From 317fe0e6c5dc9448bcef41a2e31fecfd3dba7f55 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 16 Jun 2010 04:52:13 +0000 Subject: inetpeer: restore small inet_peer structures Addition of rcu_head to struct inet_peer added 16bytes on 64bit arches. Thats a bit unfortunate, since old size was exactly 64 bytes. This can be solved, using an union between this rcu_head an four fields, that are normally used only when a refcount is taken on inet_peer. rcu_head is used only when refcnt=-1, right before structure freeing. Add a inet_peer_refcheck() function to check this assertion for a while. We can bring back SLAB_HWCACHE_ALIGN qualifier in kmem cache creation. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv4/route.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/ipv4/route.c') diff --git a/net/ipv4/route.c b/net/ipv4/route.c index a291edbbc97f..03430de46166 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -2881,6 +2881,7 @@ static int rt_fill_info(struct net *net, error = rt->dst.error; expires = rt->dst.expires ? rt->dst.expires - jiffies : 0; if (rt->peer) { + inet_peer_refcheck(rt->peer); id = atomic_read(&rt->peer->ip_id_count) & 0xffff; if (rt->peer->tcp_ts_stamp) { ts = rt->peer->tcp_ts; -- cgit v1.2.3