ip_rt_mtu_expires 126 net/ipv4/route.c static int ip_rt_mtu_expires __read_mostly = 10 * 60 * HZ; ip_rt_mtu_expires 1031 net/ipv4/route.c time_before(jiffies, dst->expires - ip_rt_mtu_expires / 2)) ip_rt_mtu_expires 1039 net/ipv4/route.c jiffies + ip_rt_mtu_expires); ip_rt_mtu_expires 3330 net/ipv4/route.c .data = &ip_rt_mtu_expires,