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Hi, When I use the attached script for all ext3 call-chains stack_used() is _always_ 481. I'm running the latest systemtap.git on an RHEL5 x86_64 system (though older versions of systemtap showed the same 481). I've tested switching the module from ext3 to others and 481 doesn't change. Looking at tapset/context.stp the implementation for stack_used() looks fine. But given the constant 481 I'm seeing is systemtap somehow showing systemtap-tainted stack usage? Mike
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stack_usage.stp
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