Re: [RFC][PATCH v2 10/21] mm: build separate zonelist for PMEM and DRAM node

[Fengguang Wu]

On Tue, Jan 01, 2019 at 02:44:41PM +0530, Aneesh Kumar K.V wrote:
> Fengguang Wu <fengguang.wu@xxxxxxxxx> writes:
>
> > From: Fan Du <fan.du@xxxxxxxxx>
> >
> > When allocate page, DRAM and PMEM node should better not fall back to
> > each other. This allows migration code to explicitly control which type
> > of node to allocate pages from.
> >
> > With this patch, PMEM NUMA node can only be used in 2 ways:
> > - migrate in and out
> > - numactl
>
> Can we achieve this using nodemask? That way we don't tag nodes with
> different properties such as DRAM/PMEM. We can then give the
> flexibilility to the device init code to add the new memory nodes to
> the right nodemask

Aneesh, in patch 2 we did create nodemask numa_nodes_pmem and
numa_nodes_dram. What's your supposed way of "using nodemask"?

Thanks,
Fengguang