We clone a running VM in 2 seconds (2022)

Interesting read—thanks! One question: in the CoW example, if VM A modifies the data post-fork, what does VM B see when it later copies that data? Does it get the original data from the time of the fork, or VM A’s modified version?

I talk a bit about this here: https://codesandbox.io/blog/cloning-microvms-using-userfault.... Before VM A updates its data, the data is copied over to VM B if VM B hadn't written/read that data yet.