From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH DOCDAY] xen: write a high level description
 of the sub-arch choices for heap layout
Date: Wed, 30 Sep 2015 12:31:50 +0100
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To: Andrew Cooper <andrew.cooper3@citrix.com>, xen-devel@lists.xen.org, jbeulich@suse.com
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On Wed, 2015-09-30 at 12:10 +0100, Andrew Cooper wrote:

> > + *
> > + *             Xen heap pages are always anonymous (that is, not tied
> > + *             or accounted to any particular domain).
> > + *
> > + * - Dom heap: Memory which must be explicitly mapped, usually
> > + *             transiently with map_domain_page, in order to be
> > + *             used. va() and pa() are not valid for such memory.
> 
> While stashing pointers into domheap memory is definitely buggy.

Is this true even considering the result of e.g. map_domain_page_global?