Re: perf/ftrace: does PERF_EVENT_IOC_SET_FILTER serve any purpose?

[Vince Weaver]

On Tue, 9 Jun 2015, Steven Rostedt wrote:

> What kernel are you using? You may need to update perf.
> 
> We switched to a tracefs filesystem, but the old perf wont read any
> events if it's not located in debugfs. That is, it actually tested
> which filesystem the event files were mounted on, and if they didn't
> match the debugfs mount type, it ignored them. That was fixed recently.

I am running 4.1-rc7 and was trying to use perf_4.0.

If I use the kernel's version of perf it works.

sigh.

Vince
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