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Date: Tue, 31 May 2005 09:56:40 -0700
From: Chris Wright <chrisw@osdl.org>
To: Greg Stark <gsstark@mit.edu>
Cc: Arjan van de Ven <arjan@infradead.org>, Chris Wright <chrisw@osdl.org>,
       Linus Torvalds <torvalds@osdl.org>, Rik van Riel <riel@redhat.com>,
       linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] prevent NULL mmap in topdown model
Message-ID: <20050531165640.GL27549@shell0.pdx.osdl.net>
References: <Pine.LNX.4.61.0505181556190.3645@chimarrao.boston.redhat.com> <Pine.LNX.4.58.0505181535210.18337@ppc970.osdl.org> <Pine.LNX.4.61.0505182224250.29123@chimarrao.boston.redhat.com> <Pine.LNX.4.58.0505181946300.2322@ppc970.osdl.org> <20050519064657.GH23013@shell0.pdx.osdl.net> <1116490511.6027.25.camel@laptopd505.fenrus.org> <87u0klybpq.fsf@stark.xeocode.com>
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* Greg Stark (gsstark@mit.edu) wrote:
> More realistically, iirc either Wine or dosemu, i forget which, actually has
> to map page 0 to work properly.

Yup, this is well-known, and the patch does not effect MAP_FIXED.

http://kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=49a43876b935c811cfd29d8fe998a6912a1cc5c4

thanks,
-chris