diff options
| author | Haishuang Yan <yanhaishuang@cmss.chinamobile.com> | 2016-12-28 17:52:33 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-12-29 11:38:31 -0500 |
| commit | fee83d097b1620530f23bf6063f4ea251ba9c8c7 (patch) | |
| tree | 64c2ff87e756a8e024308d7d9f076ae282d9c83f /net/ipv4/tcp_ipv4.c | |
| parent | 1946e672c173559155a3e210fe95dbf8b7b8ddf7 (diff) | |
| download | linux-fee83d097b1620530f23bf6063f4ea251ba9c8c7.tar.gz linux-fee83d097b1620530f23bf6063f4ea251ba9c8c7.tar.bz2 linux-fee83d097b1620530f23bf6063f4ea251ba9c8c7.zip | |
ipv4: Namespaceify tcp_max_syn_backlog knob
Different namespace application might require different maximal
number of remembered connection requests.
Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 56b5f49e3f97..7e4be4f361f3 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -2419,7 +2419,7 @@ static void __net_exit tcp_sk_exit(struct net *net) static int __net_init tcp_sk_init(struct net *net) { - int res, cpu; + int res, cpu, cnt; net->ipv4.tcp_sk = alloc_percpu(struct sock *); if (!net->ipv4.tcp_sk) @@ -2458,10 +2458,13 @@ static int __net_init tcp_sk_init(struct net *net) net->ipv4.sysctl_tcp_notsent_lowat = UINT_MAX; net->ipv4.sysctl_tcp_tw_reuse = 0; + cnt = tcp_hashinfo.ehash_mask + 1; net->ipv4.tcp_death_row.sysctl_tw_recycle = 0; - net->ipv4.tcp_death_row.sysctl_max_tw_buckets = (tcp_hashinfo.ehash_mask + 1) / 2; + net->ipv4.tcp_death_row.sysctl_max_tw_buckets = (cnt + 1) / 2; net->ipv4.tcp_death_row.hashinfo = &tcp_hashinfo; + net->ipv4.sysctl_max_syn_backlog = max(128, cnt / 256); + return 0; fail: tcp_sk_exit(net); |