diff options
| author | Julian Anastasov <ja@ssi.bg> | 2026-07-31 22:27:41 +0800 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2026-08-10 20:14:20 +0200 |
| commit | 04d2feaed8d0103c498727191ba04001d5100e67 (patch) | |
| tree | 66c971d135f940bc403db39787081946b183d31f /include | |
| parent | d45cc8020d7c0a9f01dee42ff5c40bc14c9af72f (diff) | |
| download | linux-04d2feaed8d0103c498727191ba04001d5100e67.tar.gz linux-04d2feaed8d0103c498727191ba04001d5100e67.zip | |
ipvs: add totalconns for dest
Replace the inactconns dest counter with totalconns, now
inactconns can be obtained from totalconns - activeconns.
This reduces the atomic inc/dec ops for TCP/SCTP from
6 to 4 if the connection is established and then closed.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Yizhou Zhao <zhaoyz24@mails.tsinghua.edu.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/ip_vs.h | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h index d2813eb795be..11f430646db8 100644 --- a/include/net/ip_vs.h +++ b/include/net/ip_vs.h @@ -987,7 +987,7 @@ struct ip_vs_dest { /* connection counters and thresholds */ atomic_t activeconns; /* active connections */ - atomic_t inactconns; /* inactive connections */ + atomic_t totalconns; /* total connections */ atomic_t persistconns; /* persistent connections */ __u32 u_threshold; /* upper threshold */ __u32 l_threshold; /* lower threshold */ @@ -2220,14 +2220,21 @@ void ip_vs_unregister_hooks(struct netns_ipvs *ipvs, unsigned int af); static inline int ip_vs_dest_conn_overhead(struct ip_vs_dest *dest) { - /* We think the overhead of processing active connections is 256 + /* We think the overhead of processing active connections is 257 * times higher than that of inactive connections in average. (This - * 256 times might not be accurate, we will change it later) We + * 257 times might not be accurate, we will change it later) We * use the following formula to estimate the overhead now: - * dest->activeconns*256 + dest->inactconns + * dest->activeconns*256 + dest->totalconns */ return (atomic_read(&dest->activeconns) << 8) + - atomic_read(&dest->inactconns); + atomic_read(&dest->totalconns); +} + +static inline int +ip_vs_dest_inactconns(const struct ip_vs_dest *dest) +{ + return max(atomic_read(&dest->totalconns) - + atomic_read(&dest->activeconns), 0); } #ifdef CONFIG_IP_VS_PROTO_TCP |