linux-kernel - Re: [PATCH 1/5] ftrace perf: Check sample types only for sampling events

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Date:	Fri, 11 Mar 2016 19:14:58 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Jiri Olsa <jolsa@...nel.org>, Steven Rostedt <rostedt@...dmis.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
Subject: Re: [PATCH 1/5] ftrace perf: Check sample types only for sampling
 events

On Fri, Mar 11, 2016 at 10:48:14PM +0900, Namhyung Kim wrote:

SNIP

> > > > What about checking is_sampling_event() first and goto the last
> > > > paranoid_tracepoint_raw check instead?  This way we can remove the
> > > > same check in the function trace case.
> > > 
> > > right, will check
> > 
> > hum, did you mean something like this?
> > 
> > I'd rather keep it the original way.. seems more straight
> 
> Hmm.. I think I was wrong.  But it seems we can simply return 0 for
> non sampling case.  How about this?

yep, that seems better.. will post v2

thanks,
jirka