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SubjectRe: [PATCH v11 4/6] mm: function to offer a page block on the free list
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On 06/12/2017 09:28 AM, Michael S. Tsirkin wrote:
>
>> The hypervisor is going to throw away the contents of these pages,
>> right?
> It should be careful and only throw away contents that was there before
> report_unused_page_block was invoked. Hypervisor is responsible for not
> corrupting guest memory. But that's not something an mm patch should
> worry about.

That makes sense. I'm struggling to imagine how the hypervisor makes
use of this information, though. Does it make the pages read-only
before this, and then it knows if there has not been a write *and* it
gets notified via this new mechanism that it can throw the page away?

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