From owner-freebsd-arch@FreeBSD.ORG Sun May 22 05:09:48 2005 Return-Path: X-Original-To: freebsd-arch@freebsd.org Delivered-To: freebsd-arch@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5CEA116A41C; Sun, 22 May 2005 05:09:48 +0000 (GMT) (envelope-from boris@brooknet.com.au) Received: from bloodwood.hunterlink.net.au (smtp-local.hunterlink.net.au [203.12.144.17]) by mx1.FreeBSD.org (Postfix) with ESMTP id D752E43D1F; Sun, 22 May 2005 05:09:47 +0000 (GMT) (envelope-from boris@brooknet.com.au) Received: from ppp2C32.dyn.pacific.net.au (ppp2C32.dyn.pacific.net.au [61.8.44.50])j4M59i0m018860; Sun, 22 May 2005 15:09:45 +1000 From: Sam Lawrance To: Colin Percival In-Reply-To: <429012D3.6070803@freebsd.org> References: <428FC00B.3080909@freebsd.org> <428FD710.4060200@freebsd.org> <9e8314b53980a379445cc8c07086901d@xcllnt.net> <428FE788.8020408@freebsd.org><42900C01.10904@freebsd.org> <429012D3.6070803@freebsd.org> Content-Type: text/plain Date: Sun, 22 May 2005 15:10:28 +1000 Message-Id: <1116738628.867.33.camel@dirk.no.domain> Mime-Version: 1.0 X-Mailer: Evolution 2.2.2 FreeBSD GNOME Team Port Content-Transfer-Encoding: 7bit cc: freebsd-arch@freebsd.org Subject: Re: Scheduler fixes for hyperthreading X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 May 2005 05:09:48 -0000 On Sat, 2005-05-21 at 22:04 -0700, Colin Percival wrote: > Sam Lawrance wrote: > > I'm just curious here... would the mac_seeotheruids policy help in > > obscuring the value of any information collected by a spy process? > > Yes. It would mean that the spy could steal an SSL certificate, but > not know whose SSL certificate it was. :-) Can the spy be sure that it's not just stealing fortunes though? I mean for example, can the cache timings shown on page 7 of your paper be used to reliably identify what the other thread on the CPU is?