From mboxrd@z Thu Jan  1 00:00:00 1970
From: Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH 2/2] mm/page_ref: add tracepoint to track down page
 reference manipulation
Date: Mon, 15 Feb 2016 20:16:02 -0500
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To: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, Michal Nazarewicz <mina86@mina86.com>, Minchan Kim <minchan@kernel.org>, Mel Gorman <mgorman@techsingularity.net>, Vlastimil Babka <vbabka@suse.cz>, "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>, Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-api@vger.kernel.org
List-Id: linux-api@vger.kernel.org

On Tue, 16 Feb 2016 09:47:20 +0900
Joonsoo Kim <iamjoonsoo.kim@lge.com> wrote:

> > They return true when CONFIG_TRACEPOINTS is configured in and the
> > tracepoint is enabled, and false otherwise.  
> 
> This implementation is what you proposed before. Please refer below
> link and source.
> 
> https://lkml.org/lkml/2015/12/9/699
> arch/x86/include/asm/msr.h

That was a year ago, how am I suppose to remember ;-)

> 
> There is header file dependency problem between mm.h and tracepoint.h.
> page_ref.h should be included in mm.h and tracepoint.h cannot
> be included in this case.

Ah, OK, I forgot about that. I'll take another look at it again.

A lot happened since then, that's all a fog to me.

-- Steve