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Subject: Re: [RFC] Arch option to touch newly allocated pages
To: jdike@karaya.com (Jeff Dike)
Date: Wed, 6 Mar 2002 17:33:11 +0000 (GMT)
Cc: pollard@tomcat.admin.navo.hpc.mil (Jesse Pollard),
        linux-kernel@vger.kernel.org
In-Reply-To: <200203061708.MAA02691@ccure.karaya.com> from "Jeff Dike" at Mar 06, 2002 12:08:09 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> Note that this doesn't help when the UMLs are under a smaller limit than 
> RAM + .5 * swap or whatever as happens when they are mmapping from tmpfs.
> That's the situation that I'm concerned about.

Making tmpfs enforce the policy in those modes both checking the global
overcommit and also enforcing a "must be able to fill in the pages between
start and end of file" for the tmpfs file size itself is not hard from
inspection. If its needed I can add that next update to the address
accounting.
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