linux-kernel - Re: Regression in 2.6.27-rc2 in acpi_processor

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Message-ID: <20080808210619.GA4655@redhat.com>
Date:	Fri, 8 Aug 2008 17:06:19 -0400
From:	Dave Jones <davej@...hat.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	"Langsdorf, Mark" <mark.langsdorf@....com>,
	lkml <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Andi Kleen <andi@...stfloor.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Renninger <trenn@...e.de>
Subject: Re: Regression in 2.6.27-rc2 in acpi_processor_init()

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

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