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| author |   Eric W. Biederman <ebiederm@xmission.com> | 2009-12-03 02:29:09 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2009-12-03 12:23:47 -0800 |
| commit | b099ce2602d806deb41caaa578731848995cdb2a (patch) | |
| tree | 7541d0d59c73e6b6274d420b8a3ec35d85ca5f2d /include/net/inet_timewait_sock.h | |
| parent | net: Use rcu lookups in inet_twsk_purge. (diff) | |
| download | linux-dev-b099ce2602d806deb41caaa578731848995cdb2a.tar.xz linux-dev-b099ce2602d806deb41caaa578731848995cdb2a.zip | |
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 'include/net/inet_timewait_sock.h')
| -rw-r--r-- | include/net/inet_timewait_sock.h | 6 |
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) { #ifdef CONFIG_NET_NS - return twsk->tw_net; + return rcu_dereference(twsk->tw_net); #else return &init_net; #endif @@ -229,7 +229,7 @@ static inline void twsk_net_set(struct inet_timewait_sock *twsk, struct net *net) { #ifdef CONFIG_NET_NS - twsk->tw_net = net; + rcu_assign_pointer(twsk->tw_net, net); #endif } #endif /* _INET_TIMEWAIT_SOCK_ */ |