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SubjectRe: /dev/cpu/*/(cpuid, msr) unhappy as modules - OOPS!
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Devfs might explain the 2.4.0-test12 oopses, but it can't possibly
explain the oops with 2.2.18. I don't use devfs with 2.2.18.

Chris

> Looks like a devfs problem; complain to the appropriate people. I refuse
> to touch that particular devfs code.
>
> > I have just compiled Linux 2.2.18 (UP) and Linux 2.4.0-test12 (SMP,
> > devfs), and in each case I compiled the msr and cpuid drivers as
> > modules. However, when I tried to read from the devices (using "cat"),
> > I got oopses from both 2.2.18 and 2.4.0-test12. Neither the msr.o nor
> > the cpuid.o modules were loaded beforehand, as I was testing my kmod
> > setup. The oopses are below:

[2.4.0-test12 oopses removed]

> > Linux-2.2.18 (1 oops):
> > $ ksymoops -m /boot/System.map-2.2.18 < oops.txt
> > ksymoops 2.3.4 on i586 2.2.18. Options used
> > -V (default)
> > -k /proc/ksyms (default)
> > -l /proc/modules (default)
> > -o /lib/modules/2.2.18/ (default)
> > -m /boot/System.map-2.2.18 (specified)
> >
> > Warning (compare_maps): ksyms_base symbol module_list_R__ver_module_list
> not found in System.map. Ignoring ksyms_base entry
> > Dec 13 01:31:18 wellhouse kernel: Unable to handle kernel paging request
> at virtual address c887027c
> > Dec 13 01:31:18 wellhouse kernel: current->tss.cr3 = 007ad000, %%cr3 =
> 007ad000
> > Dec 13 01:31:18 wellhouse kernel: *pde = 01472063
> > Dec 13 01:31:18 wellhouse kernel: Oops: 0000
> > Dec 13 01:31:18 wellhouse kernel: CPU: 0
> > Dec 13 01:31:18 wellhouse kernel: EIP: 0010:[chrdev_open+56/88]
> > Dec 13 01:31:18 wellhouse kernel: EFLAGS: 00010286
> > Dec 13 01:31:18 wellhouse kernel: eax: c8870260 ebx: ffffffed ecx:
> 00000000 edx: 000000cb
> > Dec 13 01:31:18 wellhouse kernel: esi: c34d4380 edi: c0565e60 ebp:
> c3c35900 esp: c3b47f4c
> > Dec 13 01:31:18 wellhouse kernel: ds: 0018 es: 0018 ss: 0018
> > Dec 13 01:31:18 wellhouse kernel: Process cat (pid: 1645, process nr: 53,
> stackpage=c3b47000)
> > Dec 13 01:31:18 wellhouse kernel: Stack: c0565e60 00008000 00000003
> 400e88b3 bffffa4c c012497c c0565e60 c34d4380
> > Dec 13 01:31:18 wellhouse kernel: 00000000 c01248d5 00000003
> c05a3000 400e88b3 bffffa4c 00000000 c398549c
> > Dec 13 01:31:18 wellhouse kernel: 00000400 c0124b6f c05a3000
> 00008000 00000000 c0124b56 c3b46000 40013ed0
> > Dec 13 01:31:18 wellhouse kernel: Call Trace: [filp_open+184/264]
> [filp_open+17/264] [sys_open+63/160] [sys_open+38/160] [error_code+45/64] [
> > system_call+52/64]
> > Dec 13 01:31:18 wellhouse kernel: Code: 8b 40 1c 31 db 85 c0 74 0c 83 c4
> f8 56 57 ff d0 89 c3 83 c4
> > Using defaults from ksymoops -t elf32-i386 -a i386
> >
> > Code; 00000000 Before first symbol
> > 00000000 <_EIP>:
> > Code; 00000000 Before first symbol
> > 0: 8b 40 1c mov 0x1c(%eax),%eax
> > Code; 00000003 Before first symbol
> > 3: 31 db xor %ebx,%ebx
> > Code; 00000005 Before first symbol
> > 5: 85 c0 test %eax,%eax
> > Code; 00000007 Before first symbol
> > 7: 74 0c je 15 <_EIP+0x15> 00000015 Before
> first symbol
> > Code; 00000009 Before first symbol
> > 9: 83 c4 f8 add $0xfffffff8,%esp
> > Code; 0000000c Before first symbol
> > c: 56 push %esi
> > Code; 0000000d Before first symbol
> > d: 57 push %edi
> > Code; 0000000e Before first symbol
> > e: ff d0 call *%eax
> > Code; 00000010 Before first symbol
> > 10: 89 c3 mov %eax,%ebx
> > Code; 00000012 Before first symbol
> > 12: 83 c4 00 add $0x0,%esp
> >
> >
> > 1 warning issued. Results may not be reliable.
> >
> > I know they're not exactly show-stoppers, but here they are anyway.
> > Cheers,
> > Chris
> >
>
>

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