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SubjectRe: 2.5.9 -- OOPS in IDE code (symbolic dump and boot log included)
From
>> Oops on 2.5.9 at boot time.

> Could you please introduce two printk("BANG\n") printk("BOOM\n")
> aroung the ata_ar_get() in ide-cd? Just to see whatever the
> command queue is already up and initialized.

This may not be what you wanted:

printk("BANG\n");
ar = ata_ar_get(drive);
printk("BOOM\n");

If it is, neither BANG nor BOOM printed before oops.

I see Melchior may have narrowed down the code path in
this thread.

2.5.10 gives very similar oops to 2.5.9:

Unable to handle kernel NULL pointer dereference at virtual address 00000004
c01bf7f6
*pde = 00000000
Oops: 0002
CPU: 0
EIP: 0010:[<c01bf7f6>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010002
eax: 00000004 ebx: d7f61eb4 ecx: 00000001 edx: 00000000
esi: d7f61e30 edi: c02c8b6c ebp: 00000292 esp: c026bedc
ds: 0018 es: 0018 ss: 0018
Stack: d7f61e30 00000001 c02c8b6c 00000003 00000001 c01c311b c02c8b6c 00000001
00000000 c01c9c52 c02c8b6c 00000001 00000018 d7f61eb4 d7f61e30 c01ca983
c02c8b6c 00000001 00000000 c02c8b6c d7f622c0 c02c8840 c02c8f0c d7f62380
Call Trace: [<c01c311b>] [<c01c9c52>] [<c01ca983>] [<c01c13ba>] [<c01ca8bc>]
[<c01080fc>] [<c0108262>] [<c0105000>] [<c0106eff>] [<c0105240>] [<c0105000>]
[<c0105263>] [<c01052d4>] [<c0105019>]
Code: c7 04 02 00 00 00 00 8b 53 0c 8b 87 34 02 00 00 0f b3 10 8b


>>EIP; c01bf7f6 <__ide_end_request+fe/140> <=====

>>ebx; d7f61eb4 <END_OF_CODE+17c930f8/????>
>>esi; d7f61e30 <END_OF_CODE+17c93074/????>
>>edi; c02c8b6c <ide_hwifs+32c/3a70>
>>esp; c026bedc <init_thread_union+1edc/2000>

Trace; c01c311b <ide_end_request+f/14>
Trace; c01c9c52 <cdrom_end_request+42/4c>
Trace; c01ca983 <cdrom_pc_intr+c7/1d0>
Trace; c01c13ba <ide_intr+c6/13c>
Trace; c01ca8bc <cdrom_pc_intr+0/1d0>
Trace; c01080fc <handle_IRQ_event+30/5c>
Trace; c0108262 <do_IRQ+6a/a8>
Trace; c0105000 <_stext+0/0>
Trace; c0106eff <common_interrupt+1f/30>
Trace; c0105240 <default_idle+0/28>
Trace; c0105000 <_stext+0/0>
Trace; c0105263 <default_idle+23/28>
Trace; c01052d4 <cpu_idle+28/38>
Trace; c0105019 <rest_init+19/1c>

Code; c01bf7f6 <__ide_end_request+fe/140>
00000000 <_EIP>:
Code; c01bf7f6 <__ide_end_request+fe/140> <=====
0: c7 04 02 00 00 00 00 movl $0x0,(%edx,%eax,1) <=====
Code; c01bf7fd <__ide_end_request+105/140>
7: 8b 53 0c mov 0xc(%ebx),%edx
Code; c01bf800 <__ide_end_request+108/140>
a: 8b 87 34 02 00 00 mov 0x234(%edi),%eax
Code; c01bf806 <__ide_end_request+10e/140>
10: 0f b3 10 btr %edx,(%eax)
Code; c01bf809 <__ide_end_request+111/140>
13: 8b 00 mov (%eax),%eax

<0>Kernel panic: Aiee, killing interrupt handler!


--
Randy Hron

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