Re: Systemtap user space probing issue - Unknown symbol in module

[buddhika chamith <chamibuddhika@gmail.com>]

Thanks. There is an older installation of systemtap in the system as
well. But I made sure that I was using the later version when running
these commands. I will uninstall the older version and see just in
case. And I will follow up with the perf output if that doesn't work
out as well.

On Tue, Jul 19, 2016 at 2:32 PM, David Smith <dsmith@redhat.com> wrote:
> On 07/19/2016 10:47 AM, buddhika chamith wrote:
>> Please find it attached. I don't have sudo access to this particular
>> machine at the moment. But let me know if this is not enough
>> information without running as root.
>>
>> On Tue, Jul 19, 2016 at 11:30 AM, Frank Ch. Eigler <fche@redhat.com> wrote:
>>>
>>> chamibuddhika wrote:
>>>
>>>> [...]
>>>> [7681057.827483] stap_610f349f374e883560aeeb9de1523c1f__13285: Unknown
>>>> symbol __tracepoint_sched_process_exit (err 0)
>>>> [...]
>>>
>>> This is reminiscent of
>>> https://www.sourceware.org/ml/systemtap/2016-q2/msg00082.html but
>>> those incompatibilities were worked out in a stap version << 3.0.
>>> Could you submit a fuller 'stap-report' output?
>
> What's odd is that according to your 'stap-report' output, your kernel
> has CONFIG_TRACEPOINTS=y, but systemtap can't register the tracepoints
> it needs.
>
> Can you try 'perf list tracepoint' as root and see what you get?
>
> One more thing. You said earlier you were running systemtap 3.0. It
> appears that you have systemtap 2.3 installed. Did you build systemtap
> 3.0 yourself?
>
> --
> David Smith
> dsmith@redhat.com
> Red Hat
> http://www.redhat.com
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