Re: [LTP] msgctl10 fails on Powerpc Linux-2.6.29.6

[srikanth krishnakar <skrishnakar@gmail.com>]

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On Thu, Jul 23, 2009 at 6:33 AM, Kumar Gala <galak@kernel.crashing.org>wrote:

>
> On Jul 22, 2009, at 11:32 AM, srikanth krishnakar wrote:
>
>
>>
>> On Wed, Jul 22, 2009 at 9:14 PM, Kumar Gala <galak@kernel.crashing.org>
>> wrote:
>>
>> On Jul 22, 2009, at 10:38 AM, srikanth krishnakar wrote:
>>
>>
>>
>> On Wed, Jul 22, 2009 at 8:52 PM, Kumar Gala <galak@kernel.crashing.org>
>> wrote:
>> I'm not seeing any BUG* in traps.c @ line 904.
>>
>>
>> On Jul 21, 2009, at 4:33 AM, srikanth krishnakar wrote:
>>
>> The LTP test case msgctl10.c fails on linux-2.6.29.6 for PowerPC
>> architecture (ppc440)
>>
>>
>> msgctl10    1  B------------[ cut here ]------------
>> kernel BUG at arch/powerpc/kernel/traps.c:904!
>> Oops: Exception in kernel mode, sig: 5 [#9]
>>
>> I'm not seeing any BUG* in traps.c @ line 904.  Do you have some other
>> patches on top of 2.6.29.6?
>>
>> - k
>>
>>
>> I have LTTng patches on top of linux-2.6.29.6.
>>
>> Does it modify traps.c?  Can you see what the code around line 904 looks
>> like and post that.
>>
>> - k
>>  896
>>  897 #if defined(CONFIG_XILINX_VIRTEX_5_FXT) && defined(CONFIG_PPC_FPU)
>>  898         if (reason & REASON_ILLEGAL) {
>>  899                 if (excep_state < 1) {
>>  900                         excep_state++;
>>  901                         return;
>>  902                 }
>>  903                 /* should never get here */
>>  904                 BUG();
>>  905         }
>>  906 #endif
>>  907
>>  908         /* Try to emulate it if we should. */
>>
>>
> Are you sure this is coming from the LTTng patches?  Which actual patch
> makes this change?
>
> - k
>
Thanks kumar,

I've got the patch out which fixes the issues. But now.. seems there is some
generic issue in PPC440 targets, I am observing that
*remap_file_pages01* and *remap_file_pages02  *test cases from LTP are
failing since *Linux-2.6.24* kernel to *Linux-2.6.30*. If you can give some
pointers that would be greatly appreciated ! Or if you have results for this
on any PPC44x would be helpful.

Arch : PowerPC
Target : Xilinx PowerPC440 virtex5

I've tried to test the cause for this but found that kernel throws error
message of "segmentation fault".

Thanks in Advance.

-Srikant



-- 
"The Good You Do, The Best You GET"

Regards
Srikanth Krishnakar
**********************

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