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* [Bug runtime/10177] New: _stp_kill_time on RT-kernel hits BUG
@ 2009-05-20 19:30 jistone at redhat dot com
  2009-05-20 22:00 ` [Bug runtime/10177] " jistone at redhat dot com
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: jistone at redhat dot com @ 2009-05-20 19:30 UTC (permalink / raw)
  To: systemtap

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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* [Bug runtime/10177] _stp_kill_time on RT-kernel hits BUG
  2009-05-20 19:30 [Bug runtime/10177] New: _stp_kill_time on RT-kernel hits BUG jistone at redhat dot com
@ 2009-05-20 22:00 ` jistone at redhat dot com
  2009-05-21  9:00 ` kiran at linux dot vnet dot ibm dot com
  2009-05-21 15:25 ` jistone at redhat dot com
  2 siblings, 0 replies; 4+ messages in thread
From: jistone at redhat dot com @ 2009-05-20 22:00 UTC (permalink / raw)
  To: systemtap


------- Additional Comments From jistone at redhat dot com  2009-05-20 22:00 -------
This should be fixed in git now, but I don't have an RT kernel to test with. 
Please test and confirm with this fix:

commit 29e2616aeeb82605a6efe1dbc574b499781eafbe
Author: Josh Stone <jistone@redhat.com>
Date:   Wed May 20 14:46:25 2009 -0700

    PR10177: init/kill time in sleepy context only


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |WAITING


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

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* [Bug runtime/10177] _stp_kill_time on RT-kernel hits BUG
  2009-05-20 19:30 [Bug runtime/10177] New: _stp_kill_time on RT-kernel hits BUG jistone at redhat dot com
  2009-05-20 22:00 ` [Bug runtime/10177] " jistone at redhat dot com
@ 2009-05-21  9:00 ` kiran at linux dot vnet dot ibm dot com
  2009-05-21 15:25 ` jistone at redhat dot com
  2 siblings, 0 replies; 4+ messages in thread
From: kiran at linux dot vnet dot ibm dot com @ 2009-05-21  9:00 UTC (permalink / raw)
  To: systemtap


------- Additional Comments From kiran at linux dot vnet dot ibm dot com  2009-05-21 09:00 -------
Hi Josh,
I tested your fix with RT kernel. The bug is resolved now. Thanks a lot

-- 


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

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^ permalink raw reply	[flat|nested] 4+ messages in thread

* [Bug runtime/10177] _stp_kill_time on RT-kernel hits BUG
  2009-05-20 19:30 [Bug runtime/10177] New: _stp_kill_time on RT-kernel hits BUG jistone at redhat dot com
  2009-05-20 22:00 ` [Bug runtime/10177] " jistone at redhat dot com
  2009-05-21  9:00 ` kiran at linux dot vnet dot ibm dot com
@ 2009-05-21 15:25 ` jistone at redhat dot com
  2 siblings, 0 replies; 4+ messages in thread
From: jistone at redhat dot com @ 2009-05-21 15:25 UTC (permalink / raw)
  To: systemtap


------- Additional Comments From jistone at redhat dot com  2009-05-21 15:25 -------
Fix confirmed...

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |FIXED


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

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end of thread, other threads:[~2009-05-21 15:25 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-05-20 19:30 [Bug runtime/10177] New: _stp_kill_time on RT-kernel hits BUG jistone at redhat dot com
2009-05-20 22:00 ` [Bug runtime/10177] " jistone at redhat dot com
2009-05-21  9:00 ` kiran at linux dot vnet dot ibm dot com
2009-05-21 15:25 ` jistone at redhat dot com

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