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SubjectRe: Oops with kernel 2.2.10-ac8
On Sun, Jul 04, 1999 at 01:01:40PM +0200, Anzolin Gianluca wrote:
> Unable to handle kernel paging request at virtual address 5a5a5a66
> Eip: 0010:[<c886f752>]
> eax: 5a5a5a5a ebx: c7582128 ecx: c7582000 edx: 5a5a5a5a
> Process swapper (pid:0, process nr:0, stackpage=c01e9000)
> Code: 8b 42 0c 39 d8 75 f7 8b 43 0c 89 42 0c 3b 5d 2c 75 03 89 55
>
> >>EIP: c886f752 <END_OF_CODE+226ce/????>
> Code: c886f752 <END_OF_CODE+226ce/????> 00000000 <_EIP>: <===
> Code: c886f752 <END_OF_CODE+226ce/????> 0: 8b 42 0c movl 0xc(%edx),%eax <===
> Code: c886f755 <END_OF_CODE+226d1/????> 3: 39 d8 cmpl %ebx,%eax
> Code: c886f757 <END_OF_CODE+226d3/????> 5: 75 f7 jne c886f750 <END_OF_CODE+226cc/????>
> Code: c886f759 <END_OF_CODE+226d5/????> 7: 8b 43 0c movl 0xc(%ebx),%eax
> Code: c886f75c <END_OF_CODE+226d8/????> a: 89 42 0c movl %eax,0xc(%edx)
> Code: c886f75f <END_OF_CODE+226db/????> d: 3b 5d 2c cmpl 0x2c(%ebp),%ebx
> Code: c886f762 <END_OF_CODE+226de/????> 10: 75 03 jne c886f767 <END_OF_CODE+226e3/????>
> Code: c886f764 <END_OF_CODE+226e0/????> 12: 89 55 00 movl %edx,0x0(%ebp)
>
> Aiee, killing interrupt handler
> Kernel panic: Attempted to kill the idle task!
> In swapper task - not syncing

This seems to be a bug in my tmscsim driver, which is triggered by the slab
poisoning in the late AC patches. Unfortunately the ksymoops did not resolve
the addresses of the tmscsim module. From my look at it the Oops is in
dc390_RewaitSRB or dc390_SRBdone. So there is a problem with the SRB (SCSI
Request Block) queuing.
I will have a close look at it!

Please note that I'm about to release 2.0e where I reworked the command
queueing. I will install ac patches in order to see, whether I did recreate
that bug. If you want to test it, please look out for 2.0d12 on my web page:
http://www.garloff.de/kurt/linux/dc390/

Regards,
--
Kurt Garloff <garloff@suse.de> SuSE GmbH, Nürnberg, FRG
Linux kernel development; SCSI driver: DC390 (tmscsim/AM53C974)
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