Messages in this thread Patch in this message | | | From | Eliezer Tamir <> | Subject | [PATCH v5 net-next 3/5] tcp: add TCP support for low latency receive poll. | Date | Mon, 27 May 2013 10:44:21 +0300 |
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adds busy-poll support for TCP.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Tested-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Eliezer Tamir <eliezer.tamir@linux.intel.com> ---
net/ipv4/tcp.c | 5 +++++ net/ipv4/tcp_input.c | 1 + net/ipv4/tcp_ipv4.c | 2 ++ 3 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index d87ce72..652c75a 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -279,6 +279,7 @@ #include <asm/uaccess.h> #include <asm/ioctls.h> +#include <net/ll_poll.h> int sysctl_tcp_fin_timeout __read_mostly = TCP_FIN_TIMEOUT; @@ -1551,6 +1552,10 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, struct sk_buff *skb; u32 urg_hole = 0; + if (sk_valid_ll(sk) && skb_queue_empty(&sk->sk_receive_queue) + && (sk->sk_state == TCP_ESTABLISHED)) + sk_poll_ll(sk, nonblock); + lock_sock(sk); err = -ENOTCONN; diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 9579e1a..4d82939 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -74,6 +74,7 @@ #include <linux/ipsec.h> #include <asm/unaligned.h> #include <net/netdma.h> +#include <net/ll_poll.h> int sysctl_tcp_timestamps __read_mostly = 1; int sysctl_tcp_window_scaling __read_mostly = 1; diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index d20ede0..35fd8bc 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -75,6 +75,7 @@ #include <net/netdma.h> #include <net/secure_seq.h> #include <net/tcp_memcontrol.h> +#include <net/ll_poll.h> #include <linux/inet.h> #include <linux/ipv6.h> @@ -2011,6 +2012,7 @@ process: if (sk_filter(sk, skb)) goto discard_and_relse; + sk_mark_ll(sk, skb); skb->dev = NULL; bh_lock_sock_nested(sk);
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