On 21.10.19 19:23, David Hildenbrand wrote:
Two cleanups that popped up while working on (and discussing) virtio-mem: https://lkml.org/lkml/2019/9/19/463 Tested with DIMMs on x86. As discussed with michal in v1, I'll soon look into removing the use of PG_reserved during memory onlining completely - most probably disallowing to offline memory blocks with holes, cleaning up the onlining+offlining code.
BTW, I remember that ZONE_DEVICE pages are still required to be set PG_reserved. That has to be sorted out first. I remember that somebody was working on it a while ago but didn't hear about that again. Will look into that as well - should be as easy as adding a zone check (if there isn't a pfn_to_online_page() check already). But of course, there might be special cases ....
-- Thanks, David / dhildenb
