Oops when loading ac

Oops when loading ac

[Pierre Ossman]

Somewhere between 2.6.7 + acpi_20040715 and 2.6.8.1 (still present in 
2.6.9-rc1) there appeared a bug that causes the ac module to crash when 
loading. I had no problems with the ac module before this. Any ideas on 
what has been changed and what to do about it?

Rgds
Pierre

 From dmesg:

Unable to handle kernel paging request at virtual address c0452440
 printing eip:
c0233162
*pde = 00488027
*pte = 00452000
Oops: 0002 [#1]
PREEMPT DEBUG_PAGEALLOC
Modules linked in: ac radeon ipv6 xfs
CPU:    0
EIP:    0060:[<c0233162>]    Not tainted VLI
EFLAGS: 00010246   (2.6.9-rc1)
EIP is at acpi_bus_register_driver+0xd4/0x169
eax: c0452440   ebx: e0903b40   ecx: e090336b   edx: ffffffed
esi: dd468000   edi: e0903c80   ebp: c03cec60   esp: dd469f84
ds: 007b   es: 007b   ss: 0068
Process insmod (pid: 573, threadinfo=dd468000 task=dd4909f0)
Stack: c03ceca0 e0905031 e0903b40 c014c54b c0469884 00000001 e0903c80 
4003edfa
       0001120e bffffeec 00000004 40010008 00000000 00000000 dd468000 
c0106b79
       40010008 0002edf2 0807a008 00000000 00000000 bfffcef8 00000080 
0000007b
Call Trace:
 [<e0905031>] init_module+0x31/0x52 [ac]
 [<c014c54b>] sys_init_module+0x1ab/0x370
 [<c0106b79>] sysenter_past_esp+0x52/0x71
Code: 00 00 00 a1 6c 75 3d c0 c7 05 f8 74 3d c0 7c f2 39 c0 c7 05 fc 74 
3d c0 bd 01 00 00 89 1d 6c 75 3d c0 c7 03 68 75 3d c0 89 43 04 <89> 18 
81 3d e8 74 3d c0 3c 4b 24 1d 74 1c 68 e8 74 3d c0 68 bf
 <6>note: insmod[573] exited with preempt_count 1
drivers/acpi/scan.c:445: spin_lock(drivers/acpi/scan.c:c03d74e8) already 
locked by drivers/acpi/scan.c/445



-------------------------------------------------------
SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media
100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285

Re: Oops when loading ac

[Len Brown]

no idea.
does compiling the module static or disabling PREEMPT
or disabling DEBUG_PAGEALLOC have any effect?

On Tue, 2004-08-24 at 14:19, Pierre Ossman wrote:
> Somewhere between 2.6.7 + acpi_20040715 and 2.6.8.1 (still present in 
> 2.6.9-rc1) there appeared a bug that causes the ac module to crash when 
> loading. I had no problems with the ac module before this. Any ideas on 
> what has been changed and what to do about it?
> 
> Rgds
> Pierre
> 
>  From dmesg:
> 
> Unable to handle kernel paging request at virtual address c0452440
>  printing eip:
> c0233162
> *pde = 00488027
> *pte = 00452000
> Oops: 0002 [#1]
> PREEMPT DEBUG_PAGEALLOC
> Modules linked in: ac radeon ipv6 xfs
> CPU:    0
> EIP:    0060:[<c0233162>]    Not tainted VLI
> EFLAGS: 00010246   (2.6.9-rc1)
> EIP is at acpi_bus_register_driver+0xd4/0x169
> eax: c0452440   ebx: e0903b40   ecx: e090336b   edx: ffffffed
> esi: dd468000   edi: e0903c80   ebp: c03cec60   esp: dd469f84
> ds: 007b   es: 007b   ss: 0068
> Process insmod (pid: 573, threadinfo=dd468000 task=dd4909f0)
> Stack: c03ceca0 e0905031 e0903b40 c014c54b c0469884 00000001 e0903c80 
> 4003edfa
>        0001120e bffffeec 00000004 40010008 00000000 00000000 dd468000 
> c0106b79
>        40010008 0002edf2 0807a008 00000000 00000000 bfffcef8 00000080 
> 0000007b
> Call Trace:
>  [<e0905031>] init_module+0x31/0x52 [ac]
>  [<c014c54b>] sys_init_module+0x1ab/0x370
>  [<c0106b79>] sysenter_past_esp+0x52/0x71
> Code: 00 00 00 a1 6c 75 3d c0 c7 05 f8 74 3d c0 7c f2 39 c0 c7 05 fc 74 
> 3d c0 bd 01 00 00 89 1d 6c 75 3d c0 c7 03 68 75 3d c0 89 43 04 <89> 18 
> 81 3d e8 74 3d c0 3c 4b 24 1d 74 1c 68 e8 74 3d c0 68 bf
>  <6>note: insmod[573] exited with preempt_count 1
> drivers/acpi/scan.c:445: spin_lock(drivers/acpi/scan.c:c03d74e8) already 
> locked by drivers/acpi/scan.c/445
> 
> 
> 
> -------------------------------------------------------
> SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media
> 100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
> Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
> http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285
> _______________________________________________
> Acpi-devel mailing list
> Acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> https://lists.sourceforge.net/lists/listinfo/acpi-devel



