sysctl_tcp_keepalive_probes 126 include/net/netns/ipv4.h int sysctl_tcp_keepalive_probes; sysctl_tcp_keepalive_probes 1442 include/net/tcp.h return tp->keepalive_probes ? : net->ipv4.sysctl_tcp_keepalive_probes; sysctl_tcp_keepalive_probes 893 net/ipv4/sysctl_net_ipv4.c .data = &init_net.ipv4.sysctl_tcp_keepalive_probes, sysctl_tcp_keepalive_probes 2667 net/ipv4/tcp_ipv4.c net->ipv4.sysctl_tcp_keepalive_probes = TCP_KEEPALIVE_PROBES;