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authorPaolo Abeni <pabeni@redhat.com>2017-03-31 12:47:39 +0300
committerDavid S. Miller <davem@davemloft.net>2017-04-02 06:11:36 +0300
commit3d8417d79e0da6a47ff29932ef80486be78af56e (patch)
tree8754e51badc325222569b533979bbf5e36479257 /include/linux/udp.h
parent768bfa2a061f0a3aeb1080015deffd57f294c55d (diff)
downloadlinux-3d8417d79e0da6a47ff29932ef80486be78af56e.tar.xz
udp: use sk_protocol instead of pcflag to detect udplite sockets
In the udp_sock struct, the 'forward_deficit' and 'pcflag' fields share the same cacheline. While the first is dirtied by udp_recvmsg, the latter is read, possibly several times, by the bottom half processing to discriminate between udp and udplite sockets. With this patch, sk->sk_protocol is used to check is the socket is really an udplite one, avoiding some cache misses per packet and improving the performance under udp_flood with small packet up to 10%. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/udp.h')
-rw-r--r--include/linux/udp.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/udp.h b/include/linux/udp.h
index c0f530809d1f..6cb4061a720d 100644
--- a/include/linux/udp.h
+++ b/include/linux/udp.h
@@ -115,6 +115,6 @@ static inline bool udp_get_no_check6_rx(struct sock *sk)
#define udp_portaddr_for_each_entry_rcu(__sk, list) \
hlist_for_each_entry_rcu(__sk, list, __sk_common.skc_portaddr_node)
-#define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag)
+#define IS_UDPLITE(__sk) (__sk->sk_protocol == IPPROTO_UDPLITE)
#endif /* _LINUX_UDP_H */