From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 14 Jan 2008 11:51:29 -0800 (PST) From: Christoph Lameter Subject: Re: [kvm-devel] mmu notifiers In-Reply-To: <478A03D8.9050308@qumranet.com> Message-ID: References: <20080109181908.GS6958@v2.random> <47860512.3040607@qumranet.com> <47891A5C.8060907@qumranet.com> <20080113120939.GA3221@sgi.com> <478A03D8.9050308@qumranet.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Avi Kivity Cc: Robin Holt , Andrea Arcangeli , kvm-devel@lists.sourceforge.net, linux-mm@kvack.org, Daniel J Blueman List-ID: On Sun, 13 Jan 2008, Avi Kivity wrote: > I was just explaining how kvm shares memory among guests (which does not > require mmu notifiers); if you have some other configuration that can benefit > from mmu notifiers, then, well, great. I think you have two page tables pointing to the same memory location right (not to page structs but two ptes)? Without a mmu notifier the pages in this memory range cannot be evicted because otherwise ptes of the other instance will point to a page that is now used for a different purpose. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org