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    SubjectRe: [RFC][PATCH 0/2] tracing: Have trace_printk()s in the events/ directory
    On Thu, Nov 18, 2010 at 08:06:36AM -0500, Steven Rostedt wrote:
    > On Thu, 2010-11-18 at 13:53 +0100, Frederic Weisbecker wrote:
    > > n other solution, which have been talking with Thomas yesterday, would be
    > > to allow having a single fd for several perf_events at once. That would
    > > solve some problems when you have hundreds of events opened (think about
    > > wide tracing, or use of all individual syscalls).
    > I would highly recommend this. One type of tracing I do all the time is
    > to enable all events (over 600). I don't think that is currently
    > possible with trace and/or perf.


    > Ftrace has no issue simple because it just stores all the events into a
    > single buffer (per cpu though). It does not care if there's one event or
    > 1000.
    > You need to figure out how to do this as well with the function tracer.

    Yeah for the function (and graph) tracers, I really plan to make it a single
    event. I mean one for the function tracer and one for the function graph.
    Although we may want two for the function graph tracer actually. One for
    entry, one for exit.

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