Oops on UHCI module unload (2.4.2-pre1)

Oops on UHCI module unload (2.4.2-pre1)

[John R Lenton]

[-- Attachment #1: Type: text/plain, Size: 730 bytes --]

When trying to figure out how to get USB to work (it was the MPS
setting, more in other post) I got a repeatable Oops (is it an
oops? it doesn't say "Oops!" like I thought they do). That is,
I'd boot, modprobe uhci, plug something in, get lots of timeouts,
unplug the something, modprobe -r uhci. Oops.

Attached are two ksymoops outputs, for the two times I did this.
I stopped modprobe -r'ing after that, then fixed the problem wrt
timeouts, and am now unable to reproduce the bug (even going back
to MPS 1.4).

Let me know if there's anything else of use I can provide, and if
I got the ksymoops thing right :)

-- 
John Lenton (john@grulic.org.ar) -- Random fortune:
Amnesia used to be my favorite word, but then I forgot it.

[-- Attachment #2: ksymoops.out.1.gz --]
[-- Type: application/octet-stream, Size: 1111 bytes --]

[-- Attachment #3: ksymoops.out.2.gz --]
[-- Type: application/octet-stream, Size: 1247 bytes --]

Re: Oops on UHCI module unload (2.4.2-pre1)

[Keith Owens]

On Tue, 6 Feb 2001 05:40:40 -0300, 
John R Lenton <john@grulic.org.ar> wrote:
>When trying to figure out how to get USB to work (it was the MPS
>setting, more in other post) I got a repeatable Oops (is it an
>oops? it doesn't say "Oops!" like I thought they do).

The kernel makes you guess what the error messages are, to add some
spice to life :-)

>Attached are two ksymoops outputs, for the two times I did this.

  Error (expand_objects): cannot stat(/lib/modules/2.4.2-pre1/kernel/drivers/usb/uhci.o) for uhci
  Error (expand_objects): cannot stat(/lib/modules/2.4.2-pre1/kernel/drivers/usb/usbcore.o) for usbcore
  Error (expand_objects): cannot stat(/lib/modules/2.4.2-pre1/kernel/drivers/input/mousedev.o) for mousedev
  Error (expand_objects): cannot stat(/lib/modules/2.4.2-pre1/kernel/drivers/input/input.o) for input
  Feb  4 04:32:20 burocracia kernel: Unable to handle kernel paging request at virtual address d10ff9e8

ksymoops could not find the modules you loaded.  Did you rename, delete
or overwrite /lib/modules/2.4.2-pre1 between the oops and the time you
ran ksymoops?

  Error (expand_objects): cannot stat(/lib/modules/2.4.2-pre1/kernel/drivers/usb/uhci.o) for uhci
  Error (expand_objects): cannot stat(/lib/modules/2.4.2-pre1/kernel/drivers/usb/usbcore.o) for usbcore
  Warning (expand_objects): object /lib/modules/2.4.2-pre1/kernel/drivers/net/ppp_deflate.o for module ppp_deflate has changed since load
  Warning (expand_objects): object /lib/modules/2.4.2-pre1/kernel/drivers/net/bsd_comp.o for module bsd_comp has changed since load
  Warning (expand_objects): object /lib/modules/2.4.2-pre1/kernel/drivers/net/ppp_async.o for module ppp_async has changed since load
  Warning (expand_objects): object /lib/modules/2.4.2-pre1/kernel/drivers/net/ppp_generic.o for module ppp_generic has changed since load
  Warning (expand_objects): object /lib/modules/2.4.2-pre1/kernel/drivers/net/slhc.o for module slhc has changed since load

ksymoops could could not find some modules, those it could find have
changed since the oops.  I would treat all your traces with suspicion,
the base data is very unreliable.  Try to reproduce with current
modules, instead of modules that have changed since the oops.

BTW, do not specify -O unless you have a good reason to ignore objects,
which you don't.  You should supply a system map with -m instead of
suppressing it with -M.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/