Re: [PATCH v1 0/4] vfio: report NUMA nodes for device memory

[Alex Williamson]

On Wed, 27 Sep 2023 10:53:36 -0300
Jason Gunthorpe <jgg@nvidia.com> wrote:

> On Wed, Sep 27, 2023 at 12:33:18PM +0100, Jonathan Cameron wrote:
> 
> > CXL accelerators / GPUs etc are a different question but who has one
> > of those anyway? :)  
> 
> That's exactly what I mean when I say CXL will need it too. I keep
> describing this current Grace & Hopper as pre-CXL HW. You can easially
> imagine draping CXL around it. CXL doesn't solve the problem that
> motivates all this hackying - Linux can't dynamically create NUMA
> nodes.

Why is that and why aren't we pushing towards a solution of removing
that barrier so that we don't require the machine topology to be
configured to support this use case and guest OS limitations?  Thanks,

Alex