2.4.19-4a oops when accessing disk?

[Ken Schweigert]

On Mon, Sep 30, 2002 at 08:33:01PM +0200, Albrecht Dreß wrote:
> I run YDL 2.3 on a new 800 MHz PowerMac G4 Silver. Unfortunately, the system 
> is quite unstable, and I am experiencing very frequent kernel oopses. I was 
> able to run ksymoops on one of them, and apparently it happend during a disk 
> access (see attached file). Any idea about the reason? The machine is less 
> than a week old. However, when I installed MaxOS X from the recovery CD's, I 
> also saw freezes at different states of the copying process, so I am sure it 
> is not related to dust or something like that on the cd's. So might this be 
> a hardware problem?

Have you tried running any of the diagnostics that come on the Apple Hardware
Test CD?  The one that comes in that envelope of disks you got with the Mac.

This just screams RAM problem to me, especially since kernel is loaded into
RAM and you're getting oop's from it.

-ken

> 
> Thanks for any help,
> 
> 	Albrecht.
> 
> -- 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>   Albrecht Dreß  -  Johanna-Kirchner-Straße 13  -  D-53123 Bonn (Germany)
>         Phone (+49) 228 6199571  -  mailto:albrecht.dress@arcor.de
> _________________________________________________________________________

> ksymoops 2.4.1 on ppc 2.4.19-4a.  Options used
>      -v /boot/vmlinux-2.4.19-4a (specified)
>      -k KSYMS (specified)
>      -l /proc/modules (default)
>      -o /lib/modules/2.4.19-4a/ (default)
>      -m MODULES (specified)
> 
> Warning (read_system_map): no kernel symbols in System.map, is MODULES a valid System.map file?
> Warning (compare_ksyms_lsmod): module dmasound_core is in lsmod but not in ksyms, probably no symbols exported
> Warning (compare_ksyms_lsmod): module dmasound_pmac is in lsmod but not in ksyms, probably no symbols exported
> Warning (compare_ksyms_lsmod): module i2c-core is in lsmod but not in ksyms, probably no symbols exported
> Warning (compare_ksyms_lsmod): module i2c-keywest is in lsmod but not in ksyms, probably no symbols exported
> Warning (compare_ksyms_lsmod): module soundcore is in lsmod but not in ksyms, probably no symbols exported
> Warning (compare_maps): mismatch on symbol xchg_u32  , ksyms_base says c000e014, vmlinux says c0008904.  Ignoring ksyms_base entry
> Warning (compare_maps): mismatch on symbol md_size  , md says d3388ae0, /lib/modules/2.4.19-4a/kernel/drivers/md/md.o says d3388380.  Ignoring /lib/modules/2.4.19-4a/kernel/drivers/md/md.o entry
> Warning (compare_maps): mismatch on symbol mddev_map  , md says d33882e0, /lib/modules/2.4.19-4a/kernel/drivers/md/md.o says d3387b80.  Ignoring /lib/modules/2.4.19-4a/kernel/drivers/md/md.o entry
> Sep 30 17:43:48 antares kernel: ds: no socket drivers loaded!
> Sep 30 17:49:10 antares kernel: Oops: kernel access of bad area, sig: 11
> Sep 30 17:49:10 antares kernel: NIP: C002DE6C XER: 20000000 LR: C00309EC SP: CCA9FE30 REGS: cca9fd80 TRAP: 0300    Not tainted
> Using defaults from ksymoops -t elf32-powerpc -a powerpc:common
> Sep 30 17:49:10 antares kernel: MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
> Sep 30 17:49:10 antares kernel: TASK = cca9e000[1244] 'updatedb' Last syscall: 202 
> Sep 30 17:49:10 antares kernel: last math cb964000 last altivec 00000000
> Sep 30 17:49:10 antares kernel: GPR00: 00031FBC CCA9FE30 CCA9E000 0000C000 00000000 CFF71FBC 00000000 1001CD98 
> Sep 30 17:49:10 antares kernel: GPR08: 00000000 CBDBB32C CFF40000 C03A0000 00000001 1001E53C 00000000 FFFFF000 
> Sep 30 17:49:10 antares kernel: GPR16: 00000001 CCA9FEF8 CCA80220 C0050428 00009032 00000001 C032C6C0 CBDBB280 
> Sep 30 17:49:10 antares kernel: GPR24: C02B0000 C0085820 00000000 00000000 CBDBB32C 00000000 CFF71FBC 00000000 
> Sep 30 17:49:10 antares kernel: Call backtrace: 
> Sep 30 17:49:10 antares kernel: 00000004 C0082E20 C0083014 C004FE1C C0050654 C00061DC 00000000 
> Sep 30 17:49:10 antares kernel: 0FF55704 0FF80B64 0FF80294 10002B10 10003DCC 0FECEF70 00000000 
> Warning (Oops_read): Code line not seen, dumping what data is available
> 
> >>NIP; c002de6c <__find_get_page+18/4c>   <=====
> Trace; 00000004 Before first symbol
> Trace; c0082e20 <ext2_get_page+24/140>
> Trace; c0083014 <ext2_readdir+d8/2c8>
> Trace; c004fe1c <vfs_readdir+b4/110>
> Trace; c0050654 <sys_getdents64+50/e8>
> Trace; c00061dc <ret_from_syscall_1+0/b4>
> Trace; 00000000 Before first symbol
> Trace; 0ff55704 Before first symbol
> Trace; 0ff80b64 Before first symbol
> Trace; 0ff80294 Before first symbol
> Trace; 10002b10 Before first symbol
> Trace; 10003dcc Before first symbol
> Trace; 0fecef70 Before first symbol
> Trace; 00000000 Before first symbol
> 
> Sep 30 17:51:50 antares kernel: ds: no socket drivers loaded!
> 
> 10 warnings issued.  Results may not be reliable.


-- 
-Ken Schweigert, Padawan Network Administrator
Byte Productions, LLC
http://www.byte-productions.com