From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: Linux 3.4 dom0 kernel error loading xen-acpi-processor: Input/output error Date: Wed, 6 Mar 2013 19:29:34 -0500 Message-ID: <20130307002934.GB12421@phenom.dumpdata.com> References: <20130221092434.GQ8912@reaktio.net> <20130221122913.GC6647@phenom.dumpdata.com> <20130224220524.GY8912@reaktio.net> <20130303185347.GH8912@reaktio.net> <20130305174515.GA24062@phenom.dumpdata.com> <20130306204139.GS8912@reaktio.net> <20130306210127.GT8912@reaktio.net> <20130306212147.GU8912@reaktio.net> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Content-Disposition: inline In-Reply-To: <20130306212147.GU8912@reaktio.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= Cc: David Vrabel , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On Wed, Mar 06, 2013 at 11:21:47PM +0200, Pasi K=E4rkk=E4inen wrote: > On Wed, Mar 06, 2013 at 11:01:27PM +0200, Pasi K=E4rkk=E4inen wrote: > > On Wed, Mar 06, 2013 at 10:41:39PM +0200, Pasi K=E4rkk=E4inen wrote: > > > On Tue, Mar 05, 2013 at 12:45:15PM -0500, Konrad Rzeszutek Wilk wrote: > > > > > = > > > > > .. and thus ACPI_SUCCESS(status) is false. _PCT was not found. > > > > > Any ideas why the Performance Control stuff can't be found? = > > > > = > > > > = > > > > No, but I usually do one more thing to check my assumptions. I extr= act > > > > the SSDT and DSDT: > > > > = > > > > cat /sys/firmware/acpi/DSDT > /tmp/dsdt > > > > > > > = > > > In dom0: > > > = > > > cat: /sys/firmware/acpi/DSDT: No such file or directory > > > = > > > # ls /sys/firmware/acpi/ > > > interrupts pm_profile tables > > > > > = > > Actually the correct path is: /sys/firmware/acpi/tables/DSDT > > So the acpi tables are there. > > = > > .. but the problem is there's no _PCT info in them. > > = > = > .. so on which hardware is xen-acpi-processor driver required? = > = > Is the actual problem that I don't have _PCT because it's not required/su= pported on my hw, > and thus I don't need the whole xen-acpi-processor driver? = > = > I checked the Xeon 5600 CPU, and also Ivy Bridge i7, and there's no _PCT = on either one.. I always forget which of _P* are important. I think _PPC, _PSS and _PCD are the crucial ones. The _PCT is the thermal one - which I think are usual= ly found on laptops. In your case then .. lets go back to the start - the driver failed with -EIO and it was v3.4.x kernel? Now that I've figured out the regression with v3.9 I can take a look at this. > = > -- Pasi > =