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| author | Glauber Costa <glommer@parallels.com> | 2011-12-11 21:47:06 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-12-12 19:04:11 -0500 |
| commit | 3aaabe2342c36bf48567b88fa78b819eee14bb5e (patch) | |
| tree | 1364c84c53ba6382f9a9df9d6f42a3bc37427d05 /Documentation/cgroups | |
| parent | 3dc43e3e4d0b52197d3205214fe8f162f9e0c334 (diff) | |
| download | linux-3aaabe2342c36bf48567b88fa78b819eee14bb5e.tar.gz | |
tcp buffer limitation: per-cgroup limit
This patch uses the "tcp.limit_in_bytes" field of the kmem_cgroup to effectively control the amount of kernel memory pinned by a cgroup. This value is ignored in the root cgroup, and in all others, caps the value specified by the admin in the net namespaces' view of tcp_sysctl_mem. If namespaces are being used, the admin is allowed to set a value bigger than cgroup's maximum, the same way it is allowed to set pretty much unlimited values in a real box. Signed-off-by: Glauber Costa <glommer@parallels.com> Reviewed-by: Hiroyouki Kamezawa <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 'Documentation/cgroups')
| -rw-r--r-- | Documentation/cgroups/memory.txt | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt index 687dea5bf1fd..1c9779a74a25 100644 --- a/Documentation/cgroups/memory.txt +++ b/Documentation/cgroups/memory.txt @@ -78,6 +78,7 @@ Brief summary of control files. memory.independent_kmem_limit # select whether or not kernel memory limits are independent of user limits + memory.kmem.tcp.limit_in_bytes # set/show hard limit for tcp buf memory 1. History |