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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-03-25 03:53:42 -0300
commit03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch)
treefa581f6dc1c0596391690d1f67eceef3af8246dc /include/linux/memcontrol.h
parentd4e493caf788ef44982e131ff9c786546904d934 (diff)
Linux-libre 4.5-gnu
Diffstat (limited to 'include/linux/memcontrol.h')
-rw-r--r--include/linux/memcontrol.h186
1 files changed, 97 insertions, 89 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index cd0e2413c..792c8981e 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -50,6 +50,9 @@ enum mem_cgroup_stat_index {
MEM_CGROUP_STAT_WRITEBACK, /* # of pages under writeback */
MEM_CGROUP_STAT_SWAP, /* # of pages, swapped out */
MEM_CGROUP_STAT_NSTATS,
+ /* default hierarchy stats */
+ MEMCG_SOCK = MEM_CGROUP_STAT_NSTATS,
+ MEMCG_NR_STAT,
};
struct mem_cgroup_reclaim_cookie {
@@ -85,37 +88,9 @@ enum mem_cgroup_events_target {
MEM_CGROUP_NTARGETS,
};
-/*
- * Bits in struct cg_proto.flags
- */
-enum cg_proto_flags {
- /* Currently active and new sockets should be assigned to cgroups */
- MEMCG_SOCK_ACTIVE,
- /* It was ever activated; we must disarm static keys on destruction */
- MEMCG_SOCK_ACTIVATED,
-};
-
-struct cg_proto {
- struct page_counter memory_allocated; /* Current allocated memory. */
- struct percpu_counter sockets_allocated; /* Current number of sockets. */
- int memory_pressure;
- long sysctl_mem[3];
- unsigned long flags;
- /*
- * memcg field is used to find which memcg we belong directly
- * Each memcg struct can hold more than one cg_proto, so container_of
- * won't really cut.
- *
- * The elegant solution would be having an inverse function to
- * proto_cgroup in struct proto, but that means polluting the structure
- * for everybody, instead of just for memcg users.
- */
- struct mem_cgroup *memcg;
-};
-
#ifdef CONFIG_MEMCG
struct mem_cgroup_stat_cpu {
- long count[MEM_CGROUP_STAT_NSTATS];
+ long count[MEMCG_NR_STAT];
unsigned long events[MEMCG_NR_EVENTS];
unsigned long nr_page_events;
unsigned long targets[MEM_CGROUP_NTARGETS];
@@ -174,6 +149,12 @@ struct mem_cgroup_thresholds {
struct mem_cgroup_threshold_ary *spare;
};
+enum memcg_kmem_state {
+ KMEM_NONE,
+ KMEM_ALLOCATED,
+ KMEM_ONLINE,
+};
+
/*
* The memory controller data structure. The memory controller controls both
* page cache and RSS per cgroup. We would eventually like to provide
@@ -185,21 +166,25 @@ struct mem_cgroup {
/* Accounted resources */
struct page_counter memory;
+ struct page_counter swap;
+
+ /* Legacy consumer-oriented counters */
struct page_counter memsw;
struct page_counter kmem;
+ struct page_counter tcpmem;
/* Normal memory consumption range */
unsigned long low;
unsigned long high;
+ /* Range enforcement for interrupt charges */
+ struct work_struct high_work;
+
unsigned long soft_limit;
/* vmpressure notifications */
struct vmpressure vmpressure;
- /* css_online() has been completed */
- int initialized;
-
/*
* Should the accounting and control be hierarchical, per subtree?
