Am Mon, 5 Jul 2021 09:57:21 +0200
schrieb Jan Beulich <[email protected]>:

> What is "the grant problem" referring to here? Neither anything above
> nor the offending original commit has any reference to grants, or a
> problem with them.

When the guest is paused during final transit, the backends will continue to 
write into domU memory. As a result the final additional iteration to verify 
memory on both sides will always see errors. The code has no way to know for 
which pfn such mismatches in page content can safely be ignored.


Olaf

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