aboutsummaryrefslogtreecommitdiffstats
path: root/net/dccp/proto.c
diff options
context:
space:
mode:
authorEric Dumazet <dada1@cosmosbay.com>2008-11-16 22:40:17 -0500
committerDavid S. Miller <davem@davemloft.net>2008-11-16 22:40:17 -0500
commit3ab5aee7fe840b5b1b35a8d1ac11c3de5281e611 (patch)
tree468296b7be813643248d4ca67497d6ddb6934fc6 /net/dccp/proto.c
parent88ab1932eac721c6e7336708558fa5ed02c85c80 (diff)
net: Convert TCP & DCCP hash tables to use RCU / hlist_nulls
RCU was added to UDP lookups, using a fast infrastructure : - sockets kmem_cache use SLAB_DESTROY_BY_RCU and dont pay the price of call_rcu() at freeing time. - hlist_nulls permits to use few memory barriers. This patch uses same infrastructure for TCP/DCCP established and timewait sockets. Thanks to SLAB_DESTROY_BY_RCU, no slowdown for applications using short lived TCP connections. A followup patch, converting rwlocks to spinlocks will even speedup this case. __inet_lookup_established() is pretty fast now we dont have to dirty a contended cache line (read_lock/read_unlock) Only established and timewait hashtable are converted to RCU (bind table and listen table are still using traditional locking) 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.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 46cb3490d48e..1117d4d8c8f1 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -1090,8 +1090,8 @@ static int __init dccp_init(void)
1090 } 1090 }
1091 1091
1092 for (i = 0; i < dccp_hashinfo.ehash_size; i++) { 1092 for (i = 0; i < dccp_hashinfo.ehash_size; i++) {
1093 INIT_HLIST_HEAD(&dccp_hashinfo.ehash[i].chain); 1093 INIT_HLIST_NULLS_HEAD(&dccp_hashinfo.ehash[i].chain, i);
1094 INIT_HLIST_HEAD(&dccp_hashinfo.ehash[i].twchain); 1094 INIT_HLIST_NULLS_HEAD(&dccp_hashinfo.ehash[i].twchain, i);
1095 } 1095 }
1096 1096
1097 if (inet_ehash_locks_alloc(&dccp_hashinfo)) 1097 if (inet_ehash_locks_alloc(&dccp_hashinfo))