From mboxrd@z Thu Jan 1 00:00:00 1970 From: yakui_zhao Subject: Re: warning at powernowk8_cpu_init() Date: Mon, 30 Mar 2009 10:38:20 +0800 Message-ID: <1238380700.3625.17.camel@localhost.localdomain> References: <49CF4DDB.8050607@gmail.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from mga11.intel.com ([192.55.52.93]:48399 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755753AbZC3Ch0 (ORCPT ); Sun, 29 Mar 2009 22:37:26 -0400 In-Reply-To: <49CF4DDB.8050607@gmail.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Roel Kluin Cc: "lenb@kernel.org" , "linux-acpi@vger.kernel.org" On Sun, 2009-03-29 at 18:30 +0800, Roel Kluin wrote: > Hi, > > I got this warning during boot: > > powernow-k8: Found 1 AMD Athlon(tm) 64 X2 Dual Core Processor 5000+ processors (2 cpu cores) (version 2.20.00) > ------------[ cut here ]------------ > WARNING: at /home/roel/dnld/src/kernel/git/linux-2.6/arch/x86/kernel/cpu/cpufreq/powernow-k8.c:1254 powernowk8_cpu_init+0x500/0xad0() > Hardware name: MS-7369 > [Firmware Bug]: powernow-k8: Your BIOS does not provide ACPI _PSS objects in a way that Linux understands. Please report this to the Linux ACPI maintainers and complain to your BIOS vendor. Hi, From the log it seems that there is no _PSS object , which is required by the powernow-k8 cpufreq. IMO the warning message is reasonable. We have seen this issue on a lot of machines based on AMD platforms. And this issue had better be fixed by BIOS upgrading. > Modules linked in: > Pid: 1, comm: swapper Not tainted 2.6.29-smp #1 Is the following dump stack message reported on vanilla kernel ? Or is it reported by adding the function of dump_stack? Thanks. > Call Trace: > [] warn_slowpath+0x86/0xa0 > [] ? acpi_ns_get_node+0x7a/0x84 > [] ? acpi_ns_get_node+0x7a/0x84 > [] ? default_wake_function+0x0/0x10 > [] ? task_rq_lock+0x66/0x90 > [] ? acpi_get_handle+0x6c/0x8e > [] ? acpi_processor_register_performance+0x397/0x3b2 > [] ? _cond_resched+0x22/0x50 > [] ? kmem_cache_alloc+0x8b/0xd0 > [] ? powernowk8_cpu_init+0x4e/0xad0 > [] powernowk8_cpu_init+0x500/0xad0 > [] ? finish_task_switch+0xaf/0xf0 > [] ? _cond_resched+0x22/0x50 > [] ? _cond_resched+0x22/0x50 > [] ? down_write+0xb/0x30 > [] ? lock_policy_rwsem_write+0x70/0xa0 > [] cpufreq_add_dev+0x1c9/0x5f0 > [] ? vt_console_print+0x0/0x2a0 > [] ? up+0x46/0x60 > [] ? release_console_sem+0x209/0x210 > [] ? task_rq_lock+0x66/0x90 > [] ? kref_get+0x37/0x60 > [] ? set_cpus_allowed_ptr+0xae/0x120 > [] sysdev_driver_register+0x75/0x120 > [] ? powernowk8_cpu_init+0x0/0xad0 > [] cpufreq_register_driver+0x86/0x140 > [] powernowk8_init+0x87/0xa0 > [] ? powernowk8_init+0x0/0xa0 > [] do_one_initcall+0x24/0x150 > [] ? create_proc_entry+0x54/0xa0 > [] ? register_irq_proc+0xa2/0xc0 > [] ? init_irq_proc+0x65/0x80 > [] kernel_init+0x122/0x180 > [] ? kernel_init+0x0/0x180 > [] kernel_thread_helper+0x7/0x1c > ---[ end trace f7b2fa9171ecaaac ]--- > dmesg and .config are attached