From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: Pekka Enberg <penberg@cs.helsinki.fi>
Subject: Re: [PATCH 5/5] proc: export more page flags in /proc/kpageflags
Cc: kosaki.motohiro@jp.fujitsu.com, Ingo Molnar <mingo@elte.hu>,
       Andi Kleen <andi@firstfloor.org>, Wu Fengguang <fengguang.wu@intel.com>,
       Steven Rostedt <rostedt@goodmis.org>,
       =?ISO-2022-JP?B?RnIbJEJxRXFTGyhCaWM=?= Weisbecker 
	<fweisbec@gmail.com>,
       Larry Woodman <lwoodman@redhat.com>,
       Peter Zijlstra <a.p.zijlstra@chello.nl>,
       Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>,
       Andrew Morton <akpm@linux-foundation.org>,
       LKML <linux-kernel@vger.kernel.org>, Matt Mackall <mpm@selenic.com>,
       Alexey Dobriyan <adobriyan@gmail.com>,
       "linux-mm@kvack.org" <linux-mm@kvack.org>
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References: <20090428093621.GD21085@elte.hu> <84144f020904280257j57b5b686k91cc4096a8e5ca29@mail.gmail.com>
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Date: Tue, 28 Apr 2009 19:10:25 +0900 (JST)
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> I guess the main question here is whether this approach will scale to
> something like kmalloc() or the page allocator in production
> environments. For any serious workload, the frequency of events is
> going to be pretty high.

Immediate Values patch series makes zero-overhead to tracepoint
while it's not used.

So, We have to implement to stop collect stastics way. it restore
zero overhead world.
We don't lose any performance by trace.


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