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Subject: Re: [PATCH 2.6.14-rc2-mm2] core remove PageReserved
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Andrew Morton <akpm@osdl.org>, Hugh Dickins <hugh@veritas.com>,
       linux-kernel <linux-kernel@vger.kernel.org>
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Date: Tue, 11 Oct 2005 14:04:43 +0100
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On Maw, 2005-10-11 at 19:00 +1000, Nick Piggin wrote:
> A last caveat: the ZERO_PAGE is now refcounted and managed with rmap
> (and thus mapcounted and count towards shared rss).

32000 processes each with 2G mapped as zero pages appears to allow the
refcount to overflow ?

Alan