linux-kernel - Re: perf_event: rdpmc self-monitoring overhead issue

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Message-ID: <20130902092315.GI19750@two.firstfloor.org>
Date:	Mon, 2 Sep 2013 11:23:15 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	eranian@...il.com
Cc:	Andi Kleen <andi@...stfloor.org>,
	Vince Weaver <vincent.weaver@...ne.edu>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: perf_event: rdpmc self-monitoring overhead issue

On Mon, Sep 02, 2013 at 10:24:13AM +0200, Stephane Eranian wrote:
> On Mon, Sep 2, 2013 at 4:50 AM, Andi Kleen <andi@...stfloor.org> wrote:
> > Stephane Eranian <eranian@...glemail.com> writes:
> >
> >> I don't see a flag in mmap() to fault it in immediately.
> >
> > MAP_PRESENT
> >
> I could not find this constant defined anywhere in the kernel source tree
> nor in /usr/include. Are you sure of the name?

MAP_POPULATE sorry

-Andi

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