > > processor driver.
 > > 
 > > I've dug through the code and can't see why 
 > > that call would fail.  It doesn't look like there
 > > were any changes between 2.6.27-rc1 and 2.6.27-rc2,
 > > but I may have missed something.
 > > 
 > > Any advice or suggestions in debugging this 
 > > appreciated.

a1531acd43310a7e4571d52e8846640667f4c74b perhaps related ?

	Dave

-- 
http://www.codemonkey.org.uk

Re: Regression in 2.6.27-rc2 in acpi_processor_init()

[Zhao Yakui]

On Fri, 2008-08-08 at 23:02 +0200, Rafael J. Wysocki wrote:
> [Adding CCs]
> 
Hi, Mark
   Will you please attach the output of acpidump on bug 11287?
   Of course it will be great if you can enable CONFIG_ACPI_DEBUG and
CONFIG_CPUFREQ_DEBUG in kernel configuration  and boot the system with
the option of "cpufreq.debug=7 acpi.debug_layer=0x01010000
acpi.debug_level=0x17".
   After the system is booted, please attach the output of dmesg.
   Please do the above test on both kernel 2.6.27-rc1 and 2.6.27-rc2.

Thanks.
> On Friday, 8 of August 2008, Langsdorf, Mark wrote:
> > I got a regression when updated from 2.6.27-rc1 ro
> > 2.6.27-rc2.  The noticeable symptom is the powernow-k8
> > driver stopped working because the call to 
> > acpi_processor_register_performance() is returning
> > -EINVAL.
> >
> > Digging into the code a bit more, that's occurring
> > because acpi_processor_ppc_status is not set.
> > That should be set in acpi_processor_init(), but
> > that function is failing to register the ACPI
> > processor driver.
> > 
> > I've dug through the code and can't see why 
> > that call would fail.  It doesn't look like there
> > were any changes between 2.6.27-rc1 and 2.6.27-rc2,
> > but I may have missed something.
> > 
> > Any advice or suggestions in debugging this 
> > appreciated.
> > 
> > -Mark Langsdorf
> > Operating System Research Center
> > AMD
> 
> 
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RE: Regression in 2.6.27-rc2 in acpi_processor_init()

[Langsdorf, Mark]

>    Will you please attach the output of acpidump on bug 11287?
>    Of course it will be great if you can enable CONFIG_ACPI_DEBUG and
> CONFIG_CPUFREQ_DEBUG in kernel configuration  and boot the system with
> the option of "cpufreq.debug=7 acpi.debug_layer=0x01010000
> acpi.debug_level=0x17".
>    After the system is booted, please attach the output of dmesg.
>    Please do the above test on both kernel 2.6.27-rc1 and 2.6.27-rc2.

False alarm.  I had acpi=off set in my command line for some
reason.

Thanks for the offer of help.

-Mark Langsdorf
Operating System Research Center
AMD