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SubjectRe: BUG() in asm/pci.h:142 with 2.4.13 (cause found!)
Hello

The cause for my problems with crashing kernels when accessing the tape
drive were differences between the original external RAID that belongs
to the machine and a temporarily, nearly equal, RAID that we attached while
the original was send away for repair.
The temp. RAID was Ultra3 160 and /proc/scsi/aic7xxx/0 showed me a cur.
speed of 160 while the "old" and working one only did Ultra2 with 80Mbit/s.

I don't know if it's a hardware incompatibility or if the Linux kernel
drivers cannot handle this specific case.

The problem exists in 2.4.11-pre6, 2.4.13, 2.4.12-ac6 and 2.4.13 with
patched from axboa(?) and D. Miller.

bye,

-christian-


On Thu, Oct 25, 2001 at 12:07:01PM +0200, Christian Hammers wrote:
...
> 2.4.13 was the easiest one to reproduce: when starting the tape backup
> to a HP DDS3/DAT Streamer (C1537A) via a Adaptec SCSI Controller
> (Adaptec 7892A in /proc/pci) on a Gigabyte GA-6VTXD Dual Motherboard with
> two PIII and 2GB of RAM it crashed immediately with the error attached
> below. The machine was under "stresstest-simulation" load at this time.
...
> kernel: kernel BUG at /usr/local/src/kernel/linux-2.4.13/include/asm/pci.h:142!
...
> kernel: scsi0:0:0:0: Attempting to queue an ABORT message
> kernel: (scsi0:A:0:0): Queuing a recovery SCB
> kernel: scsi0:0:0:0: Device is disconnected, re-queuing SCB
...

--
Christian Hammers WESTEND GmbH - Aachen und Dueren Tel 0241/701333-0
ch@westend.com Internet & Security for Professionals Fax 0241/911879
WESTEND ist CISCO Systems Partner - Premium Certified

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