[Bug kprobes/2185] New: Support reentrance from post handler on x86_64

["anil dot s dot keshavamurthy at intel dot com" <sourceware-bugzilla at sourceware dot org>]

Currently kprobes on x86_64, in case of reentrance from post handler
disarm's the probe itself to avoid debug stack corruption and system crash.

However I saw this mail form Andi Kleen on discuss x86_64 mailing list on Mon, 
16 Jan 2006 01:56:39 +0100 
( http://www.x86-64.org/lists/discuss/msg08165.html ) which now
allows nesting of the debug entry point too. So I guess now it should be 
possible for us to support reentrancy from post handler on x86_64. (Worth a 
try, so opening this bug)

The above patch from Andi also unbreaks recursive kprobes from post handler 
which got broken starting from 2.6.15-git12.

-- 
           Summary: Support reentrance from post handler on x86_64
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: kprobes
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: anil dot s dot keshavamurthy at intel dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=2185

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