[RFC][PATCH v2 00/21] PMEM NUMA node and hotness accounting/migration

Michal Hocko mhocko at kernel.org
Fri Jan 11 03:42:48 AEDT 2019

On Thu 10-01-19 10:53:17, Jerome Glisse wrote:
> On Tue, Jan 08, 2019 at 03:52:56PM +0100, Michal Hocko wrote:
> > On Wed 02-01-19 12:21:10, Jonathan Cameron wrote:
> > [...]
> > > So ideally I'd love this set to head in a direction that helps me tick off
> > > at least some of the above usecases and hopefully have some visibility on
> > > how to address the others moving forwards,
> > 
> > Is it sufficient to have such a memory marked as movable (aka only have
> > ZONE_MOVABLE)? That should rule out most of the kernel allocations and
> > it fits the "balance by migration" concept.
> This would not work for GPU, GPU driver really want to be in total
> control of their memory yet sometimes they want to migrate some part
> of the process to their memory.

But that also means that GPU doesn't really fit the model discussed
here, right? I thought HMM is the way to manage such a memory.
Michal Hocko

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