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(parent: 213b15c) | patch
udp: use atomic_inc_not_zero_hint
authorEric Dumazet <eric.dumazet@gmail.com>
Mon, 15 Nov 2010 19:58:26 +0000 (19:58 +0000)
committerDavid S. Miller <davem@davemloft.net>
Tue, 16 Nov 2010 19:17:43 +0000 (11:17 -0800)
commitc31504dc0d1dc853dcee509d9999169a9097a717
tree8ee1d5616b7140759cf742ef89cf9f7ba1c01b20tree | snapshot (tar.gz zip)
parent213b15ca818adf7766cd7162c2159a6ecdd3bab8commit | diff
udp: use atomic_inc_not_zero_hint

UDP sockets refcount is usually 2, unless an incoming frame is going to
be queued in receive or backlog queue.

Using atomic_inc_not_zero_hint() permits to reduce latency, because
processor issues less memory transactions.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/sock.h diff | blob | blame | history
net/ipv4/udp.c diff | blob | blame | history
net/ipv6/udp.c diff | blob | blame | history