From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robin Holt Subject: Re: [PATCH] mmu notifiers #v5 Date: Thu, 31 Jan 2008 20:23:22 -0600 Message-ID: <20080201022321.GZ26420@sgi.com> References: <20080131045750.855008281@sgi.com> <20080131171806.GN7185@v2.random> <20080131232842.GQ7185@v2.random> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Andrea Arcangeli , Peter Zijlstra , linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, steiner-sJ/iWh9BUns@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Avi Kivity , kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, daniel.blueman-xqY44rlHlBpWk0Htik3J/w@public.gmane.org, Robin Holt To: Christoph Lameter Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org On Thu, Jan 31, 2008 at 05:37:21PM -0800, Christoph Lameter wrote: > On Fri, 1 Feb 2008, Andrea Arcangeli wrote: > > > I appreciate the review! I hope my entirely bug free and > > strightforward #v5 will strongly increase the probability of getting > > this in sooner than later. If something else it shows the approach I > > prefer to cover GRU/KVM 100%, leaving the overkill mutex locking > > requirements only to the mmu notifier users that can't deal with the > > scalar and finegrined and already-taken/trashed PT lock. > > Mutex locking? Could you be more specific? I think he is talking about the external locking that xpmem will need to do to ensure we are not able to refault pages inside of regions that are undergoing recall/page table clearing. At least that has been my understanding to this point. Thanks, Robin ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/