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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2009-11-12 09:33:09 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-13 20:46:58 -0800 |
| commit | 2c1409a0a2b88585ec0c03f1de0aafa178c56313 (patch) | |
| tree | e9fc25badfb716e5368079535f548cc8e4b5576a /net/ipv4/inetpeer.c | |
| parent | 234b27c3fd58fc0e15c04dd0fbf4337fac9c2a06 (diff) | |
| download | blackbird-op-linux-2c1409a0a2b88585ec0c03f1de0aafa178c56313.tar.gz blackbird-op-linux-2c1409a0a2b88585ec0c03f1de0aafa178c56313.zip | |
inetpeer: Optimize inet_getid()
While investigating for network latencies, I found inet_getid() was a
contention point for some workloads, as inet_peer_idlock is shared
by all inet_getid() users regardless of peers.
One way to fix this is to make ip_id_count an atomic_t instead
of __u16, and use atomic_add_return().
In order to keep sizeof(struct inet_peer) = 64 on 64bit arches
tcp_ts_stamp is also converted to __u32 instead of "unsigned long".
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/inetpeer.c')
| -rw-r--r-- | net/ipv4/inetpeer.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/net/ipv4/inetpeer.c b/net/ipv4/inetpeer.c index b1fbe18feb5a..6bcfe52a9c87 100644 --- a/net/ipv4/inetpeer.c +++ b/net/ipv4/inetpeer.c @@ -67,9 +67,6 @@ * ip_id_count: idlock */ -/* Exported for inet_getid inline function. */ -DEFINE_SPINLOCK(inet_peer_idlock); - static struct kmem_cache *peer_cachep __read_mostly; #define node_height(x) x->avl_height @@ -390,7 +387,7 @@ struct inet_peer *inet_getpeer(__be32 daddr, int create) n->v4daddr = daddr; atomic_set(&n->refcnt, 1); atomic_set(&n->rid, 0); - n->ip_id_count = secure_ip_id(daddr); + atomic_set(&n->ip_id_count, secure_ip_id(daddr)); n->tcp_ts_stamp = 0; write_lock_bh(&peer_pool_lock); |
