[PATCH v2 net-next 0/4] af_unix: Random improvements for GC.

[Kuniyuki Iwashima <kuniyu@amazon.com>]

If more than 16000 inflight AF_UNIX sockets exist on a host, each
sendmsg() will be forced to wait for unix_gc() even if a process
is not sending any FD.

This series tries not to impose such a penalty on sane users.


Changes:
  v2:
    Patch 4: Fix build error when CONFIG_UNIX=n (kernel test robot)

  v1: https://lore.kernel.org/netdev/20231122013629.28554-1-kuniyu@amazon.com/


Kuniyuki Iwashima (4):
  af_unix: Do not use atomic ops for unix_sk(sk)->inflight.
  af_unix: Return struct unix_sock from unix_get_socket().
  af_unix: Run GC on only one CPU.
  af_unix: Try to run GC async.

 include/linux/io_uring.h |  4 +-
 include/net/af_unix.h    |  6 +--
 include/net/scm.h        |  1 +
 io_uring/io_uring.c      |  5 ++-
 net/core/scm.c           |  5 +++
 net/unix/af_unix.c       | 10 +++--
 net/unix/garbage.c       | 84 ++++++++++++++++++----------------------
 net/unix/scm.c           | 34 ++++++++--------
 8 files changed, 74 insertions(+), 75 deletions(-)

-- 
2.30.2