From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tim Deegan Subject: Re: HVM vs. PV in Reliability Date: Mon, 21 Feb 2011 10:25:36 +0000 Message-ID: <20110221102536.GA32074@whitby.uk.xensource.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Yutao Liu Cc: "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org At 12:55 +0000 on 20 Feb (1298206540), Yutao Liu wrote: > Hello,I'm wondering are there any datum that can compare the reliability/availability/dependability of HVM and PV, especially the driver of them? > For example, how many bugs found in the drivers of HVM and PV? Can any experimental datum tell HVM model is safer or otherwise?... > If a driver in HVM crashed, will it affect DomU, Dom0, or others? and what about PV? > Is there some research or paper talk about this? The conventional wisdom is that since HVM has a much bigger TCB it's probably in some sense less secure. I don't know whether anyone has done any serious measurement or analysis of that though. Tim. -- Tim Deegan Principal Software Engineer, Xen Platform Team Citrix Systems UK Ltd. (Company #02937203, SL9 0BG)