From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: [PATCH xen-unstable] Remove PSE flag from guest CR4
Date: Mon, 14 Sep 2009 12:07:38 -0700
Message-ID: <4AAE947A.8010009@goop.org>
References: <C6D43F08.14B08%keir.fraser@eu.citrix.com>
	<200909141253.38621.dcm@mccr.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <200909141253.38621.dcm@mccr.org>
List-Unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: Dave McCracken <dcm@mccr.org>
Cc: Xen Developers List <xen-devel@lists.xensource.com>, Keir Fraser <keir.fraser@eu.citrix.com>
List-Id: xen-devel@lists.xenproject.org

On 09/14/09 10:53, Dave McCracken wrote:
> Linux assumes it will just work.
>
> Since hugepages in Linux are an optional feature the kernel will boot even on 
> a machine that doesn't support PSE.  Applications that use hugepages will get 
> a nasty error.
>   

That sounds like a Linux bug; at the very least, it sounds very fragile
to rely on this behaviour.

    J