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From 804fbb3f2ec9283f7b778e057a68bfff440a0be6 Mon Sep 17 00:00:00 2001
From: Rui Salvaterra <rsalvaterra@gmail.com>
Date: Wed, 30 Mar 2022 22:51:55 +0100
Subject: [PATCH] kernel: ct: size the hashtable more adequately
To set the default size of the connection tracking hash table, a divider of
16384 becomes inadequate for a router handling lots of connections. Divide by
2048 instead, making the default size scale better with the available RAM.
Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
---
net/netfilter/nf_conntrack_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -2576,7 +2576,7 @@ int nf_conntrack_init_start(void)
if (!nf_conntrack_htable_size) {
nf_conntrack_htable_size
- = (((nr_pages << PAGE_SHIFT) / 16384)
+ = (((nr_pages << PAGE_SHIFT) / 2048)
/ sizeof(struct hlist_head));
if (BITS_PER_LONG >= 64 &&
nr_pages > (4 * (1024 * 1024 * 1024 / PAGE_SIZE)))
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