Re: [LTP] [ANNOUNCE] gcov-kernel patches for Linux 2.6.25.

Re: [LTP] [ANNOUNCE] gcov-kernel patches for Linux 2.6.25.

[Subrata Modak]

Peter,

There has been a recent concern that these Patches does not compile on
the x86_64 architecture. We recently had this problem with the 2.6.24
GCOV Patches. Do you have any fixes for this ?

CC-ing Kamalesh, who reported this Problem. Kamalesh, can you please
exemplify your problem to Peter.

Regards--
Subrata

On Mon, 2008-04-21 at 14:22 +0530, Subrata Modak wrote:
> Hi,
> 
> GCOV-kernel patches for Linux 2.6.25 are now available for downloads
> at:
> 
> http://ltp.cvs.sourceforge.net/ltp/utils/analysis/gcov-kernel/,
> 
> You can use them for generating code coverage on 2.6,25.
> 
> -- 
> Regards & Thanks--
> Subrata
> -------------------------------------------------------------------------
> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference 
> Don't miss this year's exciting event. There's still time to save $100. 
> Use priority code J8TL2D2. 
> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
> _______________________________________________ Ltp-list mailing list Ltp-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ltp-list

Re: [LTP] [ANNOUNCE] gcov-kernel patches for Linux 2.6.25.

[Kamalesh Babulal]

Subrata Modak wrote:
> Peter,
> 
> There has been a recent concern that these Patches does not compile on
> the x86_64 architecture. We recently had this problem with the 2.6.24
> GCOV Patches. Do you have any fixes for this ?
> 
> CC-ing Kamalesh, who reported this Problem. Kamalesh, can you please
> exemplify your problem to Peter.

When the gcov patches are applied to the kernels over the x86_64 machines, 
the kernel seg-faults during the bootup, 

Linux version 2.6.24-gcov-autokern1 (root@bl6-13.ltc.austin.ibm.com) (gcc version 4.1.1 20060525 (Red Hat 4.1.1-1)) #1 SMP Fri Apr 4 13:15:01 CDT 2008
Command line: ro root=/dev/VolGroup00/LogVol00 console=tty0 console=ttyS1,19200 selinux=no autobench_args: root=/dev/mapper/VolGroup00-LogVol00 ABAT:1207333349
BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009d400 (usable)
 BIOS-e820: 000000000009d400 - 00000000000a0000 (reserved)
.
.
<snip>
.
.
powernow-k8: Found 1 Dual Core AMD Opteron(tm) Processor 270 processors (4 cpu cores) (version 2.20.00)
powernow-k8: MP systems not supported by PSB BIOS structure
powernow-k8: MP systems not supported by PSB BIOS structure
powernow-k8: MP systems not supported by PSB BIOS structure
powernow-k8: MP systems not supported by PSB BIOS structure
Freeing unused kernel memory: 456k freed
Red Hat nash verinit[1]: segfault at ffffffff80ceccd8 rip ffffffffff60040c rsp 7fff05e68290 error 7
sion 5.0.32 starKernel panic - not syncing: Attempted to kill init!
ting

Please let me know, If any other information is reaquired.
> 
> Regards--
> Subrata
> 
> On Mon, 2008-04-21 at 14:22 +0530, Subrata Modak wrote:
>> Hi,
>>
>> GCOV-kernel patches for Linux 2.6.25 are now available for downloads
>> at:
>>
>> http://ltp.cvs.sourceforge.net/ltp/utils/analysis/gcov-kernel/,
>>
>> You can use them for generating code coverage on 2.6,25.
>>
>> -- 
>> Regards & Thanks--
>> Subrata
>> -------------------------------------------------------------------------
>> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference 
>> Don't miss this year's exciting event. There's still time to save $100. 
>> Use priority code J8TL2D2. 
>> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
>> _______________________________________________ Ltp-list mailing list Ltp-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ltp-list


-- 
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.

Re: [LTP] [ANNOUNCE] gcov-kernel patches for Linux 2.6.25.

[Peter Oberparleiter]

Subrata Modak wrote:
> There has been a recent concern that these Patches does not compile on
> the x86_64 architecture. We recently had this problem with the 2.6.24
> GCOV Patches. Do you have any fixes for this ?

As far as I remember the x86_64 related problems of the gcov-kernel patch were not compile problems, but non-trivial run-time errors when starting the init process. I can't debug those myself so we'd need someone with x86_64 kernel knowledge to help out. I'm planning to post the gcov-kernel patch rewrite later on and I'd like to postpone this particular discussion until the new code base has been published.


Regards,
  Peter