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[Xen-devel] Re: [PATCH xen-unstable] Remove PSE flag from guest CR4
| To: | Dave McCracken <dcm@xxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: [PATCH xen-unstable] Remove PSE flag from guest CR4 |
| 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 |
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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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