diff options
| -rw-r--r-- | Documentation/cgroups/memory.txt | 2 | ||||
| -rw-r--r-- | include/linux/memcontrol.h | 1 | ||||
| -rw-r--r-- | include/net/sock.h | 2 | ||||
| -rw-r--r-- | include/net/tcp_memcontrol.h | 17 | ||||
| -rw-r--r-- | mm/memcontrol.c | 40 | ||||
| -rw-r--r-- | net/core/sock.c | 43 | ||||
| -rw-r--r-- | net/ipv4/Makefile | 1 | ||||
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 9 | ||||
| -rw-r--r-- | net/ipv4/tcp_memcontrol.c | 74 | ||||
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 5 |
10 files changed, 189 insertions, 5 deletions
diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt index 23a8dc5319a3..687dea5bf1fd 100644 --- a/Documentation/cgroups/memory.txt +++ b/Documentation/cgroups/memory.txt @@ -293,6 +293,8 @@ to trigger slab reclaim when those limits are reached. thresholds. The Memory Controller allows them to be controlled individually per cgroup, instead of globally. +* tcp memory pressure: sockets memory pressure for the tcp protocol. + 3. User Interface 0. Configuration diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index f15021b9f734..1513994ce207 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -86,6 +86,7 @@ extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm); extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg); +extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont); static inline int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) diff --git a/include/net/sock.h b/include/net/sock.h index d5eab256167c..18ecc9919d29 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -64,6 +64,8 @@ #include <net/dst.h> #include <net/checksum.h> +int mem_cgroup_sockets_init(struct cgroup *cgrp, struct cgroup_subsys *ss); +void mem_cgroup_sockets_destroy(struct cgroup *cgrp, struct cgroup_subsys *ss); /* * This structure really needs to be cleaned up. * Most of it is for TCP, and not used by any of diff --git a/include/net/tcp_memcontrol.h b/include/net/tcp_memcontrol.h new file mode 100644 index 000000000000..5f5e1582d764 --- /dev/null +++ b/include/net/tcp_memcontrol.h @@ -0,0 +1,17 @@ +#ifndef _TCP_MEMCG_H +#define _TCP_MEMCG_H + +struct tcp_memcontrol { + struct cg_proto cg_proto; + /* per-cgroup tcp memory pressure knobs */ + struct res_counter tcp_memory_allocated; + struct percpu_counter tcp_sockets_allocated; + /* those two are read-mostly, leave them at the end */ + long tcp_prot_mem[3]; + int tcp_memory_pressure; +}; + +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); +#endif /* _TCP_MEMCG_H */ diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 3de3901ae0a7..7266202fa7cf 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -50,6 +50,8 @@ #include <linux/cpu.h> #include <linux/oom.h> #include "internal.h" +#include <net/sock.h> +#include <net/tcp_memcontrol.h> #include <asm/uaccess.h> @@ -295,6 +297,10 @@ struct mem_cgroup { */ struct mem_cgroup_stat_cpu nocpu_base; spinlock_t pcp_counter_lock; + +#ifdef CONFIG_INET + struct tcp_memcontrol tcp_mem; +#endif }; /* Stuffs for move charges at task migration. */ @@ -384,6 +390,7 @@ static void mem_cgroup_put(struct mem_cgroup *memcg); #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM #ifdef CONFIG_INET #include <net/sock.h> +#include <net/ip.h> static bool mem_cgroup_is_root(struct mem_cgroup *memcg); void sock_update_memcg(struct sock *sk) @@ -418,6 +425,15 @@ void sock_release_memcg(struct