path: root/include/net/udplite.h
diff options
authorPaolo Abeni <pabeni@redhat.com>2017-05-16 11:20:14 +0200
committerDavid S. Miller <davem@davemloft.net>2017-05-16 15:41:29 -0400
commit2276f58ac5890e58d2b6a48b95493faff7347e3a (patch)
treec77ce6fd0b942dfddb145e1ad6dbb2fb1942d849 /include/net/udplite.h
parentnet/sock: factor out dequeue/peek with offset code (diff)
udp: use a separate rx queue for packet reception
under udp flood the sk_receive_queue spinlock is heavily contended. This patch try to reduce the contention on such lock adding a second receive queue to the udp sockets; recvmsg() looks first in such queue and, only if empty, tries to fetch the data from sk_receive_queue. The latter is spliced into the newly added queue every time the receive path has to acquire the sk_receive_queue lock. The accounting of forward allocated memory is still protected with the sk_receive_queue lock, so udp_rmem_release() needs to acquire both locks when the forward deficit is flushed. On specific scenarios we can end up acquiring and releasing the sk_receive_queue lock multiple times; that will be covered by the next patch Suggested-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/udplite.h')
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/udplite.h b/include/net/udplite.h
index ea340524f99b..b7a18f63d86d 100644
--- a/include/net/udplite.h
+++ b/include/net/udplite.h
@@ -26,8 +26,8 @@ static __inline__ int udplite_getfrag(void *from, char *to, int offset,
/* Designate sk as UDP-Lite socket */
static inline int udplite_sk_init(struct sock *sk)
+ udp_init_sock(sk);
udp_sk(sk)->pcflag = UDPLITE_BIT;
- sk->sk_destruct = udp_destruct_sock;
return 0;