Re: [discuss] [OOPS] powernow on smp dual core amd64

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On Fri, 2005-06-10 at 18:53 +0200, Andi Kleen wrote:
> On Thu, Jun 09, 2005 at 04:46:19PM -0700, Tom Duffy wrote:
> > Got this panic when I recently upgraded my BIOS so that it supports k8
> > powernow on SMP dual-core.
> 
> 2.6.12-rc has a dual core aware powernow k8 driver.

Despite the name of kernel, it is based off of 2.6.12-rc6.

Here is the panic on bootup.

Unable to handle kernel NULL pointer dereference at 0000000000000024 RIP:
<ffffffff8011dadc>{query_current_values_with_pending_wait+60}
PGD 3f255067 PUD 7fe7e067 PMD 0
Oops: 0002 [1] SMP
CPU 1
Modules linked in: mptscsih(U) mptbase(U) sd_mod scsi_mod
Pid: 33, comm: events/7 Not tainted 2.6.11-1.1381_FC5smp
RIP: 0010:[<ffffffff8011dadc>]  sdb1 sdb2
<ffffffff8011dadc>{query_current_values_with_pending_wait+60}
RSP: 0018:ffff81007fd9fdc8  EFLAGS: 00010202
RAX: 000000000000000e RBX: 0000000000000000 RCX: 00000000c0010042
RDX: 0000000000000008 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff81007fd9e000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000080
R13: 0000000000000000 R14: 0000000000000292 R15: ffffffff80112950
FS:  00000000005a5858(0000) GS:ffffffff8050ec00(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000000000024 CR3: 000000007fd76000 CR4: 00000000000006e0
Process events/7 (pid: 33, threadinfo ffff81007fd9e000, task ffff81007fd43070)
Stack: 0000000000000000 ffffffff8011e0b1 0000000000000001 ffff81007fa02d10
       ffff81007fa02d40 ffffffff802e6f23 0000000000000000 0000000000000003
       0000000000000001 0000000000000020
Call Trace:<ffffffff8011e0b1>{powernowk8_get+129} <ffffffff802e6f23>{cpufreq_get+115}
       <ffffffff8011298a>{handle_cpufreq_delayed_get+58} <ffffffff8014b9dc>{worker_thread+476}
       <ffffffff80134710>{default_wake_function+0} <ffffffff801326a3>{__wake_up_common+67}
       <ffffffff8014b800>{worker_thread+0} <ffffffff80150469>{kthread+217}
       <ffffffff80135c90>{schedule_tail+64} <ffffffff8010f76b>{child_rip+8}
       <ffffffff8011d680>{flat_send_IPI_mask+0} <ffffffff80150390>{kthread+0}
       <ffffffff8010f763>{child_rip+0}

Code: 89 47 24 89 57 20 31 c0 48 83 c4 08 c3 66 66 66 90 66 66 90
RIP <ffffffff8011dadc>{query_current_values_with_pending_wait+60} RSP <ffff81007fd9fdc8>
CR2: 0000000000000024
 <3>Debug: sleeping function called from invalid context at include/linux/rwsem.h:43
in_atomic():0, irqs_disabled():1

Call Trace:<ffffffff8013abc5>{profile_task_exit+21} <ffffffff8013bfe2>{do_exit+34}
       <ffffffff80267378>{do_unblank_screen+40} <ffffffff80124286>{do_page_fault+1926}
       <ffffffff8035c032>{thread_return+0} <ffffffff8035c084>{thread_return+82}
       <ffffffff8013433d>{activate_task+141} <ffffffff80112950>{handle_cpufreq_delayed_get+0}
       <ffffffff8010f5b5>{error_exit+0} <ffffffff80112950>{handle_cpufreq_delayed_get+0}
       <ffffffff8011dadc>{query_current_values_with_pending_wait+60}
       <ffffffff8011e0b1>{powernowk8_get+129} <ffffffff802e6f23>{cpufreq_get+115}
       <ffffffff8011298a>{handle_cpufreq_delayed_get+58} <ffffffff8014b9dc>{worker_thread+476}
       <ffffffff80134710>{default_wake_function+0} <ffffffff801326a3>{__wake_up_common+67}
       <ffffffff8014b800>{worker_thread+0} <ffffffff80150469>{kthread+217}
       <ffffffff80135c90>{schedule_tail+64} <ffffffff8010f76b>{child_rip+8}
       <ffffffff8011d680>{flat_send_IPI_mask+0} <ffffffff80150390>{kthread+0}
       <ffffffff8010f763>{child_rip+0}

-tduffy

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