From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kip Macy Subject: Re: Seamlessly sharing identical memory pages among domains Date: Thu, 20 May 2004 20:58:52 -0700 (PDT) Sender: xen-devel-admin@lists.sourceforge.net Message-ID: <20040520205407.Q70577@demos.bsdclusters.com> References: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Return-path: In-Reply-To: Errors-To: xen-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Ian Pratt Cc: "Scheer, Roque" , xen-devel@lists.sourceforge.net List-Id: xen-devel@lists.xenproject.org > > Doing a proper shared cache is slightly trickier given the > paravirtualised memory interface -- we'd have to introduce guests > to a new kind of write fault: "A write fault has occurred, and > you'll have to copy the page because this machine page is > immutable as it is already shared with other domains". Modifying > Linux to handle this wouldn't be hard. Would this just involve adding an extra error code to what x86 already uses and then modifying the guest to understand that that error code means that the page has to be COWed? -Kip ------------------------------------------------------- This SF.Net email is sponsored by: Oracle 10g Get certified on the hottest thing ever to hit the market... Oracle 10g. Take an Oracle 10g class now, and we'll give you the exam FREE. http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click