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| author | Julian Anastasov <ja@ssi.bg> | 2013-03-21 13:58:06 +0400 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2013-04-02 02:23:42 +0400 |
| commit | 026ace060dfe29275d2188297a62fa37d6c1a02c (patch) | |
| tree | ed61c22b342c82a64ca16e97a356acff94bc930c /net/netfilter/ipvs/ip_vs_proto_sctp.c | |
| parent | 4115ded131645a7311a5d9afa9ff2b263dd91c2d (diff) | |
| download | linux-026ace060dfe29275d2188297a62fa37d6c1a02c.tar.xz | |
ipvs: optimize dst usage for real server
Currently when forwarding requests to real servers
we use dst_lock and atomic operations when cloning the
dst_cache value. As the dst_cache value does not change
most of the time it is better to use RCU and to lock
dst_lock only when we need to replace the obsoleted dst.
For this to work we keep dst_cache in new structure protected
by RCU. For packets to remote real servers we will use noref
version of dst_cache, it will be valid while we are in RCU
read-side critical section because now dst_release for replaced
dsts will be invoked after the grace period. Packets to
local real servers that are passed to local stack with
NF_ACCEPT need a dst clone.
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'net/netfilter/ipvs/ip_vs_proto_sctp.c')
0 files changed, 0 insertions, 0 deletions