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Subject[2.5.54 - Oops] CPUFreq [Was: Re: [2.5.54] OOPS: unable to handle kernel paging request]
Date
Hello,

I've got it running my serial console. Full trace at boot time is :
SBF: Simple Boot Flag extension found and enabled.
SBF: Setting boot flags 0x1
cpufreq: P4/Xeon(TM) CPU On-Demand Clock Modulation available
divide error: 0000
CPU: 0
EIP: 0060:[<c01151bb>] Not tainted
EFLAGS: 00010246
Unable to handle kernel paging request at virtual address ffffff8d
printing eip:
c012ebcf
*pde = 00001067
*pte = 00000000
Oops: 0002
CPU: 0
EIP: 0060:[<c012ebcf>] Not tainted
EFLAGS: 00010006

and ksymoops says :
8 [10:21] rol@donald:~> ksymoops -v /usr/src/linux/vmlinux -K -m
/boot/System.map-2.5.54 <oops-cpufreq2
ksymoops 2.4.8 on i686 2.4.20. Options used
-v /usr/src/linux/vmlinux (specified)
-K (specified)
-l /proc/modules (default)
-o /lib/modules/2.4.20/ (default)
-m /boot/System.map-2.5.54 (specified)

No modules in ksyms, skipping objects
No ksyms, skipping lsmod
CPU: 0
EIP: 0060:[<c01151bb>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010246
Unable to handle kernel paging request at virtual address ffffff8d
c012ebcf
*pde = 00001067
Oops: 0002
CPU: 0
EIP: 0060:[<c012ebcf>] Not tainted
EFLAGS: 00010006
Warning (Oops_read): Code line not seen, dumping what data is available


>>EIP; c01151bb <time_cpufreq_notifier+14f/208> <=====
>>EIP; c012ebcf <kallsyms_lookup+df/194> <=====


1 warning issued. Results may not be reliable.

Problem is that ksymoops seems to decode the paging request fault,
not the 0 divide error...

This comes from a plain 2.5.54 kernel, no patches applied.

Dominik, you told me last week, with 2.5.53, that a patch was to
be used.
Is it included in 2.5.54 ?
If not, forget this mail... just tell me, I'll apply the patch and
I'll tell you if it's better.

Regards,
Paul


> -----Original Message-----
> From: linux-kernel-owner@vger.kernel.org
> [mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of
> Steven Barnhart
> Sent: Friday, January 03, 2003 10:06 PM
> To: Mark Hahn
> Cc: linux-kernel@vger.kernel.org
> Subject: Re: [2.5.54] OOPS: unable to handle kernel paging request
>
>
> On Fri, 2003-01-03 at 10:48, Mark Hahn wrote:
> > it's not very meaningful: some part of the kernel tried
> dereferencing
> > a null pointer (as it happens, with a negative offset, such as you
> > might expect from a variable sitting in the stack). the
> negativeness
> > is not surprising, and the value of the offset would depend on your
> > cpu/compiler/config.
>
> Well I have a Intel Celeron 1.06 GHz (i686). 384MB ram, gcc
> 3.2 (redhat 8 release). I don't really know how to decode it
> since I have no serial console hookups...anything paticualr I
> could get from the oops report during bootup? i.e. what
> sections to copy?
>
> --
> Steven
> sbarn03@softhome.net
> GnuPG Fingerprint: 9357 F403 B0A1 E18D 86D5 2230 BB92 6D64 D516 0A94
>
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