From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= Subject: Re: Linux 3.4 dom0 kernel error loading xen-acpi-processor: Input/output error Date: Fri, 15 Mar 2013 23:32:27 +0200 Message-ID: <20130315213227.GB8912@reaktio.net> References: <20130306212147.GU8912@reaktio.net> <20130307002934.GB12421@phenom.dumpdata.com> <20130307074808.GV8912@reaktio.net> <20130308202457.GA21875@phenom.dumpdata.com> <20130308221820.GE8912@reaktio.net> <20130312205118.GN8912@reaktio.net> <20130315150527.GA16632@phenom.dumpdata.com> <20130315151934.GZ8912@reaktio.net> <20130315193706.GA8912@reaktio.net> <20130315211518.GA32252@phenom.dumpdata.com> 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: <20130315211518.GA32252@phenom.dumpdata.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Konrad Rzeszutek Wilk Cc: David Vrabel , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On Fri, Mar 15, 2013 at 05:15:18PM -0400, Konrad Rzeszutek Wilk wrote: > On Fri, Mar 15, 2013 at 09:37:06PM +0200, Pasi K=E4rkk=E4inen wrote: > > On Fri, Mar 15, 2013 at 05:19:34PM +0200, Pasi K=E4rkk=E4inen wrote: > > > = > > > > I need to look back at my notes on how the _PCT, _PSS, _Pwhateverna= me > > > > work. > > > > > > > = > > > Yep. Does xen-acpi-processor driver load OK on your servers? = > > > = > > = > > I just tried Linux 3.8.3 as dom0 on the Xeon 5600 CPU and xen-acpi-proc= essor fails = > > in the same way as it fails with Linux 3.4. > > = > > I also tested on my Ivy Bridge i7 desktop, and there xen-acpi-processor= driver loads OK.. > = > And when I add some extra printks in working box I see that these calls: > = > acpi_get_handle(pr->handle, "_PCT", &handle); > acpi_get_handle(pr->handle, "_PSD", &handle); > acpi_get_handle(pr->handle, "_PSS", &handle); > = > work, yet in the SSDT and DSDT those strings don't show up? > That's weird.. then again it probably explains why I didn't see = those strings either in SSDT/DSDT on the i7 boxes. > I think this > requires some deep ACPI sorcery to figure out. On the AMD boxes they > nicely show up. > Yeah I was afraid of that ;) I've already tried simple things with acpi.debug_level=3D0xffffffff and acp= i.debug_layer=3D0xffffffff but nothing obvious so far.. I need to dig deeper.. It'd help to understand how all that SSDT/DSDT and PCT/PSD/PSS stuff is sup= posed to work.. = If you happen to have good links to read about this ACPI black magic let me= know (I'll probably regret asking for this ;) -- Pasi