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dlm: use TCP_NODELAY

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Nagling doesn't help and can sometimes hurt dlm comms.

Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
David Teigland 2010-11-12 11:12:55 -06:00
parent dcce240ead
commit cb2d45da81
1 changed files with 10 additions and 0 deletions
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10
fs/dlm/lowcomms.c
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@ -926,6 +926,7 @@ static void tcp_connect_to_sock(struct connection *con)
struct sockaddr_storage saddr, src_addr; struct sockaddr_storage saddr, src_addr;
int addr_len; int addr_len;
struct socket *sock = NULL; struct socket *sock = NULL;
int one = 1;
if (con->nodeid == 0) { if (con->nodeid == 0) {
log_print("attempt to connect sock 0 foiled"); log_print("attempt to connect sock 0 foiled");
@ -971,6 +972,11 @@ static void tcp_connect_to_sock(struct connection *con)
make_sockaddr(&saddr, dlm_config.ci_tcp_port, &addr_len); make_sockaddr(&saddr, dlm_config.ci_tcp_port, &addr_len);
log_print("connecting to %d", con->nodeid); log_print("connecting to %d", con->nodeid);
/* Turn off Nagle's algorithm */
kernel_setsockopt(sock, SOL_TCP, TCP_NODELAY, (char *)&one,
sizeof(one));
result = result =
sock->ops->connect(sock, (struct sockaddr *)&saddr, addr_len, sock->ops->connect(sock, (struct sockaddr *)&saddr, addr_len,
O_NONBLOCK); O_NONBLOCK);
@ -1022,6 +1028,10 @@ static struct socket *tcp_create_listen_sock(struct connection *con,
goto create_out; goto create_out;
} }
/* Turn off Nagle's algorithm */
kernel_setsockopt(sock, SOL_TCP, TCP_NODELAY, (char *)&one,
sizeof(one));
result = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, result = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
(char *)&one, sizeof(one)); (char *)&one, sizeof(one));