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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Thu, 9 Aug 2018 17:03:52 +0200
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Subject: Re: [Qemu-devel] [PATCH v1] exec: handle NULL pointer in
 flatview_read_continue
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To: Olaf Hering <olaf@aepfle.de>
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From: Paolo Bonzini <pbonzini@redhat.com>
To: Olaf Hering <olaf@aepfle.de>
Cc: Peter Crosthwaite <crosthwaite.peter@gmail.com>,
 Richard Henderson <rth@twiddle.net>,
 "open list:Overall" <qemu-devel@nongnu.org>
Message-ID: <dba2887e-a59c-d05e-1642-b22623199cc5@redhat.com>
Subject: Re: [PATCH v1] exec: handle NULL pointer in flatview_read_continue
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On 09/08/2018 16:55, Olaf Hering wrote:
>=20
>> I think the simplest fix is for the map
>> cache to set aside a zero page and return it whenever it is asked for =
a
>> ballooned page.
> Can qemu actually know if it ran into a ballooned page? I think no.

Well, xen_map_cache knows that it has run into *something like* a
ballooned page when it returns NULL. :)

Paolo


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