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Subject: Re: [v5 PATCH] arm64: mm: force write fault for atomic RMW
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To: David Hildenbrand <david@redhat.com>,
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From: Ryan Roberts <ryan.roberts@arm.com>
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>> I don't think that really applies in your migration
>> case, because you are definitely going to write all the memory eventually, I
>> think?
> 
> Especially with memory ballooning and things like free-page-reporting we might
> be migrating a whole bunch of zero-memory and only have to make sure that the
> destination is actually zero. We don't want to consume memory.

Ahh you know if the contents of a page being migrated is all zero. In that case,
I get it. Thanks!