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[Xen-devel] Re: [PATCH xen-unstable] Remove PSE flag from guest CR4

To: Dave McCracken <dcm@xxxxxxxx>
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Mon, 14 Sep 2009 12:07:38 -0700
Cc: Xen Developers List <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Delivery-date: Mon, 14 Sep 2009 12:08:02 -0700
List-id: Xen developer discussion <xen-devel.lists.xensource.com>

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

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Follow-Ups:
- [Xen-devel] Re: [PATCH xen-unstable] Remove PSE flag from guest CR4
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References:
- [Xen-devel] Re: [PATCH xen-unstable] Remove PSE flag from guest CR4
  - From: Keir Fraser
- [Xen-devel] Re: [PATCH xen-unstable] Remove PSE flag from guest CR4
  - From: Dave McCracken

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