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ipv4: Remove unnecessary code from rt_check_expire().

Browse source 
IPv4 routing cache entries no longer use dst->expires, because the
metrics, PMTU, and redirect information are stored in the inetpeer
cache.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-06-26 00:10:09 -07:00
parent 29cb99de4d
commit df67e6c9a6
1 changed files with 11 additions and 23 deletions
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30
net/ipv4/route.c
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@ -870,34 +870,22 @@ static void rt_check_expire(void)
while ((rth = rcu_dereference_protected(*rthp, while ((rth = rcu_dereference_protected(*rthp,
lockdep_is_held(rt_hash_lock_addr(i)))) != NULL) { lockdep_is_held(rt_hash_lock_addr(i)))) != NULL) {
prefetch(rth->dst.rt_next); prefetch(rth->dst.rt_next);
if (rt_is_expired(rth)) { if (rt_is_expired(rth) ||
rt_may_expire(rth, tmo, ip_rt_gc_timeout)) {
*rthp = rth->dst.rt_next; *rthp = rth->dst.rt_next;
rt_free(rth); rt_free(rth);
continue; continue;
} }
if (rth->dst.expires) {
/* Entry is expired even if it is in use */ /* We only count entries on a chain with equal
if (time_before_eq(jiffies, rth->dst.expires)) { * hash inputs once so that entries for
nofree: * different QOS levels, and other non-hash
* input attributes don't unfairly skew the
* length computation
*/
tmo >>= 1; tmo >>= 1;
rthp = &rth->dst.rt_next; rthp = &rth->dst.rt_next;
/*
* We only count entries on
* a chain with equal hash inputs once
* so that entries for different QOS
* levels, and other non-hash input
* attributes don't unfairly skew
* the length computation
*/
length += has_noalias(rt_hash_table[i].chain, rth); length += has_noalias(rt_hash_table[i].chain, rth);
continue;
}
} else if (!rt_may_expire(rth, tmo, ip_rt_gc_timeout))
goto nofree;
/* Cleanup aged off entries. */
*rthp = rth->dst.rt_next;
rt_free(rth);
} }
spin_unlock_bh(rt_hash_lock_addr(i)); spin_unlock_bh(rt_hash_lock_addr(i));
sum += length; sum += length;