Ah, bummer! And I was having so much fun. I'm running a 2.4.19-4suse-SMP kernel. You running a 2.4.21? I looked at the source for 2.4.21 and it "looked" like it would have the same problem.
You did the rmmod before catting? Weird. Now, I'm gonna have to go and try a stock IBM kernel to see what happens... Leland > -----Original Message----- > From: Post, Mark K [mailto:[EMAIL PROTECTED] > Sent: Wednesday, July 23, 2003 4:57 PM > To: [EMAIL PROTECTED] > Subject: Re: Any of you not seen a kernel OOPs wanna see one? > > > Leland, > > Not for me. I issued the command, and it worked just fine. > No errors in > dmesg or anything. > > # cat /proc/s390dbf/dasd/sprintf > 00 01055273287:534983 0 - 00 00212336 debug area created > 00 01055273287:535076 1 - 00 002122f6 Registered > successfully to major no > 94 > 00 01055273287:535131 1 - 00 001096e8 DIAG discipline initializing > 00 01055273287:558783 1 - 00 002121ae Registered DIAG discipline > successfully > 00 01055273287:558828 1 - 00 00100764 ECKD discipline initializing > 00 01055273287:579826 1 - 00 000fa714 waiting for responses... > 00 01055273287:614369 1 - 00 0010074e We are interested in: > CU 3880/00 > 00 01055273287:614418 1 - 00 0010074e We are interested in: > CU 3990/00 > 00 01055273287:614468 1 - 00 0010074e We are interested in: > CU 2105/00 > 00 01055273287:614520 1 - 00 0010074e We are interested in: > CU 9343/00 > 00 01055273287:614574 1 - 00 00212198 Registered ECKD discipline > successfully > 00 01055273287:614627 1 - 00 00108764 FBA discipline initializing > 00 01055273287:614697 1 - 00 0010874e We are interested in: > Dev 9336/00 @ > CU 6310/00 > 00 01055273287:614899 1 - 00 0010874e We are interested in: > Dev 3370/00 @ > CU 3880/00 > 00 01055273287:614914 1 - 00 00212182 Registered FBA discipline > successfully > 00 01055273287:614928 1 - 00 00211fec initialization finished > 00 01055305585:232606 1 - 00 000fc286 /proc/dasd/devices: '' > > > What version of the kernel are you running? > > Mark Post > > -----Original Message----- > From: Lucius, Leland [mailto:[EMAIL PROTECTED] > Sent: Wednesday, July 23, 2003 5:51 PM > To: [EMAIL PROTECTED] > Subject: Any of you not seen a kernel OOPs wanna see one? > > > !!!DO NOT DO THIS ON A PRODUCTION IMAGE!!! > > This is probably a know issue, but thought some of you more > sadistic types > that have never seen one, might like to see a pretty little > kernel OOPs. > (This is a fairly lame one though...) > > Just modprobe any of the dasd_*_mod disciplines and then > rmmod it. Now > enter "cat /proc/s390dbf/dasd/sprintf" and look on your > console or log. > > You should see something like this: > > Unable to handle kernel pointer dereference at virtual kernel address > 0000000004 > 93f000 > > Oops: 0011 > > CPU: 0 Tainted: P > > Process cat (pid: 3652, task: 00000000025b4000, ksp: 00000000025b7e80) > > Krnl PSW : 0700200180000000 00000000002e6d74 > > Krnl GPRS: 000000000493f678 0000000001f1d046 0000000001f1d047 > 00000000ffffffff > 000000000493f3e0 00000000025b7b80 0000000000000000 > 0000000001f1d047 > 00000000025b7b80 0000000001f1d047 0000000101f1d045 > 0000000002581330 > 0000000001f1d047 00000000003031d0 00000000025b7a40 > 00000000025b7978 > Krnl ACRS: 00000000 00000000 00000000 00000000 > > 00000001 00000000 00000000 00000000 > > 00000000 00000000 00000000 00000000 > > 00000000 00000000 00000000 00000000 > > Krnl Code: bf 21 40 00 a7 84 00 1d 18 12 54 10 d0 00 a7 1e 00 25 a7 84 > > Call Trace: [<00000000002e75f6>] [<00000000002e766c>] > [<000000000010df66>] > > [<000000000010c318>] [<000000000010c406>] [<000000000015f926>] > > [<00000000001050f2>] > > > Cool huh? Now for even more fun, use the "Call Trace" and your > "/boot/System.map" to track down where the problem occurred. > > I know, I know...I need a life!!! :-D > > Leland >
