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

[Michal Hocko]

On Tue 22-10-19 10:15:07, David Hildenbrand wrote:
> On 22.10.19 10:08, Michal Hocko wrote:
> > On Tue 22-10-19 08:52:28, David Hildenbrand wrote:
> > > 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.
> > 
> > Do they?
> 
> Yes, especially KVM code :/

Details please?
-- 
Michal Hocko
SUSE Labs