From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with ESMTP id 671146B01AD for ; Mon, 22 Mar 2010 17:10:54 -0400 (EDT) Date: Mon, 22 Mar 2010 21:10:41 +0000 From: Chris Webb Subject: Re: [PATCH][RF C/T/D] Unmapped page cache control - via boot parameter Message-ID: <20100322211041.GD12635@arachsys.com> References: <4B9DE635.8030208@redhat.com> <20100315080726.GB18054@balbir.in.ibm.com> <4B9DEF81.6020802@redhat.com> <20100315202353.GJ3840@arachsys.com> <4B9EC60A.2070101@codemonkey.ws> <20100317151409.GY31148@arachsys.com> <4BA0FB83.1010502@codemonkey.ws> <20100317162711.GK1997@arachsys.com> <20100322210448.GA12635@arachsys.com> <4BA7DBFB.8000808@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4BA7DBFB.8000808@redhat.com> Sender: owner-linux-mm@kvack.org To: Avi Kivity Cc: Anthony Liguori , balbir@linux.vnet.ibm.com, KVM development list , Rik van Riel , KAMEZAWA Hiroyuki , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" List-ID: Avi Kivity writes: > On 03/22/2010 11:04 PM, Chris Webb wrote: > > >Unless I'm missing something, the risk to guest OSes in this configuration > >should therefore be exactly the same as the risk from running on normal > >commodity hardware with such drives and no expensive battery-backed RAM. > > A host crash will destroy your data. If your machine is connected > to a UPS, only a firmware crash can destroy your data. Yes, that's a good point: in this configuration a host crash is equivalent to a power failure rather than a OS crash in terms of data loss. Cheers, Chris. -- 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