ARENA_SIZE
__uint(max_entries, ARENA_SIZE / PAGE_SIZE);
page2 = bpf_arena_alloc_pages(&arena, (void __arena *)(ARENA_SIZE - 2 * PAGE_SIZE),
no_page = bpf_arena_alloc_pages(&arena, (void __arena *)ARENA_SIZE - PAGE_SIZE,
no_page = bpf_arena_alloc_pages(&arena, (void __arena *)ARENA_SIZE,