Add Joao.
On 3/7/2024 1:05 PM, Dan Williams wrote:
Jane Chu wrote:
Hi, Dan and Vishal,
What kind of NUMAness is visible to the kernel w.r.t. SysRAM region
backed by Barlopass nvdimms configured in MemoryMode by impctl ?
As always, the NUMA description, is a property of the platform not the
media type / DIMM. The ACPI HMAT desrcibes the details of a
memory-side-caches. See "5.2.27.2 Memory Side Cache Overview" in ACPI
6.4.
Thanks! So, compare to dax_kmem which assign a numa node to a newly
converted pmem/SysRAM region, w.r.t. pmem in MemoryMode, is there any
clue that kernel exposes(or could expose) to userland about the extra
latency such that userland may treat these memory regions differently?
thanks,
-jane
