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    SubjectRe: [RFC PATCH -tip 0/9]ftrace, kprobes: Ftrace-based kprobe optimization
    (2012/05/30 7:45), Steven Rostedt wrote:
    > On Tue, 2012-05-29 at 21:48 +0900, Masami Hiramatsu wrote:
    >> Also, this makes all __kprobes functions "notrace", because
    >> some of those functions are considered as to be called from
    >> kprobes handler which is called from function tracer.
    >> I think that is another discussion point. Perhaps, we need
    >> to introduce another tag which means "don't put kprobe on
    >> this function" instead of __kprobes and apply that.
    > Actually, instead, we can force kprobes to have all "__kprobes"
    > functions added to its 'notrace' ftrace_ops. This will just keep kprobes
    > from function tracing these, as I find myself tracing functions marked
    > by kprobes quite a bit.

    Hmm, I'm not so sure how the notrace and filter works.
    What happens if I set a foo function-entry on filter
    and keep notrace empty?
    - only foo's nop is replaced with call?
    - or all functions including foo is traced?

    Thank you,

    Masami HIRAMATSU
    Software Platform Research Dept. Linux Technology Center
    Hitachi, Ltd., Yokohama Research Laboratory

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      Last update: 2012-05-30 09:41    [W:0.026 / U:59.520 seconds]
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