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Date: Mon, 17 Sep 2007 20:18:00 -0000
From: "mmlnx at us dot ibm dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sources.redhat.com
Message-ID: <20070917191522.5042.mmlnx@us.ibm.com>
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Subject: [Bug runtime/5042] New: procfs probe script not recreating /proc entries in some cases
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I just tried out the new procfs probe feature (very cool, BTW) and found a bug.
   The bug can be reproduced as follows:

1. Run a procfs probe script that inserts an entry in /proc (e.g.,
/proc/systemtap/stap_d116efa3785a073ecd3b45ae46950a46_72240/foo).

2. CD to /proc/systemtap/stap_d116efa3785a073ecd3b45ae46950a46_72240 in another
xterm.

3. Ctrl-c out of the probe script.  You'll see messages like the following in
/var/log/messages:

Sep 17 11:51:20 localhost kernel: remove_proc_entry:
systemtap/stap_d116efa3785a073ecd3b45ae46950a46_72240 busy, count=1
Sep 17 11:51:20 localhost kernel: remove_proc_entry: /proc/systemtap busy, count=1

...meaning the deletions have been deferred.

4. Run the procfs probe script again, then CD to /proc.  There's no
/proc/systemtap entry.  I don't see any error messages that indicate
/proc/systemtap could not be added.  I had to reboot the system before I could
get the script to add /proc/systemtap again.

-- 
           Summary: procfs probe script not recreating /proc entries in some
                    cases
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: runtime
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: mmlnx at us dot ibm dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=5042

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