[Bug kprobes/10869] New: kretprobes waste a lot of memory on kretprobe_instances

[jistone at redhat dot com]

As noted in bug #10839 comment #3, using kmalloc for each individual
kretprobe_instance wastes a lot of kernel memory.  In my measurement, each 40
byte kmalloc request actually reserves 136 bytes.  Having a large number of
kretprobes with large maxactive values makes this waste add up quickly.

-- 
           Summary: kretprobes waste a lot of memory on kretprobe_instances
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: kprobes
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: jistone at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=10869

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