Date: Wed, 20 Sep 2000 09:04:32 +0200 (CEST) From: Marius Bendiksen <mbendiks@eunet.no> To: Terry Lambert <tlambert@primenet.com> Cc: Christopher Stein <stein@eecs.harvard.edu>, freebsd-fs@FreeBSD.ORG Subject: Re: how mmap buffer writes handled? Message-ID: <Pine.BSF.4.05.10009200903040.30002-100000@login-1.eunet.no> In-Reply-To: <200009190615.XAA13756@usr02.primenet.com>
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> > use some of the protection facilities or such to force an exception to be > > raised when accessing the page for write, and updating the statistics > > based on that. > as being dirty. If you look at the VM code, you will see that > the page is actually mapped elsewhere, and the page not present > fault is trapped, and then looked up in a translation table, 8-p. Indeed, so it does. But why would we have code to handle this on i386? Marius (PS: The method you mentioned would still qualify as "force an exception to be raised when accessing the page for write" ;) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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