diff options
| 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 /include/net | |
| parent | 3dc43e3e4d0b52197d3205214fe8f162f9e0c334 (diff) | |
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 'include/net')
| -rw-r--r-- | include/net/tcp_memcontrol.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/tcp_memcontrol.h b/include/net/tcp_memcontrol.h index 5f5e1582d764..3512082fa909 100644 --- a/include/net/tcp_memcontrol.h +++ b/include/net/tcp_memcontrol.h @@ -14,4 +14,6 @@ struct tcp_memcontrol { struct cg_proto *tcp_proto_cgroup(struct mem_cgroup *memcg); int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss); void tcp_destroy_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss); +unsigned long long tcp_max_memory(const struct mem_cgroup *memcg); +void tcp_prot_mem(struct mem_cgroup *memcg, long val, int idx); #endif /* _TCP_MEMCG_H */ |