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Re: [Xen-devel] pvops DomU kernels [was Re: "Hotplug Scripts not working

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: Re: [Xen-devel] pvops DomU kernels [was Re: "Hotplug Scripts not working ..." error on jaunty]
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Sat, 24 Oct 2009 08:43:13 +0100
Cc: Boris Derzhavets <bderzhavets@xxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Dulloor <dulloor@xxxxxxxxx>, "Marc - A. Dahlhaus" <mad@xxxxxx>
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On 23/10/2009 21:58, "Jeremy Fitzhardinge" <jeremy@xxxxxxxx> wrote:

> The pte doesn't have RW set, so it must be one of the first two.
> Could it be read_pg_owner == NULL?

If real_pg_owner==NULL, that means the page belongs to noone (it is on Xen's
free list). From guest p.o.v. It isn't really any different to
real_pg_owner!=pg_owner -- in fact the test could probably be pushed inside
the latter if stmt and would make the code clearer.

 -- Keir



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