The prequeue has been removed from the kernel. If we leave
the tcp_low_latency in kernel, it may confuse the users.
If users can't find the option, the doc may tell them why.
So we remove also the sysctl about tcp_low_latency.
Signed-off-by: Tonghao Zhang <zhangtong...@didichuxing.com>
---
Documentation/networking/ip-sysctl.txt | 2 +-
net/ipv4/sysctl_net_ipv4.c | 10 ----------
2 files changed, 1 insertion(+), 11 deletions(-)
diff --git a/Documentation/networking/ip-sysctl.txt
b/Documentation/networking/ip-sysctl.txt
index 77f4de59dc9c..ac35f5b59739 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -356,7 +356,7 @@ tcp_l3mdev_accept - BOOLEAN
compiled with CONFIG_NET_L3_MASTER_DEV.
tcp_low_latency - BOOLEAN
- This is a legacy option, it has no effect anymore.
+ This is an obsolete option, it has been removed from kernel.
tcp_max_orphans - INTEGER
Maximal number of TCP sockets not attached to any user file handle,
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 4602af6d5358..dfebbfcccb87 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -45,9 +45,6 @@ static int tcp_syn_retries_max = MAX_TCP_SYNCNT;
static int ip_ping_group_range_min[] = { 0, 0 };
static int ip_ping_group_range_max[] = { GID_T_MAX, GID_T_MAX };
-/* obsolete */
-static int sysctl_tcp_low_latency __read_mostly;
-
/* Update system visible IP port range */
static void set_local_port_range(struct net *net, int range[2])
{
@@ -438,13 +435,6 @@ static struct ctl_table ipv4_table[] = {
.extra1 = &one,
},
{
- .procname = "tcp_low_latency",
- .data = &sysctl_tcp_low_latency,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec
- },
- {
.procname = "tcp_congestion_control",
.mode = 0644,
.maxlen = TCP_CA_NAME_MAX,
--
2.13.6
