netdev - [PATCH RFC net-next 4/4] tcp: Enable 2nd listener hashtable in TCP

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Date:   Mon, 20 Nov 2017 15:47:22 -0800
From:   Martin KaFai Lau <kafai@...com>
To:     netdev <netdev@...r.kernel.org>
CC:     "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Kernel Team <kernel-team@...com>
Subject: [PATCH RFC net-next 4/4] tcp: Enable 2nd listener hashtable in TCP

Enable the second listener hashtable in TCP.
The scale is the same as UDP which is one slot per 2MB.

Signed-off-by: Martin KaFai Lau <kafai@...com>
---
 net/ipv4/tcp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index bf97317e6c97..180311636023 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -3577,6 +3577,9 @@ void __init tcp_init(void)
 	percpu_counter_init(&tcp_sockets_allocated, 0, GFP_KERNEL);
 	percpu_counter_init(&tcp_orphan_count, 0, GFP_KERNEL);
 	inet_hashinfo_init(&tcp_hashinfo);
+	inet_hashinfo2_init(&tcp_hashinfo, "tcp_listen_portaddr_hash",
+			    thash_entries, 21,  /* one slot per 2 MB*/
+			    0, 64 * 1024);
 	tcp_hashinfo.bind_bucket_cachep =
 		kmem_cache_create("tcp_bind_bucket",
 				  sizeof(struct inet_bind_bucket), 0,
-- 
2.9.5