Re: [PATCH v3 tip/core/rcu 3/9] rcu: Add synchronous grace-period waiting for RCU-tasks

Peter Zijlstra
2014-08-08T16:17:28Z

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On Fri, Aug 08, 2014 at 11:39:49AM -0400, Steven Rostedt wrote:
> Also, anyone can register a function handler (perf, systemtap, and even
> LTTng can).

So how common is it to have more than 1 function event handler, and how
many of those cases is there significant difference in the actual
functions?

Because that's the case you're optimizing for. Why is that an important
enough case.

I'm thinking I'll never trigger that, I only ever have the one normal
ftrace handler. So no trampolines for me, the code you have now works
just fine.

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