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-rw-r--r--include/net/tcp.h1
-rw-r--r--net/core/request_sock.c16
-rw-r--r--net/ipv4/tcp_ipv4.c16
3 files changed, 16 insertions, 17 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index a2e323c54457..f730935b824a 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -564,7 +564,6 @@ static __inline__ int tcp_sk_listen_hashfn(struct sock *sk)
#define TCP_NAGLE_PUSH 4 /* Cork is overriden for already queued data */
/* sysctl variables for tcp */
-extern int sysctl_max_syn_backlog;
extern int sysctl_tcp_timestamps;
extern int sysctl_tcp_window_scaling;
extern int sysctl_tcp_sack;
diff --git a/net/core/request_sock.c b/net/core/request_sock.c
index 78fd60a46bf2..bb55675f0685 100644
--- a/net/core/request_sock.c
+++ b/net/core/request_sock.c
@@ -18,6 +18,22 @@
#include <net/request_sock.h>
+/*
+ * Maximum number of SYN_RECV sockets in queue per LISTEN socket.
+ * One SYN_RECV socket costs about 80bytes on a 32bit machine.
+ * It would be better to replace it with a global counter for all sockets
+ * but then some measure against one socket starving all other sockets
+ * would be needed.
+ *
+ * It was 128 by default. Experiments with real servers show, that
+ * it is absolutely not enough even at 100conn/sec. 256 cures most
+ * of problems. This value is adjusted to 128 for very small machines
+ * (<=32Mb of memory) and to 1024 on normal or better ones (>=256Mb).
+ * Further increasing requires to change hash table size.
+ */
+int sysctl_max_syn_backlog = 256;
+EXPORT_SYMBOL(sysctl_max_syn_backlog);
+
int reqsk_queue_alloc(struct request_sock_queue *queue,
const int nr_table_entries)
{
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 485ca9cb1707..2d41d5d6ad19 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1366,21 +1366,6 @@ static inline struct ip_options *tcp_v4_save_options(struct sock *sk,
return dopt;
}
-/*
- * Maximum number of SYN_RECV sockets in queue per LISTEN socket.
- * One SYN_RECV socket costs about 80bytes on a 32bit machine.
- * It would be better to replace it with a global counter for all sockets
- * but then some measure against one socket starving all other sockets
- * would be needed.
- *
- * It was 128 by default. Experiments with real servers show, that
- * it is absolutely not enough even at 100conn/sec. 256 cures most
- * of problems. This value is adjusted to 128 for very small machines
- * (<=32Mb of memory) and to 1024 on normal or better ones (>=256Mb).
- * Further increasing requires to change hash table size.
- */
-int sysctl_max_syn_backlog = 256;
-
struct request_sock_ops tcp_request_sock_ops = {
.family = PF_INET,
.obj_size = sizeof(struct tcp_request_sock),
@@ -2662,7 +2647,6 @@ EXPORT_SYMBOL(tcp_proc_register);
EXPORT_SYMBOL(tcp_proc_unregister);
#endif
EXPORT_SYMBOL(sysctl_local_port_range);
-EXPORT_SYMBOL(sysctl_max_syn_backlog);
EXPORT_SYMBOL(sysctl_tcp_low_latency);
EXPORT_SYMBOL(sysctl_tcp_tw_reuse);