linux-kernel - Re: [PATCH 4/4] maps: /proc/<pid>/pmaps interface

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Date:	Sat, 18 Aug 2007 18:31:46 +0800
From:	Fengguang Wu <wfg@...l.ustc.edu.cn>
To:	Matt Mackall <mpm@...enic.com>
Cc:	Andrew Morton <akpm@...l.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	David Rientjes <rientjes@...gle.com>,
	John Berthels <jjberthels@...il.com>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] maps: /proc/<pid>/pmaps interface - memory maps in
	granularity of pages

On Sat, Aug 18, 2007 at 01:40:42AM -0500, Matt Mackall wrote:
> > > - you don't get page frame numbers
> > 
> > True. I guess PFNs are meaningless to a normal user?
> 
> They're useful for anyone who's trying to look at the system as a
> whole.

To answer the question: "who are sharing this page with me"?
PFNs are not the only option. The tuple dev/ino/offset can also
uniquely identify the shared page :)

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