diff options
| author | Eric Dumazet <edumazet@google.com> | 2026-03-04 04:27:47 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-03-05 04:53:34 +0300 |
| commit | c66e0f453d1afa82534383c58d503238a43fa76c (patch) | |
| tree | 21e31a861c8e9528b41223830d0f6c286f609a3c /include/linux | |
| parent | 39ae83b0f557969c461d93c608545443a2f5c307 (diff) | |
| download | linux-c66e0f453d1afa82534383c58d503238a43fa76c.tar.xz | |
net: use ktime_t in struct scm_timestamping_internal
Instead of using struct timespec64 in scm_timestamping_internal,
use ktime_t, saving 24 bytes in kernel stack.
This makes tcp_update_recv_tstamps() small enough to be inlined.
The ktime_t -> timespec64 conversions happen after socket lock
has been released in tcp_recvmsg(), and only if the application
requested them.
$ scripts/bloat-o-meter -t vmlinux.0 vmlinux
add/remove: 0/2 grow/shrink: 5/4 up/down: 146/-277 (-131)
Function old new delta
tcp_zerocopy_receive 2383 2425 +42
mptcp_recvmsg 1565 1607 +42
tcp_recvmsg_locked 3797 3823 +26
put_cmsg_scm_timestamping64 131 149 +18
put_cmsg_scm_timestamping 131 149 +18
__pfx_tcp_update_recv_tstamps 16 - -16
do_tcp_getsockopt 4024 4006 -18
tcp_recv_timestamp 474 430 -44
tcp_zc_handle_leftover 417 371 -46
__sock_recv_timestamp 1087 1031 -56
tcp_update_recv_tstamps 97 - -97
Total: Before=25223788, After=25223657, chg -0.00%
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Jason Xing <kerneljasonxing@gmail.com>
Link: https://patch.msgid.link/20260304012747.881644-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/socket.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/socket.h b/include/linux/socket.h index ec715ad4bf25..ec4a0a025793 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -415,7 +415,7 @@ struct __kernel_timespec; struct old_timespec32; struct scm_timestamping_internal { - struct timespec64 ts[3]; + ktime_t ts[3]; }; extern void put_cmsg_scm_timestamping64(struct msghdr *msg, struct scm_timestamping_internal *tss); |