1BPF_F_NO_PREALLOC 1 2BPF_F_NO_COMMON_LRU 2 3BPF_F_NUMA_NODE 4 4BPF_F_RDONLY (1U << 3) 5BPF_F_WRONLY (1U << 4) 6BPF_F_STACK_BUILD_ID (1U << 5) 7