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| author | Yafang Shao <laoar.shao@gmail.com> | 2018-09-01 20:21:05 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-09-02 16:12:41 -0700 |
| commit | 743e481580b4646cde416dd549e2ecb0f16848d2 (patch) | |
| tree | 00361e1606ba513c5f8059cc13d9312abd2d7b50 /net/ipv4/tcp_ipv4.c | |
| parent | 1914104fc6f84c1fa9947f3f304a34816d1fabee (diff) | |
| download | linux-743e481580b4646cde416dd549e2ecb0f16848d2.tar.gz linux-743e481580b4646cde416dd549e2ecb0f16848d2.tar.bz2 linux-743e481580b4646cde416dd549e2ecb0f16848d2.zip | |
tcp: remove useless add operation when init sysctl_max_tw_buckets
cp_hashinfo.ehash_mask is always an odd number, which is set in function
alloc_large_system_hash(). See bellow,
if (_hash_mask)
*_hash_mask = (1 << log2qty) - 1; <<< always odd number
Hence the local variable 'cnt' is a even number, as a result of that it is
no difference to do the incrementation here.
Signed-off-by: Yafang Shao <laoar.shao@gmail.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 | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 44c09eddbb78..09547ef9c4c6 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -2549,7 +2549,7 @@ static int __net_init tcp_sk_init(struct net *net) net->ipv4.sysctl_tcp_tw_reuse = 2; cnt = tcp_hashinfo.ehash_mask + 1; - net->ipv4.tcp_death_row.sysctl_max_tw_buckets = (cnt + 1) / 2; + net->ipv4.tcp_death_row.sysctl_max_tw_buckets = cnt / 2; net->ipv4.tcp_death_row.hashinfo = &tcp_hashinfo; net->ipv4.sysctl_max_syn_backlog = max(128, cnt / 256); |