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tcp memory pressure controls

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This patch introduces memory pressure controls for the tcp
protocol. It uses the generic socket memory pressure code
introduced in earlier patches, and fills in the
necessary data in cg_proto struct.

Signed-off-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujtisu.com>
CC: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Glauber Costa
2011-12-11 21:47:04 +00:00
committed by David S. Miller
parent e1aab161e0
commit d1a4c0b37c
10 changed files with 189 additions and 5 deletions
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43
net/core/sock.c
View File

@@ -136,6 +136,46 @@
#include <net/tcp.h>
#endif
static DEFINE_RWLOCK(proto_list_lock);
static LIST_HEAD(proto_list);
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
int mem_cgroup_sockets_init(struct cgroup *cgrp, struct cgroup_subsys *ss)
{
struct proto *proto;
int ret = 0;
read_lock(&proto_list_lock);
list_for_each_entry(proto, &proto_list, node) {
if (proto->init_cgroup) {
ret = proto->init_cgroup(cgrp, ss);
if (ret)
goto out;
}
}
read_unlock(&proto_list_lock);
return ret;
out:
list_for_each_entry_continue_reverse(proto, &proto_list, node)
if (proto->destroy_cgroup)
proto->destroy_cgroup(cgrp, ss);
read_unlock(&proto_list_lock);
return ret;
}
void mem_cgroup_sockets_destroy(struct cgroup *cgrp, struct cgroup_subsys *ss)
{
struct proto *proto;
read_lock(&proto_list_lock);
list_for_each_entry_reverse(proto, &proto_list, node)
if (proto->destroy_cgroup)
proto->destroy_cgroup(cgrp, ss);
read_unlock(&proto_list_lock);
}
#endif
/*
* Each address family might have different locking rules, so we have
* one slock key per address family:
@@ -2291,9 +2331,6 @@ void sk_common_release(struct sock *sk)
}
EXPORT_SYMBOL(sk_common_release);
static DEFINE_RWLOCK(proto_list_lock);
static LIST_HEAD(proto_list);
#ifdef CONFIG_PROC_FS
#define PROTO_INUSE_NR 64 /* should be enough for the first time */
struct prot_inuse {