sock *sk) mem_cgroup_put(memcg); } } + +struct cg_proto *tcp_proto_cgroup(struct mem_cgroup *memcg) +{ + if (!memcg || mem_cgroup_is_root(memcg)) + return NULL; + + return &memcg->tcp_mem.cg_proto; +} +EXPORT_SYMBOL(tcp_proto_cgroup); #endif /* CONFIG_INET */ #endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */ @@ -800,7 +816,7 @@ static void memcg_check_events(struct mem_cgroup *memcg, struct page *page) preempt_enable(); } -static struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont) +struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont) { return container_of(cgroup_subsys_state(cont, mem_cgroup_subsys_id), struct mem_cgroup, @@ -4732,14 +4748,34 @@ static int register_kmem_files(struct cgroup *cont, struct cgroup_subsys *ss) ret = cgroup_add_files(cont, ss, kmem_cgroup_files, ARRAY_SIZE(kmem_cgroup_files)); + + /* + * Part of this would be better living in a separate allocation + * function, leaving us with just the cgroup tree population work. + * We, however, depend on state such as network's proto_list that + * is only initialized after cgroup creation. I found the less + * cumbersome way to deal with it to defer it all to populate time + */ + if (!ret) + ret = mem_cgroup_sockets_init(cont, ss); return ret; }; +static void kmem_cgroup_destroy(struct cgroup_subsys *ss, + struct cgroup *cont) +{ + mem_cgroup_sockets_destroy(cont, ss); +} #else static int register_kmem_files(struct cgroup *cont, struct cgroup_subsys *ss) { return 0; } + +static void kmem_cgroup_destroy(struct cgroup_subsys *ss, + struct cgroup *cont) +{ +} #endif static struct cftype mem_cgroup_files[] = { @@ -5098,6 +5134,8 @@ static void mem_cgroup_destroy(struct cgroup_subsys *ss, { struct mem_cgroup *memcg = mem_cgroup_from_cont(cont); + kmem_cgroup_destroy(ss, cont); + mem_cgroup_put(memcg); } diff --git a/net/core/sock.c b/net/core/sock.c index 6a871b8fdd20..5a6a90620656 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -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 { diff --git a/net/ipv4/Makefile b/net/ipv4/Makefile index e9d98e621112..ff75d3bbcd6a 100644 --- a/net/ipv4/Makefile +++ b/net/ipv4/Makefile @@ -48,6 +48,7 @@ obj-$(CONFIG_TCP_CONG_SCALABLE) += tcp_scalable.o obj-$(CONFIG_TCP_CONG_LP) += tcp_lp.o obj-$(CONFIG_TCP_CONG_YEAH) += tcp_yeah.o obj-$(CONFIG_TCP_CONG_ILLINOIS) += tcp_illinois.o +obj-$(CONFIG_CGROUP_MEM_RES_CTLR_KMEM) += tcp_memcontrol.o obj-$(CONFIG_NETLABEL) += cipso_ipv4.o obj-$(CONFIG_XFRM) += xfrm4_policy.o xfrm4_state.o xfrm4_input.o \ diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index f48bf312cfe8..42714cb1fef3 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -73,6 +73,7 @@ #include <net/xfrm.h> #include <net/netdma.h> #include <net/secure_seq.h> +#include <net/tcp_memcontrol.h> #include <linux/inet.h> #include <linux/ipv6.h> @@ -1917,6 +1918,7 @@ static int tcp_v4_init_sock(struct sock *sk) sk->sk_rcvbuf = sysctl_tcp_rmem[1]; local_bh_disable(); + sock_update_memcg(sk); sk_sockets_allocated_inc(sk); local_bh_enable(); @@ -1974,6 +1976,7 @@ void tcp_v4_destroy_sock(struct sock *sk) } sk_sockets_allocated_dec(sk); + sock_release_memcg(sk); } EXPORT_SYMBOL(tcp_v4_destroy_sock); @@ -2634,10 +2637,14 @@ struct proto tcp_prot = { .compat_setsockopt = compat_tcp_setsockopt, .compat_getsockopt = compat_tcp_getsockopt, #endif +#ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM + .init_cgroup = tcp_init_cgroup, + .destroy_cgroup = tcp_destroy_cgroup, + .proto_cgroup = tcp_proto_cgroup, +#endif }; EXPORT_SYMBOL(tcp_prot); - static int __net_init tcp_sk_init(struct net *net) { return inet_ctl_sock_create(&net->ipv4.tcp_sock, diff --git a/net/ipv4/tcp_memcontrol.c b/net/ipv4/tcp_memcontrol.c new file mode 100644 index 000000000000..4a68d2c24556 --- /dev/null +++ b/net/ipv4/tcp_memcontrol.c @@ -0,0 +1,74 @@ +#include <net/tcp.h> +#include <net/tcp_memcontrol.h> +#include <net/sock.h> +#include <linux/memcontrol.h> +#include <linux/module.h> + +static inline struct tcp_memcontrol *tcp_from_cgproto(struct cg_proto *cg_proto) +{ + return container_of(cg_proto, struct tcp_memcontrol, cg_proto); +} + +static void memcg_tcp_enter_memory_pressure(struct sock *sk) +{ + if (!sk->sk_cgrp->memory_pressure) + *sk->sk_cgrp->memory_pressure = 1; +} +EXPORT_SYMBOL(memcg_tcp_enter_memory_pressure); + +int tcp_init_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss) +{ + /* + * The root cgroup does not use res_counters, but rather, + * rely on the data already collected by the network + * subsystem + */ + struct res_counter *res_parent = NULL; + struct cg_proto *cg_proto, *parent_cg; + struct tcp_memcontrol *tcp; + struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp); + struct mem_cgroup *parent = parent_mem_cgroup(memcg); + + cg_proto = tcp_prot.proto_cgroup(memcg); + if (!cg_proto) + return 0; + + tcp = tcp_from_cgproto(cg_proto); + + tcp->tcp_prot_mem[0] = sysctl_tcp_mem[0]; + tcp->tcp_prot_mem[1] = sysctl_tcp_mem[1]; + tcp->tcp_prot_mem[2] = sysctl_tcp_mem[2]; + tcp->tcp_memory_pressure = 0; + + parent_cg = tcp_prot.proto_cgroup(parent); + if (parent_cg) + res_parent = parent_cg->memory_allocated; + + res_counter_init(&tcp->tcp_memory_allocated, res_parent); + percpu_counter_init(&tcp->tcp_sockets_allocated, 0); + + cg_proto->enter_memory_pressure = memcg_tcp_enter_memory_pressure; + cg_proto->memory_pressure = &tcp->tcp_memory_pressure; + cg_proto->sysctl_mem = tcp->tcp_prot_mem; + cg_proto->memory_allocated = &tcp->tcp_memory_allocated; + cg_proto->sockets_allocated = &tcp->tcp_sockets_allocated; + cg_proto->memcg = memcg; + + return 0; +} +EXPORT_SYMBOL(tcp_init_cgroup); + +void tcp_destroy_cgroup(struct cgroup *cgrp, struct cgroup_subsys *ss) +{ + struct mem_cgroup *memcg = mem_cgroup_from_cont(cgrp); + struct cg_proto *cg_proto; + struct tcp_memcontrol *tcp; + + cg_proto = tcp_prot.proto_cgroup(memcg); + if (!cg_proto) + return; + + tcp = tcp_from_cgproto(cg_proto); + percpu_counter_destroy(&tcp->tcp_sockets_allocated); +} +EXPORT_SYMBOL(tcp_destroy_cgroup); diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index b69c7030aba9..95d3cfb65d39 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -62,6 +62,7 @@ #include <net/netdma.h> #include <net/inet_common.h> #include <net/secure_seq.h> +#include <net/tcp_memcontrol.h> #include <asm/uaccess.h> @@ -1994,6 +1995,7 @@ static int tcp_v6_init_sock(struct sock *sk) sk->sk_rcvbuf = sysctl_tcp_rmem[1]; local_bh_disable(); + sock_update_memcg(sk); sk_sockets_allocated_inc(sk); local_bh_enable(); @@ -2227,6 +2229,9 @@ struct proto tcpv6_prot = { .compat_setsockopt = compat_tcp_setsockopt, .compat_getsockopt = compat_tcp_getsockopt, #endif +#ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM + .proto_cgroup = tcp_proto_cgroup, +#endif }; static const struct inet6_protocol tcpv6_protocol = { |
