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| author | Eric Dumazet <dada1@cosmosbay.com> | 2008-11-20 00:40:07 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-11-20 00:40:07 -0800 |
| commit | 5caea4ea7088e80ac5410d04660346094608b909 (patch) | |
| tree | fad95133683c002d24ff5de7fb756dad806b41ed /net/dccp/proto.c | |
| parent | d8b83c57a7e497cba9b5cb156e63176323035785 (diff) | |
| download | lwn-5caea4ea7088e80ac5410d04660346094608b909.tar.gz lwn-5caea4ea7088e80ac5410d04660346094608b909.zip | |
net: listening_hash get a spinlock per bucket
This patch prepares RCU migration of listening_hash table for
TCP/DCCP protocols.
listening_hash table being small (32 slots per protocol), we add
a spinlock for each slot, instead of a single rwlock for whole table.
This should reduce hold time of readers, and writers concurrency.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp/proto.c')
| -rw-r--r-- | net/dccp/proto.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/net/dccp/proto.c b/net/dccp/proto.c index bdf784c422b5..8b63394ec24c 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -44,12 +44,7 @@ atomic_t dccp_orphan_count = ATOMIC_INIT(0); EXPORT_SYMBOL_GPL(dccp_orphan_count); -struct inet_hashinfo __cacheline_aligned dccp_hashinfo = { - .lhash_lock = RW_LOCK_UNLOCKED, - .lhash_users = ATOMIC_INIT(0), - .lhash_wait = __WAIT_QUEUE_HEAD_INITIALIZER(dccp_hashinfo.lhash_wait), -}; - +struct inet_hashinfo dccp_hashinfo; EXPORT_SYMBOL_GPL(dccp_hashinfo); /* the maximum queue length for tx in packets. 0 is no limit */ @@ -1030,6 +1025,7 @@ static int __init dccp_init(void) BUILD_BUG_ON(sizeof(struct dccp_skb_cb) > FIELD_SIZEOF(struct sk_buff, cb)); + inet_hashinfo_init(&dccp_hashinfo); dccp_hashinfo.bind_bucket_cachep = kmem_cache_create("dccp_bind_bucket", sizeof(struct inet_bind_bucket), 0, |