* S390x Weekly testing
@ 2007-03-13 2:01 David Wilder
2007-03-13 17:43 ` Frank Ch. Eigler
0 siblings, 1 reply; 2+ messages in thread
From: David Wilder @ 2007-03-13 2:01 UTC (permalink / raw)
To: systemtap
Some bad luck this week. I am hitting what looks like a kprobes bug on
the 2.6.21-rc3.
The system is crashing in the stap prologue test.
illegal operation: 0001 Ã#29¨
CPU: 3 Not tainted
Process find (pid: 1571, task: 000000003fc28718, ksp: 000000003a357c70)
Krnl PSW : 0704200180000000 000000000018d844 (sys_write+0x24/0x80)
Krnl GPRS: 0000000000000000 000002000018fd38 0000000000000001
0000020000020000
0000000000000048 000002000018a8a8 0000000000000048
0000000000000010
000000000018d820 000000003a356000 0000020000020000
fffffffffffffff7
0000000000000048 000000000010e408 000000003a357eb8
000000003a357e70
Krnl Code: f0 98 00 24 41 30 f0 ac c0 e5 00 00 03 94 b9 04 00 4c b9 02
Call Trace:
(Ã<040000003a357e78>¨ 0x40000003a357e78)
The crashing PSW (ip) is in the middle of the probed instruction.
Digging into it..
---
000000000018d820 <sys_write>:
18d820: eb af f0 68 00 24 stmg %r10,%r15,104(%r15)
18d826: a7 f1 1f 00 tml %r15,7936
18d82a: b9 04 00 ef lgr %r14,%r15
18d82e: a7 84 00 01 je 18d830 <sys_write+0x10>
18d832: a7 fb ff b8 aghi %r15,-72
18d836: b9 04 00 a3 lgr %r10,%r3
18d83a: b9 04 00 c4 lgr %r12,%r4
18d83e: a7 b9 ff f7 lghi %r11,-9
>> 18d842: e3 e0 f0 98 00 24 stg %r14,152(%r15)
<< this is the probe point
18d848: 41 30 f0 ac la %r3,172(%r15)
18d84c: c0 e5 00 00 03 94 brasl %r14,18df74 <fget_light>
18d852: b9 04 00 4c lgr %r4,%r12
--
David Wilder
IBM Linux Technology Center
Beaverton, Oregon, USA
dwilder@us.ibm.com
(503)578-3789
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: S390x Weekly testing
2007-03-13 2:01 S390x Weekly testing David Wilder
@ 2007-03-13 17:43 ` Frank Ch. Eigler
0 siblings, 0 replies; 2+ messages in thread
From: Frank Ch. Eigler @ 2007-03-13 17:43 UTC (permalink / raw)
To: David Wilder; +Cc: systemtap
David Wilder <dwilder@us.ibm.com> writes:
> Some bad luck this week. I am hitting what looks like a kprobes bug
> on the 2.6.21-rc3.
> The system is crashing in the stap prologue test.
> [...]
> The crashing PSW (ip) is in the middle of the probed instruction.
This could be the same problem that is occurring on other hosts with
newly relocatable kernel images. Please cross-check the "stap -vv"
symbol addresses with those in /proc/kallsyms. If they don't match,
don't use stap until we fix this mismatch.
- FChE
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