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Subjectlockup with parport_pc on 2.4.0-test10-pre1
I managed to follow, with a number of debug statements, a problem that
appears to be in parport_pc that causes the following lockup on a dual
P3 500 with modprobe:

NMI Watchdog detected LOCKUP on CPU0, registers:
CPU: 0
EIP: 0010:[<c01deec3>]
EFLAGS: 00000086
eax: 00000301 ebx: 00000216 ecx: 00000001 edx: 000816a1
esi: 00000301 edi: 0000000c ebp: 00034a4e esp: df91fe98
ds: 0018 es: 0018 ss: 0018
Process modprobe (pid: 79, stackpage=df91f000)
Stack: df8f3f20 00000001 c0162cea 00000301 df8f3f20 00000000 00000000
df91ff0c
c0162ea1 00000000 df8f3f20 df8f3f20 00000004 0000000a 00000400
c0134492
00000000 00000004 df91ff0c c196ea04 c18620e0 df9b385c 00000000
00001000
Call Trace: [<c0162cea>] [<c0162ea1>] [<c0134492>] [<c012dd73>]
[<c01527d3>] [<c
0152108>] [<c0125f96>]
[<c012628f>] [<c01261e0>] [<c0131827>] [<c010abf7>] [<c01e002b>]
Code: 80 3d 64 4d 22 c0 00 f3 90 7e f5 e9 e6 31 f8 ff 80 3d ac f6
console shuts up ...

I don't if this is specifically a problem in the module or with modprobe
(2.3.17), but it doesn't happen with any other module. Unfortunately
parport_pc.c was as far as I traced before my work life sucked me back
in.

If more information is needed, please tell me what you need and I'll try
to provide it.

John
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