On Mon, Feb 12, 2024 at 6:14 AM David Hildenbrand <david@xxxxxxxxxx> wrote: > > How easy is this to access+use by unprivileged userspace? not possible. bpf arena requires cap_bpf + cap_perfmon. > arena_vm_fault() seems to allocate new pages simply via > alloc_page(GFP_KERNEL | __GFP_ZERO); No memory accounting, mlock limit > checks etc. Right. That's a bug. As Kumar commented on the patch 5 that it needs to move to memcg accounting the way we do for all other maps. It will be very similar to bpf_map_kmalloc_node().
