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Message-ID: <20070818103146.GA6744@mail.ustc.edu.cn>
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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