tag	line	file	source code
expire	1184	net/ipv4/route.c	unsigned expire = RT_CACHE_TIMEOUT>>1;
expire	1196	net/ipv4/route.c	if (rth->rt_lastuse + expire*(rth->rt_refcnt+1) > now)
expire	1209	net/ipv4/route.c	expire >>= 1;