Re: [PATCH v2 0/2] mm: Memory offlining + page isolation cleanups

[Michal Hocko]

On Tue 22-10-19 10:32:11, David Hildenbrand wrote:
[...]
> E.g., arch/x86/kvm/mmu.c:kvm_is_mmio_pfn()

Thanks for these references. I am not really familiar with kvm so I
cannot really comment on the specific code but I am wondering why
it simply doesn't check for ZONE_DEVICE explicitly? Also we do care
about holes in RAM (from the early boot), those should be reserved
already AFAIR. So we are left with hotplugged memory with holes and
I am not really sure we should bother with this until there is a clear
usecase in sight.
-- 
Michal Hocko
SUSE Labs