Messages in this thread | | | Date | Fri, 20 Sep 2002 16:24:58 +0200 (CEST) | From | Pierrick Hascoet <> | Subject | cpufreq oops with 2.4.20-pre7-ac3 |
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Hi,
I caught an oops during the 2.4.20-pre7-ac3 boot sequence, this is related to the last cpufreq update i guess, it's probably not an ac3 issue. The cause it's a divide per 0 during cpufreq scaling.
The patch introduced here: http://marc.theaimsgroup.com/?l=linux-kernel&m=103001001119668&w=2 must be aware of the div per 0 possible case.
OTOH, I can reproduce it only when laptop boot with ac power on, so with a 866 cpu frequency, scaled by cpufreq.
Best regards, Pierrick.
Laptop: Compaq Evo N600c with ICH3-M chipset.
model name : Intel(R) Pentium(R) III Mobile CPU 866MHz stepping : 1 cpu MHz : 664.460
batz:~# ksymoops --vmlinux=/usr/src/linux-2.4.20-pre7-ac3/vmlinux --system-map=/usr/src/linux-2.4.20-pre7-ac3/System.map --no-ksyms --no-lsmod < cpufreq.oops.txt ksymoops 2.4.5 on i686 2.4.20-pre1-ac3. Options used -v /usr/src/linux-2.4.20-pre7-ac3/vmlinux (specified) -K (specified) -L (specified) -o /lib/modules/2.4.20-pre1-ac3/ (default) -m /usr/src/linux-2.4.20-pre7-ac3/System.map (specified)
No modules in ksyms, skipping objects CPU: 0 EIP: 0010:[<c010b413>] Not tainted Using defaults from ksymoops -t elf32-i386 -a i386 EFLAGS: 00010246 eax: 004bde9c ebx: 004bde9c ecx: 00000000 edx: 00000000 esi: 00000000 edi: c11bbfa8 ebp: 000021c5 esp: c11bbf20 ds: 0018 es: 0018 0018 Process swapper (pid: 1, stackpage=c11bb000) Stack: c02227a0 c11bbfa8 00000001 c0223fb4 00000097 00000246 c11b4800 c11bbfa8 c011edee c02227a0 00000001 c11bbfa8 00000000 c11bbfa8 000021c5 c012233c c027aad8 00000001 c11bbfa8 c11bbf00 00000001 c11bbfa8 00001001 00000000 Call Trace: [<c011edee>] [<c012233c>] [<c0111b65>] [<c0111ea8>] [<c0105023>] [<c01054e8>] Code: f7 f1 89 c3 0f af dd 89 d6 0f af f5 89 f0 31 d2 f7 f1 01 d8
>>EIP; c010b413 <time_cpufreq_notifier+167/204> <=====
>>EIP; c010b413 <time_cpufreq_notifier+167/204> <=====
>>eax; 004bde9c Before first symbol >>ebx; 004bde9c Before first symbol >>edi; c11bbfa8 <END_OF_CODE+f1d0f4/????> >>ebp; 000021c5 Before first symbol >>esp; c11bbf20 <END_OF_CODE+f1d06c/????>
Trace; c011edee <notifier_call_chain+1e/38> Trace; c012233c <cpufreq_notify_transition+ec/104> Trace; c0111b65 <speedstep_set_state+15d/168> Trace; c0111ea8 <speedstep_detect_speeds+80/b8> Trace; c0105023 <init+7/114> Trace; c01054e8 <kernel_thread+28/38>
Code; c010b413 <time_cpufreq_notifier+167/204> 00000000 <_EIP>: Code; c010b413 <time_cpufreq_notifier+167/204> <===== 0: f7 f1 div %ecx <===== Code; c010b415 <time_cpufreq_notifier+169/204> 2: 89 c3 mov %eax,%ebx Code; c010b417 <time_cpufreq_notifier+16b/204> 4: 0f af dd imul %ebp,%ebx Code; c010b41a <time_cpufreq_notifier+16e/204> 7: 89 d6 mov %edx,%esi Code; c010b41c <time_cpufreq_notifier+170/204> 9: 0f af f5 imul %ebp,%esi Code; c010b41f <time_cpufreq_notifier+173/204> c: 89 f0 mov %esi,%eax Code; c010b421 <time_cpufreq_notifier+175/204> e: 31 d2 xor %edx,%edx Code; c010b423 <time_cpufreq_notifier+177/204> 10: f7 f1 div %ecx Code; c010b425 <time_cpufreq_notifier+179/204> 12: 01 d8 add %ebx,%eax
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