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    SubjectRe: ftrace behaviour (was: [PATCH] ftrace: introduce tracing_reset_online_cpus() helper)

    On Sat, 20 Dec 2008, Pekka Paalanen wrote:
    >
    > I thought this was just about not having to do
    >
    > $ echo 0 > tracing_enabled
    > $ echo 28764243 > buffer_size
    > $ echo 1 > tracing_enabled
    >
    > and instead just do
    >
    > $ echo 28764243 > buffer_size
    >
    > which would do exactly the same, except being easier for the user.
    > Personally I've never dreamed of any kind of resize-in-flight.
    >

    I must be losing it :-p

    You can on tip simply echo 28764243 > buffer_size without disabling the
    tracer. This change is not in mainline, but I expect it will be in
    2.6.29.

    I just resized the buffer while running the function tracer. I made the
    change a while ago.

    -- Steve



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