*/
@@ -246,14 +231,16 @@ struct mem_cgroup {
*/
struct mem_cgroup_stat_cpu __percpu *stat;
-#if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET)
- struct cg_proto tcp_mem;
-#endif
-#if defined(CONFIG_MEMCG_KMEM)
+ unsigned long socket_pressure;
+
+ /* Legacy tcp memory accounting */
+ bool tcpmem_active;
+ int tcpmem_pressure;
+
+#ifndef CONFIG_SLOB
/* Index in the kmem_cache->memcg_params.memcg_caches array */
int kmemcg_id;
- bool kmem_acct_activated;
- bool kmem_acct_active;
+ enum memcg_kmem_state kmem_state;
#endif
int last_scanned_node;
@@ -275,7 +262,8 @@ struct mem_cgroup {
struct mem_cgroup_per_node *nodeinfo[0];
/* WARNING: nodeinfo must be the last member here */
};
-extern struct cgroup_subsys_state *mem_cgroup_root_css;
+
+extern struct mem_cgroup *root_mem_cgroup;
/**
* mem_cgroup_events - count memory events against a cgroup
@@ -294,10 +282,12 @@ static inline void mem_cgroup_events(struct mem_cgroup *memcg,
bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg);
int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
- gfp_t gfp_mask, struct mem_cgroup **memcgp);
+ gfp_t gfp_mask, struct mem_cgroup **memcgp,
+ bool compound);
void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,
- bool lrucare);
-void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg);
+ bool lrucare, bool compound);
+void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg,
+ bool compound);
void mem_cgroup_uncharge(struct page *page);
void mem_cgroup_uncharge_list(struct list_head *page_list);
@@ -308,18 +298,34 @@ struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *);
bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg);
struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
-struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
static inline
struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){
return css ? container_of(css, struct mem_cgroup, css) : NULL;
}
+#define mem_cgroup_from_counter(counter, member) \
+ container_of(counter, struct mem_cgroup, member)
+
struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
struct mem_cgroup *,
struct mem_cgroup_reclaim_cookie *);
void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
+/**
+ * parent_mem_cgroup - find the accounting parent of a memcg
+ * @memcg: memcg whose parent to find
+ *
+ * Returns the parent memcg, or NULL if this is the root or the memory
+ * controller is in legacy no-hierarchy mode.
+ */
+static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg)
+{
+ if (!memcg->memory.parent)
+ return NULL;
+ return mem_cgroup_from_counter(memcg->memory.parent, memory);
+}
+
static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg,
struct mem_cgroup *root)
{
@@ -352,6 +358,13 @@ static inline bool mem_cgroup_disabled(void)
return !cgroup_subsys_enabled(memory_cgrp_subsys);
}
+static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
+{
+ if (mem_cgroup_disabled())
+ return true;
+ return !!(memcg->css.flags & CSS_ONLINE);
+}
+
/*
* For memory reclaim.
*/
@@ -360,20 +373,6 @@ int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
int nr_pages);
-static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec)
-{
- struct mem_cgroup_per_zone *mz;
- struct mem_cgroup *memcg;
-
- if (mem_cgroup_disabled())
- return true;
-
- mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec);
- memcg = mz->memcg;
-
- return !!(memcg->css.flags & CSS_ONLINE);
-}
-
static inline
unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
{
@@ -513,7 +512,8 @@ static inline bool mem_cgroup_low(struct mem_cgroup *root,
static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
gfp_t gfp_mask,
- struct mem_cgroup **memcgp)
+ struct mem_cgroup **memcgp,
+ bool compound)
{
*memcgp = NULL;
return 0;
@@ -521,12 +521,13 @@ static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
static inline void mem_cgroup_commit_charge(struct page *page,
struct mem_cgroup *memcg,
- bool lrucare)
+ bool lrucare, bool compound)
{
}
static inline void mem_cgroup_cancel_charge(struct page *page,
- struct mem_cgroup *memcg)
+ struct mem_cgroup *memcg,
+ bool compound)
{
}
@@ -584,13 +585,13 @@ static inline bool mem_cgroup_disabled(void)
return true;
}
-static inline bool
-mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
