On Fri, Oct 21, 2022, Chao Peng wrote: > > > > In the context of userspace inaccessible memfd, what would be a > > suggested way to enforce NUMA memory policy for physical memory > > allocation? mbind[1] won't work here in absence of virtual address > > range. > > How about set_mempolicy(): > https://www.man7.org/linux/man-pages/man2/set_mempolicy.2.html Andy Lutomirski brought this up in an off-list discussion way back when the whole private-fd thing was first being proposed. : The current Linux NUMA APIs (mbind, move_pages) work on virtual addresses. If : we want to support them for TDX private memory, we either need TDX private : memory to have an HVA or we need file-based equivalents. Arguably we should add : fmove_pages and fbind syscalls anyway, since the current API is quite awkward : even for tools like numactl.
