On 4/12/21 4:08 PM, Mel Gorman wrote: > On Mon, Apr 12, 2021 at 02:40:18PM +0200, Vlastimil Babka wrote: >> On 4/12/21 2:08 PM, Mel Gorman wrote: > > the pageset structures in place would be much more straight-forward > assuming the structures were not allocated in the zone that is being > hot-removed. I would expect this is not possible, at least for ZONE_MOVABLE, as the percpu allocations should be GFP_KERNEL. And it's not realistic to expect offlining to succeed at all without using ZONE_MOVABLE. AFAIK even Oscar's work on using the node to self-contain its own structures is only applicable to struct pages, not percpu allocations?
