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divya<dipraksh@linux.vnet.ibm.com> writes:
While running systemtap tests on the p6 machine , against the kernel
version 2.6.36-rc7-git3 Oops occured , here are the call trace
Did the oops happen during a systemtap module startup vs. operation vs. shutdown? stap -V version string?
BUG: spinlock bad magic on CPU#6, stapio/20398
-- 0:conmux-control -- time-stamp -- Oct/13/10 2:49:18 --res
lock: c000000000fcfa18, .magic: 00000000, .owner:<none>/-1, .owner_cpu: 0
Call Trace:
[c0000001effbfab0] [c000000000011934] .show_stack+0x6c/0x16c (unreliable)
[c0000001effbfb60] [c0000000002c9274] .spin_bug+0xb0/0xd4
[c0000001effbfbf0] [c0000000002c953c] .do_raw_spin_lock+0x48/0x184
[c0000001effbfc90] [c00000000054af78] ._raw_spin_lock+0x10/0x24
[c0000001effbfd00] [d000000003015908] .__stp_time_timer_callback+0x94/0x13c [stap_75ce6f84d34f8665c9a6b8e27fb9ea95_818798]
[...]
kernel BUG at kernel/timer.c:681!
Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=1024 NUMA pSeries
[...]
[c0000001effbfc50] [c0000001effbfd00] 0xc0000001effbfd00 (unreliable)
[c0000001effbfd00] [d00000000301597c] .__stp_time_timer_callback+0x108/0x13c [stap_75ce6f84d34f8665c9a6b8e27fb9ea95_818798]
[c0000001effbfdc0] [c00000000009c2f8] .run_timer_softirq+0x1d8/0x2a8
We have had occasional problems in the past with something like this: http://sourceware.org/PR10651, but it never was tracked down to a systemtap bug per se, as opposed to suspicions that the kernel was not satisfying one of its guarantees w.r.t. del_timer_sync().
- FChE
Sorry Frank for the late reply The Oops occured during the execution of systemtap tests.
stap version being : Snapshot: 89e2abb
Thanks Divya
Attachment:
systemtap.DEBUG
Description: Text document
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