diff --git a/include/linux/bpf.h b/include/linux/bpf.h index f2157159b26f..132585a7fbd8 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -31,17 +31,25 @@ struct bpf_map_ops { }; struct bpf_map { - atomic_t refcnt; + /* 1st cacheline with read-mostly members of which some + * are also accessed in fast-path (e.g. ops, max_entries). + */ + const struct bpf_map_ops *ops ____cacheline_aligned; enum bpf_map_type map_type; u32 key_size; u32 value_size; u32 max_entries; u32 pages; bool unpriv_array; - struct user_struct *user; - const struct bpf_map_ops *ops; - struct work_struct work; + /* 7 bytes hole */ + + /* 2nd cacheline with misc members to avoid false sharing + * particularly with refcounting. + */ + struct user_struct *user ____cacheline_aligned; + atomic_t refcnt; atomic_t usercnt; + struct work_struct work; }; struct bpf_map_type_list {