linux-kernel - Re: [PATCH 2/2] mm/page_ref: add tracepoint to track down page reference manipulation

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Date:	Mon, 15 Feb 2016 20:16:02 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Nazarewicz <mina86@...a86.com>,
	Minchan Kim <minchan@...nel.org>,
	Mel Gorman <mgorman@...hsingularity.net>,
	Vlastimil Babka <vbabka@...e.cz>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	linux-api@...r.kernel.org
Subject: Re: [PATCH 2/2] mm/page_ref: add tracepoint to track down page
 reference manipulation

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