This function arms a flag (MNT_SPECIAL) on the vfs, to avoid refcounting on permanent system vfs. Use this function for sockets, pipes, anonymous fds. (socket8 bench result : from 2.94s to 2.23s) Signed-off-by: Eric Dumazet --- fs/anon_inodes.c | 2 +- fs/pipe.c | 2 +- fs/super.c | 9 +++++++++ include/linux/fs.h | 1 + include/linux/mount.h | 5 +++-- net/socket.c | 2 +- 6 files changed, 16 insertions(+), 5 deletions(-)