From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761999AbYDPJtW (ORCPT ); Wed, 16 Apr 2008 05:49:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756453AbYDPJtM (ORCPT ); Wed, 16 Apr 2008 05:49:12 -0400 Received: from outbound.icp-qv1-irony-out2.iinet.net.au ([203.59.1.107]:10133 "EHLO outbound.icp-qv1-irony-out2.iinet.net.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756408AbYDPJtM (ORCPT ); Wed, 16 Apr 2008 05:49:12 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AhYBAKdoBUh8qMMq/2dsb2JhbAAIrkc X-IronPort-AV: E=Sophos;i="4.25,664,1199631600"; d="scan'208";a="302955609" Subject: Re: RFC: Self-snapshotting in Linux From: Ben Nizette To: Peter Teoh Cc: LKML , Kernel Newbies In-Reply-To: <804dabb00804160144j25584229t6673bc182fa13b3@mail.gmail.com> References: <804dabb00804160144j25584229t6673bc182fa13b3@mail.gmail.com> Content-Type: text/plain Organization: Nias Digital Date: Wed, 16 Apr 2008 19:49:07 +1000 Message-Id: <1208339347.3361.35.camel@moss.renham> Mime-Version: 1.0 X-Mailer: Evolution 2.12.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2008-04-16 at 16:44 +0800, Peter Teoh wrote: > Essentially, to reiterate the key idea: able to snapshot the current > kernel+userspace permanent.....restore from another snapshot....and > then switch back again if needed etc.....will the implementation be > difficult...if not impossible???? > As I see it the main thing is that VMWare doesn't have to worry about trying to put hardware in to (and pull out of) low power modes. VMWare hardware is never left in an undefined state by poorly written drivers etc. I think hibernation is about what you want; snapshotting as you describe it should fall down for about the same reasons :-) --Ben.