From mboxrd@z Thu Jan 1 00:00:00 1970 From: Len Brown Subject: RE: Method execution failed Date: 06 Aug 2004 14:31:52 -0400 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <1091817106.2297.518.camel@dhcppc4> References: <37F890616C995246BE76B3E6B2DBE055019E92C0@orsmsx403.amr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <37F890616C995246BE76B3E6B2DBE055019E92C0-sBd4vmA9Se5Qxe9IK+vIArfspsVTdybXVpNB7YpNyf8@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Robert Moore Cc: Alex Williamson , ACPI Developers List-Id: linux-acpi@vger.kernel.org Bob speaks the truth. Alex, you want to be running the latest 2.6 ACPI patch from here: http://linux-acpi.bkbits.net/ or here: http://ftp.kernel.org/pub/linux/kernel/people/lenb/acpi/patches/release/ or run the -mm patch which includes a pretty recent bk-acpi pull. thanks, -Len On Fri, 2004-08-06 at 13:30, Moore, Robert wrote: > A later version of acpi fixed the init_globals issue, static init only > for the runtime options > > > > -----Original Message----- > > From: Alex Williamson [mailto:alex.williamson-VXdhtT5mjnY@public.gmane.org] > > Sent: Friday, August 06, 2004 10:27 AM > > To: Moore, Robert > > Cc: acpi-devel > > Subject: RE: [ACPI] Method execution failed > > > > On Fri, 2004-08-06 at 10:07 -0700, Moore, Robert wrote: > > > This is a bug in the ASL/AML for this machine. Methods that are > > > declared "NotSerialized" are forbidden from creating objects within > the > > > namespace (or at least forbidden from creating names that will > clash). > > > > Argh, I'll bug our firmware guys it that's the problem. > > > > > There is a fix to the ACPI code that detects this problem and > changes > > > "NotSerialized" to "Serialized" on the fly. There is also a runtime > > > option to force all control methods to be "Serialized". > > > > I tried adding acpi_serialize to my boot options, I see "ACPI: > > serialize enabled" in dmesg. However, it still breaks when calling > > methods concurrently. Looks like acpi_ut_init_globals() is likely > > reseting later on. How do I enable the on-the-fly checking? Thanks > for > > the quick response! > > > > Alex > > > > > > > > > -----Original Message----- > > > > From: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org [mailto:acpi-devel- > > > > admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org] On Behalf Of Alex Williamson > > > > Sent: Friday, August 06, 2004 9:48 AM > > > > To: acpi-devel > > > > Subject: [ACPI] Method execution failed > > > > > > > > > > > > I think there's a locking issue w/ namespace for concurrent > calls > > > to > > > > acpi_evaluate_object(). FWIW, these concurrent calls are coming > in > > > > through my acpi sysfs patch, so it could be a bug in that code. > If I > > > > serialize calls into acpi_evaluate_object(), it works fine, but I > > > don't > > > > see a global lock for this, so I think the problem is more > general. > > > If > > > > I make lots of calls to evaluate the same _BBN object, I start > seeing > > > > these: > > > > > > > > ACPI-0279: *** Error: Looking up [LBAS] in namespace, > > > AE_ALREADY_EXISTS > > > > ACPI-1133: *** Error: Method execution failed [\LBA_.BBN_] (Node > > > > e00000407fd > > > > > > > > This starts at acpi_ds_load1_begin_op() doing a path lookup, > > > presumably > > > > expecting not to find the path with flag ACPI_NS_ERROR_IF_FOUND. > The > > > > AML for the method is: > > > > > > > > 0000000: a45c 2e4c 4241 5f42 424e 5f5e 5f55 4944 .\.LBA_BBN_^_UID > > > > > > > > The first part of the _SB/LBA/BBN_ AML looks like this: > > > > > > > > 0000000: 084c 4241 5311 030a 408a 4c42 4153 0056 .LBAS...@.LBAS.V > > > > 0000010: 414c 448a 4c42 4153 0a04 4c46 4c47 8a4c ALD.LBAS..LFLG.L > > > > ... > > > > > > > > The LBA/BBN_ method appears to make an object named LBAS. When > > > calling > > > > this multiple times, each instance wants to not find this object > and > > > > then create it. However, the namespace lock is given up around > method > > > > execution, so it seems we have some races. Am I completely mis- > > > > interpreting the problem, or does this sound plausible? I don't > > > really > > > > know how to read AML, so this is just a guess. Do we need to be > more > > > > stringent on locking namespace, or is there a bug in the AML I'm > > > > calling? Thanks, > > > > > > > > Alex > > > > > > > > -- > > > > Alex Williamson HP Linux & Open Source > Lab > > > > > -- > > Alex Williamson HP Linux & Open Source Lab > > > > ------------------------------------------------------- > This SF.Net email is sponsored by OSTG. Have you noticed the changes on > Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now, > one more big change to announce. We are now OSTG- Open Source Technology > Group. Come see the changes on the new OSTG site. www.ostg.com > _______________________________________________ > Acpi-devel mailing list > Acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org > https://lists.sourceforge.net/lists/listinfo/acpi-devel ------------------------------------------------------- This SF.Net email is sponsored by OSTG. Have you noticed the changes on Linux.com, ITManagersJournal and NewsForge in the past few weeks? Now, one more big change to announce. We are now OSTG- Open Source Technology Group. Come see the changes on the new OSTG site. www.ostg.com