Bug 8802 - ACPI Exception (processor_throttling-0084): AE_NOT_FOUND, Evaluating _PTC [20070126]
Summary: ACPI Exception (processor_throttling-0084): AE_NOT_FOUND, Evaluating _PTC [20...
Status: CLOSED CODE_FIX
Alias: None
Product: ACPI
Classification: Unclassified
Component: Power-Thermal (show other bugs)
Hardware: All Linux
: P1 low
Assignee: Len Brown
URL:
Keywords:
: 8806 (view as bug list)
Depends on:
Blocks:
 
Reported: 2007-07-24 12:58 UTC by Daniel Viczinger
Modified: 2007-07-25 16:41 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.6.23-rc1
Subsystem:
Regression: ---
Bisected commit-id:


Attachments
patch vs 2.6.23-rc1 to remove ACPI Exceptions (4.89 KB, patch)
2007-07-24 21:34 UTC, Len Brown
Details | Diff

Description Daniel Viczinger 2007-07-24 12:58:08 UTC
Most recent kernel where this bug did not occur: 2.6.22.1
Distribution: Slackware-current
Hardware Environment: 2.4XP, 768Ram, Abit KX7-333 with VIA VT8366 chipset
Software Environment: Slackware, gcc 4.1.2, 2.6.23-rc1
Problem Description: 

1, Getting these during boot: 
Jul 24 21:40:41 skogen kernel: ACPI Exception (processor_throttling-0084): AE_NOT_FOUND, Evaluating _PTC [20070126]
Jul 24 21:40:41 skogen kernel: ACPI Exception (processor_throttling-0147): AE_NOT_FOUND, Evaluating _TSS [20070126]

2, After doing what I wrote below I get in syslog:
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
c01cc098
*pdpt = 000000002a912001
*pde = 0000000000000000
Oops: 0000 [#2]
PREEMPT 
Modules linked in:
CPU:    0
EIP:    0060:[<c01cc098>]    Tainted: P      D VLI
EFLAGS: 00010246   (2.6.23-rc1 #1)
EIP is at acpi_processor_throttling_seq_show+0x98/0xdc
eax: 00000000   ebx: effb8100   ecx: 00000000   edx: 00000000
esi: c1764000   edi: 00000000   ebp: ed515040   esp: ef381ef8
ds: 007b   es: 007b   fs: 0000  gs: 0033  ss: 0068
Process cat (pid: 1273, ti=ef380000 task=ed62e000 task.ti=ef380000)
Stack: ed515040 c02f39ad 00000002 00000000 00000000 00000001 00000000 effb8100 
       ed515040 00000001 00001000 c01615c3 0804f000 ea0d8c80 ed515060 00000000 
       ed6606b4 ed660680 00000001 c010c12d 00000000 00000000 effb8100 c01614dc 
Call Trace:
 [<c01615c3>] seq_read+0xe7/0x274
 [<c010c12d>] do_page_fault+0x318/0x739
 [<c01614dc>] seq_read+0x0/0x274
 [<c0172e14>] proc_reg_read+0x83/0x96
 [<c0172d91>] proc_reg_read+0x0/0x96
 [<c014be5b>] vfs_read+0x7c/0xb2
 [<c014c157>] sys_read+0x41/0x67
 [<c010252e>] syscall_call+0x7/0xb
 =======================
Code: e8 95 50 f9 ff ba 03 3a 2f c0 89 e8 e8 74 4e f9 ff c7 44 24 18 00 00 00 00 eb 42 8b 86 04 03 00 00 8b 54 24 18 3b be d8 02 00 00 <8b> 0c 02 b8 20 00 00 00 ba 2a 00 00 00 89 7c 24 0c c7 44 24 04 
EIP: [<c01cc098>] acpi_processor_throttling_seq_show+0x98/0xdc SS:ESP 0068:ef381ef8

Steps to reproduce: cat /proc/acpi/processor/CPU0/throttling (segfaults)

Note: Same as this: http://lkml.org/lkml/2007/6/7/60, it apparently got fixed in 2.6.22-rc4 but it still is here. It doesn't affect anything other I do.
Comment 1 Randy Dunlap 2007-07-24 13:06:03 UTC
Please try the patch at http://lkml.org/lkml/2007/7/23/274
It worked for someone else.
Comment 2 Daniel Viczinger 2007-07-24 13:35:29 UTC
Indeed it does. Thank you, haven't noticed it.
Comment 3 Daniel Viczinger 2007-07-24 13:46:28 UTC
Btw: the ACPI exceptions still remain.
Comment 4 Len Brown 2007-07-24 21:34:37 UTC
Created attachment 12130 [details]
patch vs 2.6.23-rc1 to remove ACPI Exceptions

patch remove the exception messages.
Comment 5 Luming Yu 2007-07-24 22:41:30 UTC
I Ack the patch at comment# 4
Comment 6 Zhang Rui 2007-07-25 02:07:33 UTC
*** Bug 8806 has been marked as a duplicate of this bug. ***
Comment 7 Len Brown 2007-07-25 16:41:42 UTC
Patch in comment #4 shipped in Linux-2.6.23-rc1-git3
closed.

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