diff options
| author | Eric Dumazet <edumazet@google.com> | 2016-04-01 08:52:21 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-04 22:11:20 -0400 |
| commit | a9d6532b567489196dac4ce60c62343e43228759 (patch) | |
| tree | 950186e21f38670eb26eca351a96970a613494ad /net/can | |
| parent | 9caad864151e525929d323de96cad382da49c3b2 (diff) | |
ipv4: tcp: set SOCK_USE_WRITE_QUEUE for ip_send_unicast_reply()
TCP uses per cpu 'sockets' to send some packets :
- RST packets ( tcp_v4_send_reset()) )
- ACK packets for SYN_RECV and TIMEWAIT sockets
By setting SOCK_USE_WRITE_QUEUE flag, we tell sock_wfree()
to not call sk_write_space() since these internal sockets
do not care.
This gives a small performance improvement, merely by allowing
cpu to properly predict the sock_wfree() conditional branch,
and avoiding one atomic operation.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/can')
0 files changed, 0 insertions, 0 deletions