diff options
| author | Glauber Costa | 2011-12-11 22:47:05 +0100 |
|---|---|---|
| committer | David S. Miller | 2011-12-13 01:04:11 +0100 |
| commit | 3dc43e3e4d0b52197d3205214fe8f162f9e0c334 (patch) | |
| tree | 1770affeb483a6b4f06cde9f2a2f1289b41496d6 /net/ipv4/tcp.c | |
| parent | tcp memory pressure controls (diff) | |
| download | kernel-qcow2-linux-3dc43e3e4d0b52197d3205214fe8f162f9e0c334.tar.gz kernel-qcow2-linux-3dc43e3e4d0b52197d3205214fe8f162f9e0c334.tar.xz kernel-qcow2-linux-3dc43e3e4d0b52197d3205214fe8f162f9e0c334.zip | |
per-netns ipv4 sysctl_tcp_mem
This patch allows each namespace to independently set up
its levels for tcp memory pressure thresholds. This patch
alone does not buy much: we need to make this values
per group of process somehow. This is achieved in the
patches that follows in this patchset.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
CC: David S. Miller <davem@davemloft.net>
CC: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp.c')
| -rw-r--r-- | net/ipv4/tcp.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 43dfccce62e9..9bcdec3ad772 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -282,11 +282,9 @@ int sysctl_tcp_fin_timeout __read_mostly = TCP_FIN_TIMEOUT; struct percpu_counter tcp_orphan_count; EXPORT_SYMBOL_GPL(tcp_orphan_count); -long sysctl_tcp_mem[3] __read_mostly; int sysctl_tcp_wmem[3] __read_mostly; int sysctl_tcp_rmem[3] __read_mostly; -EXPORT_SYMBOL(sysctl_tcp_mem); EXPORT_SYMBOL(sysctl_tcp_rmem); EXPORT_SYMBOL(sysctl_tcp_wmem); @@ -3278,14 +3276,9 @@ void __init tcp_init(void) sysctl_tcp_max_orphans = cnt / 2; sysctl_max_syn_backlog = max(128, cnt / 256); - limit = nr_free_buffer_pages() / 8; - limit = max(limit, 128UL); - sysctl_tcp_mem[0] = limit / 4 * 3; - sysctl_tcp_mem[1] = limit; - sysctl_tcp_mem[2] = sysctl_tcp_mem[0] * 2; - /* Set per-socket limits to no more than 1/128 the pressure threshold */ - limit = ((unsigned long)sysctl_tcp_mem[1]) << (PAGE_SHIFT - 7); + limit = ((unsigned long)init_net.ipv4.sysctl_tcp_mem[1]) + << (PAGE_SHIFT - 7); max_share = min(4UL*1024*1024, limit); sysctl_tcp_wmem[0] = SK_MEM_QUANTUM; |