path: root/include/net/inet_timewait_sock.h
diff options
authorEric W. Biederman <ebiederm@xmission.com>2009-12-03 02:29:09 +0000
committerDavid S. Miller <davem@davemloft.net>2009-12-03 12:23:47 -0800
commitb099ce2602d806deb41caaa578731848995cdb2a (patch)
tree7541d0d59c73e6b6274d420b8a3ec35d85ca5f2d /include/net/inet_timewait_sock.h
parentnet: Use rcu lookups in inet_twsk_purge. (diff)
net: Batch inet_twsk_purge
This function walks the whole hashtable so there is no point in passing it a network namespace. Instead I purge all timewait sockets from dead network namespaces that I find. If the namespace is one of the once I am trying to purge I am guaranteed no new timewait sockets can be formed so this will get them all. If the namespace is one I am not acting for it might form a few more but I will call inet_twsk_purge again and shortly to get rid of them. In any even if the network namespace is dead timewait sockets are useless. Move the calls of inet_twsk_purge into batch_exit routines so that if I am killing a bunch of namespaces at once I will just call inet_twsk_purge once and save a lot of redundant unnecessary work. My simple 4k network namespace exit test the cleanup time dropped from roughly 8.2s to 1.6s. While the time spent running inet_twsk_purge fell to about 2ms. 1ms for ipv4 and 1ms for ipv6. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
1 files changed, 3 insertions, 3 deletions
diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h
index 773b10fa38e4..4fd007f34dd5 100644
--- a/include/net/inet_timewait_sock.h
+++ b/include/net/inet_timewait_sock.h
@@ -212,14 +212,14 @@ extern void inet_twsk_schedule(struct inet_timewait_sock *tw,
extern void inet_twsk_deschedule(struct inet_timewait_sock *tw,
struct inet_timewait_death_row *twdr);
-extern void inet_twsk_purge(struct net *net, struct inet_hashinfo *hashinfo,
+extern void inet_twsk_purge(struct inet_hashinfo *hashinfo,
struct inet_timewait_death_row *twdr, int family);
static inline
struct net *twsk_net(const struct inet_timewait_sock *twsk)
- return twsk->tw_net;
+ return rcu_dereference(twsk->tw_net);
return &init_net;
@@ -229,7 +229,7 @@ static inline
void twsk_net_set(struct inet_timewait_sock *twsk, struct net *net)
- twsk->tw_net = net;
+ rcu_assign_pointer(twsk->tw_net, net);
#endif /* _INET_TIMEWAIT_SOCK_ */