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    SubjectRe: [PATCH 2/4] ftrace - add function_duration tracer
    Steven Rostedt wrote:
    > On Thu, 2009-12-10 at 13:13 -0800, Tim Bird wrote:
    >> I have some patches ...
    >> to make it possible to use arbitrary ftrace plugins
    >> at boot time. (There are issues with the current code for
    >> anything other than the bootgraph plugin).
    > We already have a way to enable arbitrary ftrace plugins at boot time:
    > Try ftrace=function on the command line.

    That's what I'm using, but my function_duration tracer didn't
    work, because of an issue initializing the trace-option files.
    The problem was that the debugfs wasn't initialized yet.
    I worked up a simple fix to defer initializing the
    trace-option files in debugfs until later in the boot

    Maybe you've already fixed this. I'll check out the
    latest code and see if I still have problems with it.
    If so, I'll send the patches (which are quite small)
    for consideration.
    -- Tim

    Tim Bird
    Architecture Group Chair, CE Linux Forum
    Senior Staff Engineer, Sony Corporation of America

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