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Date: Fri, 27 Mar 2015 12:13:06 -0400
From: Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH 1/7] tracing, mm: Record pfn instead of pointer to
 struct page
Message-ID: <20150327121306.32ad44c1@gandalf.local.home>
In-Reply-To: <1427422087-17239-2-git-send-email-namhyung@kernel.org>
References: <1427422087-17239-1-git-send-email-namhyung@kernel.org>
	<1427422087-17239-2-git-send-email-namhyung@kernel.org>
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Sender: owner-linux-mm@kvack.org
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To: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>, Ingo Molnar <mingo@kernel.org>, Peter Zijlstra <a.p.zijlstra@chello.nl>, Jiri Olsa <jolsa@redhat.com>, LKML <linux-kernel@vger.kernel.org>, David Ahern <dsahern@gmail.com>, Minchan Kim <minchan@kernel.org>, Joonsoo Kim <js1304@gmail.com>, linux-mm@kvack.org

On Fri, 27 Mar 2015 11:08:01 +0900
Namhyung Kim <namhyung@kernel.org> wrote:

> The struct page is opaque for userspace tools, so it'd be better to save
> pfn in order to identify page frames.
> 
> The textual output of $debugfs/tracing/trace file remains unchanged and
> only raw (binary) data format is changed - but thanks to libtraceevent,
> userspace tools which deal with the raw data (like perf and trace-cmd)
> can parse the format easily.  So impact on the userspace will also be
> minimal.
> 
> Based-on-patch-by: Joonsoo Kim <js1304@gmail.com>
> Acked-by: Ingo Molnar <mingo@kernel.org>
> Cc: Steven Rostedt <rostedt@goodmis.org>
> Cc: linux-mm@kvack.org
> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
> ---


Acked-by: Steven Rostedt <rostedt@goodmis.org>

-- Steve

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