On Tue, Nov 05, 2024 at 04:45:45PM +0000, Shivank Garg wrote:

This patch series introduces fbind() syscall to support NUMA memory
policies for KVM guest_memfd, allowing VMMs to configure memory placement
for guest memory. This addresses the current limitation where guest_memfd
allocations ignore NUMA policies, potentially impacting performance of
memory-locality-sensitive workloads.

Why does guest_memfd ignore numa policies?  The pagecache doesn't,
eg in vma_alloc_folio_noprof().