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Date: Thu, 29 Oct 2009 16:58:00 -0000
From: "jistone at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sources.redhat.com
Message-ID: <20091029165749.10869.jistone@redhat.com>
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Subject: [Bug kprobes/10869] New: kretprobes waste a lot of memory on kretprobe_instances
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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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