[Bug lket/4420] systemtap.samples/lket.exp test crashing RHEL4U4 machine

[prasanna at in dot ibm dot com]

------- Additional Comments From prasanna at in dot ibm dot com  2007-07-25 13:01 -------
Possible solutions:
1. Use robust fault handling mechanism for handler which access user address space
   and chances of such handler causing page-faults are high. Robust fualt handling 
   mechanism will recover from such faults.
2. Black list __switch_to() routine and do not allow probes on them.

3. Restrick the probe handler to __switch_to(), so that probes on __switch_to()
   can be still allowed.
4. Use static markers for __switch_to() routines.

It makes more sense to identify routines that get frequently executed in the
hot path and use static markers to collect instrumenation data.

cc'ing Josh

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                 CC|                            |jkenisto at us dot ibm dot
                   |                            |com, joshua dot i dot stone
                   |                            |at intel dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=4420

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