From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753532AbXD1JAk (ORCPT ); Sat, 28 Apr 2007 05:00:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753553AbXD1JAj (ORCPT ); Sat, 28 Apr 2007 05:00:39 -0400 Received: from smtp-out001.kontent.com ([81.88.40.215]:35765 "EHLO smtp-out.kontent.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753400AbXD1JAc convert rfc822-to-8bit (ORCPT ); Sat, 28 Apr 2007 05:00:32 -0400 From: Oliver Neukum To: David Lang Subject: Re: Back to the future. Date: Sat, 28 Apr 2007 08:58:25 +0200 User-Agent: KMail/1.9.1 Cc: Nigel Cunningham , "Rafael J. Wysocki" , Linus Torvalds , Pekka J Enberg , LKML References: <1177567481.5025.211.camel@nigel.suspend2.net> <1177718250.4737.222.camel@nigel.suspend2.net> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT Content-Disposition: inline Message-Id: <200704280858.26615.oliver@neukum.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Am Samstag, 28. April 2007 01:50 schrieb David Lang: > 3. make mounted filesystems read-only (possibly with snapshot/checkpoint) > 4. unpause > 5. save image (with full userspace available, including network) > 6. shutdown system (throw away all userspace memory, no need to do graceful >     shutdown or nice kill signals, revert filesystem to snapshot/checkpoint if >     needed) And then you'll have people wonder why the server which sent out all those files has no log entries. You'd have to selectively unfreeze user space, which is a cure worse than the desease. Simply throwing away user space work is a bug. And no, you cannot say that it'll be redone away, as you are throwing away accepted input, too. Regards Oliver