Re: crash upon rmmod aic7xxx (pcmcia)

[Daniel Drake <dsd@gentoo.org>]

(please use reply-to-all)

Kasper Peeters wrote:
>>Try enabling magic sysrq and press Alt+sysrq+9 then Alt+SysRq+P 
> 
> 
> I just spent an hour trying to make this work: it's turned on in the
> kernel, I have done
> 
>   echo '1' > /proc/sys/kernel/sysrq
> 
> , I have done a 'showkey -s' to find out that my sysrq generates
> '0x53', I have done 'setkeycodes 53 84', but none of the
> alt-sysrq-command things does anything (even before triggering the
> aic7xxx bug, that is). I must have overlooked something stupid.
> 
> Anyhow, for what it's worth, the 'rmmod' does spit out some more stuff
> to the console just before the crash (inasfar it has not yet scrolled
> off the screen):
> 
>   Sequencer Free SCB List 0 1 2
>   Sequencer SCB Info
>     0 SCB_CONTROL[0x0]:SCB_SCSIID[0x67]:SCB_LOW[0x0]:SCB_TAG[0xff]
>     1 SCB_CONTROL[0x0]:SCB_SCSIID[0xff]:(TWIN_CHNLB|OID|TWIN_TIB)SCB_LUN[0xff]:(SCB_XFERLEN_ODD|LID)SCB_TAG[0xff]
>     2 SCB_CONTROL[0x0]:SCB_SCSIID[0xff]:(TWIN_CHNLB|OID|TWIN_TIB)SCB_LUN[0xff]:(SCB_XFERLEN_ODD|LID)SCB_TAG[0xff]
>   Pending List:
>     2 SCB_CONTROL[0x40]:(DISCENB)SCB_SCSIID[0x47]:SCB_LUN[0x0]
>   Kernel Free SCB List: 1 0
>   Untagged Q(4):2
>   
>   <<< Dump Card State End >>>
>   qindex = 0, SCB index=0
>   Kernel Panic - not syncing: Loop 1
> 

Ok, if its a kernel panic then I'm fairly sure sysrq would be useless for 
debugging even if it worked on your setup. Also, this is the exact same 
message from the Gentoo bug that I mentioned previously: 
http://bugs.gentoo.org/102636

Perhaps you could file a bug for this at http://bugzilla.kernel.org and I'll 
get the Gentoo bug reporter to post his experience on your bug too.

Thanks,
Daniel