Re: 2.6.15.1 Oops: rmmod ide-scsi

[Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>]

Hi Matthias,

Unfortunately this a known bug since at least 2.6.8 days:

http://bugzilla.kernel.org/show_bug.cgi?id=3568

Fixing would probably require adding reference counting on SCSI host.

On 1/17/06, Matthias Andree <matthias.andree@gmx.de> wrote:
> Greetings,
>
> playing with 2.6.15.1 a bit, I found that unloading ide-scsi causes two
> reproducible Oopsen here, and then the system locks up a short while
> later (with SysRq still functional so I can SysRq+B, but this corrupted
> an innocent .pyo file unrelated and even unaccessed during this time...)
>
> Procedure to reproduce:
>
> boot with init=/bin/bash added
>
> rmmod ide-cd      # SUSE loads this module from initrd
> modprobe ide-scsi
> rmmod ide-scsi    # <- oopses right after that with Oops #1
>                   #    and a few seconds later with Oops #2
>
> Enclosed: (1) the full dmesg and (2) .config (I fed the latter through
> egrep to ditch the comments and blank lines and sorted it for easy "is
> option XYZ set" retrieval).
>
> I don't think ide-cd is the culprit here, I can unload and reload it
> several times in a row without Oops.
>
> There be more dragons inside that module,
> but that's a different tale
> not to be told today.
>
> Regards,
>
> --
> Matthias Andree