Re: [RFC][PATCH 0/4] ftrace: Use -mfentry when supported (this isfor x86_64 right now)

[Steven Rostedt]

On Thu, 2011-02-17 at 21:37 +0900, Masami Hiramatsu wrote:

> Oops! with this change, current kprobes might not be able to probe
> the entry of functions, because that is always reserved by ftrace!
> I think we need to have some new interface for replacing each other
> safely...

Good point. I suspect that this wont be ready till .40 anyway. When I
get a chance to work more an this, I'll also include patches where if
-mfentry is activated kprobes will just hook to the mcount caller
instead. Or ftrace itself :)

I'm also working on making the function tracer a bit more flexible. That
is, to let multiple clients control the dynamic trace instead of just
one big global one.

-- Steve


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