Re: qemu cxl memory expander shows numa_node -1

[Gregory Price <gregory.price@memverge.com>]

On Fri, Jan 26, 2024 at 12:39:26PM +0000, Jonathan Cameron wrote:
> On Thu, 25 Jan 2024 13:45:09 +0530
> Sajjan Rao <sajjanr@gmail.com> wrote:
> 
> > Looks like something changed in QEMU 8.2 that broke running code out
> > of CXL memory with KVM disabled.
> > I used "numactl --membind 2 ls" as suggested by Dimitrios earlier,
> > this worked for me until I updated to the latest QEMU.
> > 
> > Is this a known issue? Or am I missing something?
> 
> I'm confused on how the description below ever worked.
> Assigning the underlying memdev=cxl-mem1 to a numa node isn't going
> to correctly build the connections the CFMWS PA range.
> 

I've now seen 3-4 occasions where people have done this and run into
trouble (for obvious reasons).  Is there anything we can do to disallow
the double-registering of a single memdev to both a numa node and a cxl
device?

~Gregory