On Tue, Aug 17, 2021 at 12:47:19AM +0000, Longpeng (Mike, Cloud Infrastructure Service Product Dept.) wrote:

I understand your intent now, you want to share memory ranges by sharing the relevant
pgtable pages. 

I had implemented a similar idea to support QEMU live upgrade about four years ago
( in late 2017),

https://patents.google.com/patent/US20210089345A1

I am not going to read a patent.  This conversation is now over until
I have had a conversation with my patent attorney.