From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762314AbYDPLMr (ORCPT ); Wed, 16 Apr 2008 07:12:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757258AbYDPLMi (ORCPT ); Wed, 16 Apr 2008 07:12:38 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.31.123]:41409 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756735AbYDPLMi (ORCPT ); Wed, 16 Apr 2008 07:12:38 -0400 Date: Wed, 16 Apr 2008 13:12:37 +0200 From: Pavel Machek To: Alan Jenkins Cc: Ben Nizette , linux-kernel@vger.kernel.org Subject: Re: RFC: Self-snapshotting in Linux Message-ID: <20080416111237.GA32432@atrey.karlin.mff.cuni.cz> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Ben Nizette wrote: > > 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 > > I guess there is the hardware / drivers issue. I would like to claim > I've found hibernation to be reliable but unfortunately that's not > 100% true. So debug it, it is open source after all. Or at least file a bugs. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html