diff options
| author | John Heffner <jheffner@psc.edu> | 2006-11-14 20:25:17 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-11-15 21:18:51 -0800 |
| commit | 52bf376c63eebe72e862a1a6e713976b038c3f50 (patch) | |
| tree | 2bc19582770c2e2d55bc55c4faf7b15ac14228b4 /net | |
| parent | 337dde798dd1f3e4d4df4e684a0b4355dd65103d (diff) | |
| download | lwn-52bf376c63eebe72e862a1a6e713976b038c3f50.tar.gz lwn-52bf376c63eebe72e862a1a6e713976b038c3f50.zip | |
[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>
Diffstat (limited to 'net')
| -rw-r--r-- | 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 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); |