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Re: [Xen-devel] bogus gfn - mfn - gfn - mfn checks in guest_physmap_add_

To: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Subject: Re: [Xen-devel] bogus gfn - mfn - gfn - mfn checks in guest_physmap_add_entry
From: Olaf Hering <olaf@xxxxxxxxx>
Date: Wed, 24 Nov 2010 20:58:28 +0100
Cc: Patrick Colp <pjcolp@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On Wed, Nov 24, Olaf Hering wrote:

> On Wed, Nov 24, Tim Deegan wrote:

> > Another option would be to audit all callers of p2m_is_ram() and check
> > whether they can handle paged-out PFNs (which I though had already been
> > done but seems not to be).  Keir's VCPU yield patch might be useful in
> > some of those places too.
> 
> I think most if not all is caught by my changes already.

A quick grep shows there are a few places that need an audit wether or
not the paging types can be removed from p2m_is_ram().

Olaf

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