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Re: [Qemu-devel] [PATCH v1] exec: handle NULL pointer in flatview_read_c

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH v1] exec: handle NULL pointer in flatview_read_continue
Date: Thu, 9 Aug 2018 17:03:52 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1

On 09/08/2018 16:55, Olaf Hering wrote:
>> 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. :)


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