From 52bf376c63eebe72e862a1a6e713976b038c3f50 Mon Sep 17 00:00:00 2001 From: John Heffner <jheffner@psc.edu> Date: Tue, 14 Nov 2006 20:25:17 -0800 Subject: [PATCH] [TCP]: Fix up sysctl_tcp_mem initialization. Fix up tcp_mem initial settings to take into account the size of the hash entries (different on SMP and non-SMP systems). Signed-off-by: John Heffner <jheffner@psc.edu> Signed-off-by: David S. Miller <davem@davemloft.net> --- net/ipv4/tcp.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 4322318ab332..c05e8edaf544 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2316,9 +2316,10 @@ void __init tcp_init(void) sysctl_max_syn_backlog = 128; } - sysctl_tcp_mem[0] = 768 << order; - sysctl_tcp_mem[1] = 1024 << order; - sysctl_tcp_mem[2] = 1536 << order; + /* Allow no more than 3/4 kernel memory (usually less) allocated to TCP */ + sysctl_tcp_mem[0] = (1536 / sizeof (struct inet_bind_hashbucket)) << order; + sysctl_tcp_mem[1] = sysctl_tcp_mem[0] * 4 / 3; + sysctl_tcp_mem[2] = sysctl_tcp_mem[0] * 2; limit = ((unsigned long)sysctl_tcp_mem[1]) << (PAGE_SHIFT - 7); max_share = min(4UL*1024*1024, limit); -- GitLab