Hi, After updating to RELEASE-4.21.0 my VMI tool stopped working. My VMI tool extensively uses altp2m and sets specific access rights to various pages in the alt-views (e.g. X-only rights to achieve "invisible breakpoints"). In RELEASE-4.21.0, I noticed that the memory-access events were hitting for nonsensical pages.
After git bisecting, the offending commit appears to be 50baf2d (tools/libs/guest: Use superpages where possible on migrate/resume). I don't think the issue is really there - reverted VMs work always fine. Instead, I suspect the issue will be in incorrectly splitting altp2m superpages, since the issue always appears after manually setting memory-access rights for altp2m pages. Best, Petr
