Fix up tcp_mem initiail settings to take into account the size of the hash entries (different on SMP and non-SMP systems). Signed-off-by: John Heffner --- commit d4ef8c8245c0a033622ce9ba9e25d379475254f6 tree 5377b8af0bac3b92161188e7369a84e472b5acb2 parent ea55b7c31b47edf90132baea9a088da3bbe2bb5c author John Heffner Tue, 14 Nov 2006 14:53:27 -0500 committer John Heffner Tue, 14 Nov 2006 14:53:27 -0500 net/ipv4/tcp.c | 7 ++++--- 1 files changed, 4 insertions(+), 3 deletions(-) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 4322318..c05e8ed 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);