Re: [PATCH v6.1 04/27] af_unix: Try to run GC async.

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

✅ All tests passed successfully. No issues detected.
No action required from the submitter.

The upstream commit SHA1 provided is correct: d9f21b3613337b55cc9d4a6ead484dca68475143

WARNING: Author mismatch between patch and upstream commit:
Backport author: Lee Jones<lee@kernel.org>
Commit author: Kuniyuki Iwashima<kuniyu@amazon.com>

Status in newer kernel trees:
6.14.y | Present (exact SHA1)
6.12.y | Present (exact SHA1)
6.6.y | Not found

Note: The patch differs from the upstream commit:
---
1:  d9f21b3613337 ! 1:  61310f376dac5 af_unix: Try to run GC async.
    @@ Metadata
      ## Commit message ##
         af_unix: Try to run GC async.
     
    +    [ Upstream commit d9f21b3613337b55cc9d4a6ead484dca68475143 ]
    +
         If more than 16000 inflight AF_UNIX sockets exist and the garbage
         collector is not running, unix_(dgram|stream)_sendmsg() call unix_gc().
         Also, they wait for unix_gc() to complete.
    @@ Commit message
         Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
         Link: https://lore.kernel.org/r/20240123170856.41348-6-kuniyu@amazon.com
         Signed-off-by: Jakub Kicinski <kuba@kernel.org>
    +    (cherry picked from commit d9f21b3613337b55cc9d4a6ead484dca68475143)
    +    Signed-off-by: Lee Jones <lee@kernel.org>
     
      ## include/net/af_unix.h ##
     @@
    @@ include/net/af_unix.h
      void unix_inflight(struct user_struct *user, struct file *fp);
      void unix_notinflight(struct user_struct *user, struct file *fp);
      void unix_destruct_scm(struct sk_buff *skb);
    - void io_uring_destruct_scm(struct sk_buff *skb);
      void unix_gc(void);
     -void wait_for_unix_gc(void);
     -struct unix_sock *unix_get_socket(struct file *filp);
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.6.y        |  Success    |  Success   |