+static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
{
return true;
}
-static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec)
+static inline bool
+mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
{
return true;
}
@@ -671,12 +672,6 @@ void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
}
#endif /* CONFIG_MEMCG */
-enum {
- UNDER_LIMIT,
- SOFT_LIMIT,
- OVER_LIMIT,
-};
-
#ifdef CONFIG_CGROUP_WRITEBACK
struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg);
@@ -703,20 +698,33 @@ static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb,
#endif /* CONFIG_CGROUP_WRITEBACK */
struct sock;
-#if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM)
void sock_update_memcg(struct sock *sk);
void sock_release_memcg(struct sock *sk);
-#else
-static inline void sock_update_memcg(struct sock *sk)
+bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
+void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
+#ifdef CONFIG_MEMCG
+extern struct static_key_false memcg_sockets_enabled_key;
+#define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
+static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
{
+ if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure)
+ return true;
+ do {
+ if (time_before(jiffies, memcg->socket_pressure))
+ return true;
+ } while ((memcg = parent_mem_cgroup(memcg)));
+ return false;
}
-static inline void sock_release_memcg(struct sock *sk)
+#else
+#define mem_cgroup_sockets_enabled 0
+static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
{
+ return false;
}
-#endif /* CONFIG_INET && CONFIG_MEMCG_KMEM */
+#endif
-#ifdef CONFIG_MEMCG_KMEM
-extern struct static_key memcg_kmem_enabled_key;
+#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
+extern struct static_key_false memcg_kmem_enabled_key;
extern int memcg_nr_cache_ids;
void memcg_get_cache_ids(void);
@@ -732,12 +740,12 @@ void memcg_put_cache_ids(void);
static inline bool memcg_kmem_enabled(void)
{
- return static_key_false(&memcg_kmem_enabled_key);
+ return static_branch_unlikely(&memcg_kmem_enabled_key);
}
-static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg)
+static inline bool memcg_kmem_online(struct mem_cgroup *memcg)
{
- return memcg->kmem_acct_active;
+ return memcg->kmem_state == KMEM_ONLINE;
}
/*
@@ -766,15 +774,13 @@ static inline int memcg_cache_id(struct mem_cgroup *memcg)
return memcg ? memcg->kmemcg_id : -1;
}
-struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep);
+struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp);
void __memcg_kmem_put_cache(struct kmem_cache *cachep);
-static inline bool __memcg_kmem_bypass(gfp_t gfp)
+static inline bool __memcg_kmem_bypass(void)
{
if (!memcg_kmem_enabled())
return true;
- if (gfp & __GFP_NOACCOUNT)
- return true;
if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD))
return true;
return false;
@@ -791,7 +797,9 @@ static inline bool __memcg_kmem_bypass(gfp_t gfp)
static __always_inline int memcg_kmem_charge(struct page *page,
gfp_t gfp, int order)
{
- if (__memcg_kmem_bypass(gfp))
+ if (__memcg_kmem_bypass())
+ return 0;
+ if (!(gfp & __GFP_ACCOUNT))
return 0;
return __memcg_kmem_charge(page, gfp, order);
}
@@ -810,16 +818,15 @@ static __always_inline void memcg_kmem_uncharge(struct page *page, int order)
/**
* memcg_kmem_get_cache: selects the correct per-memcg cache for allocation
* @cachep: the original global kmem cache
- * @gfp: allocation flags.
*
* All memory allocated from a per-memcg cache is charged to the owner memcg.
*/
static __always_inline struct kmem_cache *
memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
{
- if (__memcg_kmem_bypass(gfp))
+ if (__memcg_kmem_bypass())
return cachep;
- return __memcg_kmem_get_cache(cachep);
+ return __memcg_kmem_get_cache(cachep, gfp);
}
static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep)
@@ -836,7 +843,7 @@ static inline bool memcg_kmem_enabled(void)
return false;
}
-static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg)
+static inline bool memcg_kmem_online(struct mem_cgroup *memcg)
{
return false;
}
@@ -872,5 +879,6 @@ memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
static inline void memcg_kmem_put_cache(struct kmem_cache *cachep)
{
}
-#endif /* CONFIG_MEMCG_KMEM */
+#endif /* CONFIG_MEMCG && !CONFIG_SLOB */
+
#endif /* _LINUX_MEMCONTROL_H */