[Bug runtime/10177] New: _stp_kill_time on RT-kernel hits BUG

[jistone at redhat dot com]

See http://sourceware.org/ml/systemtap/2009-q2/msg00635.html

In particular:

BUG: scheduling while atomic: stapio/0x00000001/26142, CPU#3
[...]
 [<ffffffff812a2dea>] cpufreq_unregister_notifier+0x35/0x5c
 [<ffffffffa02e0a1f>] _stp_kill_time+0xb6/0xbd
[stap_246f93f30a500769142af9987624737a_5072]
 [<ffffffffa02e1749>] probe_1391+0x3c/0xa8
[stap_246f93f30a500769142af9987624737a_5072]
 [<ffffffffa02e2621>] enter_end_probe+0x14a/0x1e3
[stap_246f93f30a500769142af9987624737a_5072]

It seems that cpufreq_unregister_notifier is sleepy, and so shouldn't be called
from probe context.

-- 
           Summary: _stp_kill_time on RT-kernel hits BUG
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: runtime
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: jistone at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=10177

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