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Subject: Re: [RFC][PATCH 4/7] RSS accounting hooks over the code
From: Dave Hansen <hansendc@us.ibm.com>
To: Kirill Korotaev <dev@sw.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>, containers@lists.osdl.org,
       Paul Menage <menage@google.com>, Pavel Emelianov <xemul@sw.ru>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Date: Mon, 12 Mar 2007 09:50:08 -0700
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On Mon, 2007-03-12 at 19:23 +0300, Kirill Korotaev wrote:
> 
> For these you essentially need per-container page->_mapcount counter,
> otherwise you can't detect whether rss group still has the page in question being mapped
> in its processes' address spaces or not. 

What do you mean by this?  You can always tell whether a process has a
particular page mapped.  Could you explain the issue a bit more.  I'm
not sure I get it.

-- Dave