On Thu, Mar 25, 2021 at 4:10 PM Joao Martins <joao.m.martins@xxxxxxxxxx> wrote: > > @altmap is stored in a dev_pagemap, but it will be repurposed for > hotplug memory for storing the memmap in the hotplugged memory[*] and > reusing the altmap infrastructure to that end. This is to say that > altmap can't be replaced with a @pgmap as it is going to cover more than > dev_pagemap backend altmaps. I was going to say, just pass the pgmap and lookup the altmap from pgmap, but Oscar added a use case for altmap independent of pgmap. So you might refresh this commit message to clarify why passing pgmap by itself is not sufficient. Other than that, looks good.
