RFC4821 say: The value for this timer MUST NOT be less than
5 minutes and is recommended to be 10 minutes, per RFC 1981.
Signed-off-by: Li RongQing <lirongq...@baidu.com>
---
net/ipv4/sysctl_net_ipv4.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index d2eed3ddcb0a..ed8952bb6874 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -47,6 +47,7 @@ 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 };
static int comp_sack_nr_max = 255;
+static int tcp_probe_interval_min = 300;
/* obsolete */
static int sysctl_tcp_low_latency __read_mostly;
@@ -711,7 +712,8 @@ static struct ctl_table ipv4_net_table[] = {
.data = &init_net.ipv4.sysctl_tcp_probe_interval,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = proc_dointvec,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &tcp_probe_interval_min,
},
{
.procname = "igmp_link_local_mcast_reports",
--
2.16.2
