diff options
| author | Eric Dumazet <dada1@cosmosbay.com> | 2008-11-17 04:40:17 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-11-17 04:40:17 +0100 |
| commit | 3ab5aee7fe840b5b1b35a8d1ac11c3de5281e611 (patch) | |
| tree | 468296b7be813643248d4ca67497d6ddb6934fc6 /net/dccp/ipv6.c | |
| parent | udp: Use hlist_nulls in UDP RCU code (diff) | |
| download | linux-3ab5aee7fe840b5b1b35a8d1ac11c3de5281e611.tar.xz linux-3ab5aee7fe840b5b1b35a8d1ac11c3de5281e611.zip | |
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/ipv6.c')
| -rw-r--r-- | net/dccp/ipv6.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c index 4aa1148cdb20..f033e845bb07 100644 --- a/net/dccp/ipv6.c +++ b/net/dccp/ipv6.c @@ -1140,6 +1140,7 @@ static struct proto dccp_v6_prot = { .orphan_count = &dccp_orphan_count, .max_header = MAX_DCCP_HEADER, .obj_size = sizeof(struct dccp6_sock), + .slab_flags = SLAB_DESTROY_BY_RCU, .rsk_prot = &dccp6_request_sock_ops, .twsk_prot = &dccp6_timewait_sock_ops, .h.hashinfo = &dccp_hashinfo, |