linux-kernel - Re: [PATCH v2 2/2] perf: Userspace event

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Message-ID: <1411729190.3852.21.camel@hornet>
Date:	Fri, 26 Sep 2014 11:59:50 +0100
From:	Pawel Moll <pawel.moll@....com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Richard Cochran <richardcochran@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	John Stultz <john.stultz@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-api@...r.kernel.org" <linux-api@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] perf: Userspace event

On Fri, 2014-09-26 at 07:21 +0100, Namhyung Kim wrote:
> It looks like what trace-marker in ftrace does..  We might connect
> output of the trace marker into a perf event somehow.

I can probably trace_marker's write handler do the same as the new
prctl() would do. But this means that we really want the pre-defined
"zero terminated string" type (0). Otherwise, what type would be
assigned to a record originating from it?

Pawel

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