-------------------------------------------------------
SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media
100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285

Re: Oops when loading ac

[Pierre Ossman]

I've done some testing now and the bug only appears with 
DEBUG_PAGEALLOC. PREEMPT has no influence.

Len Brown wrote:

>no idea.
>does compiling the module static or disabling PREEMPT
>or disabling DEBUG_PAGEALLOC have any effect?
>
>On Tue, 2004-08-24 at 14:19, Pierre Ossman wrote:
>  
>
>>Somewhere between 2.6.7 + acpi_20040715 and 2.6.8.1 (still present in 
>>2.6.9-rc1) there appeared a bug that causes the ac module to crash when 
>>loading. I had no problems with the ac module before this. Any ideas on 
>>what has been changed and what to do about it?
>>
>>Rgds
>>Pierre
>>
>> From dmesg:
>>
>>Unable to handle kernel paging request at virtual address c0452440
>> printing eip:
>>c0233162
>>*pde = 00488027
>>*pte = 00452000
>>Oops: 0002 [#1]
>>PREEMPT DEBUG_PAGEALLOC
>>Modules linked in: ac radeon ipv6 xfs
>>CPU:    0
>>EIP:    0060:[<c0233162>]    Not tainted VLI
>>EFLAGS: 00010246   (2.6.9-rc1)
>>EIP is at acpi_bus_register_driver+0xd4/0x169
>>eax: c0452440   ebx: e0903b40   ecx: e090336b   edx: ffffffed
>>esi: dd468000   edi: e0903c80   ebp: c03cec60   esp: dd469f84
>>ds: 007b   es: 007b   ss: 0068
>>Process insmod (pid: 573, threadinfo=dd468000 task=dd4909f0)
>>Stack: c03ceca0 e0905031 e0903b40 c014c54b c0469884 00000001 e0903c80 
>>4003edfa
>>       0001120e bffffeec 00000004 40010008 00000000 00000000 dd468000 
>>c0106b79
>>       40010008 0002edf2 0807a008 00000000 00000000 bfffcef8 00000080 
>>0000007b
>>Call Trace:
>> [<e0905031>] init_module+0x31/0x52 [ac]
>> [<c014c54b>] sys_init_module+0x1ab/0x370
>> [<c0106b79>] sysenter_past_esp+0x52/0x71
>>Code: 00 00 00 a1 6c 75 3d c0 c7 05 f8 74 3d c0 7c f2 39 c0 c7 05 fc 74 
>>3d c0 bd 01 00 00 89 1d 6c 75 3d c0 c7 03 68 75 3d c0 89 43 04 <89> 18 
>>81 3d e8 74 3d c0 3c 4b 24 1d 74 1c 68 e8 74 3d c0 68 bf
>> <6>note: insmod[573] exited with preempt_count 1
>>drivers/acpi/scan.c:445: spin_lock(drivers/acpi/scan.c:c03d74e8) already 
>>locked by drivers/acpi/scan.c/445
>>
>>
>>
>>-------------------------------------------------------
>>SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media
>>100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
>>Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
>>http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285
>>_______________________________________________
>>Acpi-devel mailing list
>>Acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
>>https://lists.sourceforge.net/lists/listinfo/acpi-devel
>>    
>>
>
>  
>



-------------------------------------------------------
SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media
100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285