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authorBenjamin LaHaise <bcrl@kvack.org>2006-01-03 14:10:46 -0800
committerDavid S. Miller <davem@davemloft.net>2006-01-03 14:10:46 -0800
commitfd19f329a32bdc4eb07885e0b3889567cfe00aa7 (patch)
treec69943e8294cae13df6af3dc8b8c25abab8c9cfb /include/net/af_unix.h
parent4947d3ef8de7b4f42aed6ea9ba689dc8fb45b5a5 (diff)
downloadop-kernel-dev-fd19f329a32bdc4eb07885e0b3889567cfe00aa7.zip
op-kernel-dev-fd19f329a32bdc4eb07885e0b3889567cfe00aa7.tar.gz
[AF_UNIX]: Convert to use a spinlock instead of rwlock
From: Benjamin LaHaise <bcrl@kvack.org> In af_unix, a rwlock is used to protect internal state. At least on my P4 with HT it is faster to use a spinlock due to the simpler memory barrier used to unlock. This patch raises bw_unix to ~690K/s. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/af_unix.h')
-rw-r--r--include/net/af_unix.h10
1 files changed, 5 insertions, 5 deletions
diff --git a/include/net/af_unix.h b/include/net/af_unix.h
index 3f302ae..bfc1779 100644
--- a/include/net/af_unix.h
+++ b/include/net/af_unix.h
@@ -58,10 +58,10 @@ struct unix_skb_parms {
#define UNIXCB(skb) (*(struct unix_skb_parms*)&((skb)->cb))
#define UNIXCREDS(skb) (&UNIXCB((skb)).creds)
-#define unix_state_rlock(s) read_lock(&unix_sk(s)->lock)
-#define unix_state_runlock(s) read_unlock(&unix_sk(s)->lock)
-#define unix_state_wlock(s) write_lock(&unix_sk(s)->lock)
-#define unix_state_wunlock(s) write_unlock(&unix_sk(s)->lock)
+#define unix_state_rlock(s) spin_lock(&unix_sk(s)->lock)
+#define unix_state_runlock(s) spin_unlock(&unix_sk(s)->lock)
+#define unix_state_wlock(s) spin_lock(&unix_sk(s)->lock)
+#define unix_state_wunlock(s) spin_unlock(&unix_sk(s)->lock)
#ifdef __KERNEL__
/* The AF_UNIX socket */
@@ -76,7 +76,7 @@ struct unix_sock {
struct sock *other;
struct sock *gc_tree;
atomic_t inflight;
- rwlock_t lock;
+ spinlock_t lock;
wait_queue_head_t peer_wait;
};
#define unix_sk(__sk) ((struct unix_sock *)__sk)
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