mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 08:02:30 +00:00
ef12947c9c
According to <linux/jump_label.h> the direct use of struct static_key is deprecated. Update the socket and slab accounting code accordingly. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: David S. Miller <davem@davemloft.net> Reported-by: Jason Baron <jbaron@akamai.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
886 lines
22 KiB
C
886 lines
22 KiB
C
/* memcontrol.h - Memory Controller
|
|
*
|
|
* Copyright IBM Corporation, 2007
|
|
* Author Balbir Singh <balbir@linux.vnet.ibm.com>
|
|
*
|
|
* Copyright 2007 OpenVZ SWsoft Inc
|
|
* Author: Pavel Emelianov <xemul@openvz.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef _LINUX_MEMCONTROL_H
|
|
#define _LINUX_MEMCONTROL_H
|
|
#include <linux/cgroup.h>
|
|
#include <linux/vm_event_item.h>
|
|
#include <linux/hardirq.h>
|
|
#include <linux/jump_label.h>
|
|
#include <linux/page_counter.h>
|
|
#include <linux/vmpressure.h>
|
|
#include <linux/eventfd.h>
|
|
#include <linux/mmzone.h>
|
|
#include <linux/writeback.h>
|
|
|
|
struct mem_cgroup;
|
|
struct page;
|
|
struct mm_struct;
|
|
struct kmem_cache;
|
|
|
|
/*
|
|
* The corresponding mem_cgroup_stat_names is defined in mm/memcontrol.c,
|
|
* These two lists should keep in accord with each other.
|
|
*/
|
|
enum mem_cgroup_stat_index {
|
|
/*
|
|
* For MEM_CONTAINER_TYPE_ALL, usage = pagecache + rss.
|
|
*/
|
|
MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
|
|
MEM_CGROUP_STAT_RSS, /* # of pages charged as anon rss */
|
|
MEM_CGROUP_STAT_RSS_HUGE, /* # of pages charged as anon huge */
|
|
MEM_CGROUP_STAT_FILE_MAPPED, /* # of pages charged as file rss */
|
|
MEM_CGROUP_STAT_DIRTY, /* # of dirty pages in page cache */
|
|
MEM_CGROUP_STAT_WRITEBACK, /* # of pages under writeback */
|
|
MEM_CGROUP_STAT_SWAP, /* # of pages, swapped out */
|
|
MEM_CGROUP_STAT_NSTATS,
|
|
};
|
|
|
|
struct mem_cgroup_reclaim_cookie {
|
|
struct zone *zone;
|
|
int priority;
|
|
unsigned int generation;
|
|
};
|
|
|
|
enum mem_cgroup_events_index {
|
|
MEM_CGROUP_EVENTS_PGPGIN, /* # of pages paged in */
|
|
MEM_CGROUP_EVENTS_PGPGOUT, /* # of pages paged out */
|
|
MEM_CGROUP_EVENTS_PGFAULT, /* # of page-faults */
|
|
MEM_CGROUP_EVENTS_PGMAJFAULT, /* # of major page-faults */
|
|
MEM_CGROUP_EVENTS_NSTATS,
|
|
/* default hierarchy events */
|
|
MEMCG_LOW = MEM_CGROUP_EVENTS_NSTATS,
|
|
MEMCG_HIGH,
|
|
MEMCG_MAX,
|
|
MEMCG_OOM,
|
|
MEMCG_NR_EVENTS,
|
|
};
|
|
|
|
/*
|
|
* Per memcg event counter is incremented at every pagein/pageout. With THP,
|
|
* it will be incremated by the number of pages. This counter is used for
|
|
* for trigger some periodic events. This is straightforward and better
|
|
* than using jiffies etc. to handle periodic memcg event.
|
|
*/
|
|
enum mem_cgroup_events_target {
|
|
MEM_CGROUP_TARGET_THRESH,
|
|
MEM_CGROUP_TARGET_SOFTLIMIT,
|
|
MEM_CGROUP_TARGET_NUMAINFO,
|
|
MEM_CGROUP_NTARGETS,
|
|
};
|
|
|
|
struct cg_proto {
|
|
struct page_counter memory_allocated; /* Current allocated memory. */
|
|
int memory_pressure;
|
|
bool active;
|
|
};
|
|
|
|
#ifdef CONFIG_MEMCG
|
|
struct mem_cgroup_stat_cpu {
|
|
long count[MEM_CGROUP_STAT_NSTATS];
|
|
unsigned long events[MEMCG_NR_EVENTS];
|
|
unsigned long nr_page_events;
|
|
unsigned long targets[MEM_CGROUP_NTARGETS];
|
|
};
|
|
|
|
struct mem_cgroup_reclaim_iter {
|
|
struct mem_cgroup *position;
|
|
/* scan generation, increased every round-trip */
|
|
unsigned int generation;
|
|
};
|
|
|
|
/*
|
|
* per-zone information in memory controller.
|
|
*/
|
|
struct mem_cgroup_per_zone {
|
|
struct lruvec lruvec;
|
|
unsigned long lru_size[NR_LRU_LISTS];
|
|
|
|
struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1];
|
|
|
|
struct rb_node tree_node; /* RB tree node */
|
|
unsigned long usage_in_excess;/* Set to the value by which */
|
|
/* the soft limit is exceeded*/
|
|
bool on_tree;
|
|
struct mem_cgroup *memcg; /* Back pointer, we cannot */
|
|
/* use container_of */
|
|
};
|
|
|
|
struct mem_cgroup_per_node {
|
|
struct mem_cgroup_per_zone zoneinfo[MAX_NR_ZONES];
|
|
};
|
|
|
|
struct mem_cgroup_threshold {
|
|
struct eventfd_ctx *eventfd;
|
|
unsigned long threshold;
|
|
};
|
|
|
|
/* For threshold */
|
|
struct mem_cgroup_threshold_ary {
|
|
/* An array index points to threshold just below or equal to usage. */
|
|
int current_threshold;
|
|
/* Size of entries[] */
|
|
unsigned int size;
|
|
/* Array of thresholds */
|
|
struct mem_cgroup_threshold entries[0];
|
|
};
|
|
|
|
struct mem_cgroup_thresholds {
|
|
/* Primary thresholds array */
|
|
struct mem_cgroup_threshold_ary *primary;
|
|
/*
|
|
* Spare threshold array.
|
|
* This is needed to make mem_cgroup_unregister_event() "never fail".
|
|
* It must be able to store at least primary->size - 1 entries.
|
|
*/
|
|
struct mem_cgroup_threshold_ary *spare;
|
|
};
|
|
|
|
/*
|
|
* The memory controller data structure. The memory controller controls both
|
|
* page cache and RSS per cgroup. We would eventually like to provide
|
|
* statistics based on the statistics developed by Rik Van Riel for clock-pro,
|
|
* to help the administrator determine what knobs to tune.
|
|
*/
|
|
struct mem_cgroup {
|
|
struct cgroup_subsys_state css;
|
|
|
|
/* Accounted resources */
|
|
struct page_counter memory;
|
|
struct page_counter memsw;
|
|
struct page_counter kmem;
|
|
|
|
/* 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?
|
|
*/
|
|
bool use_hierarchy;
|
|
|
|
/* protected by memcg_oom_lock */
|
|
bool oom_lock;
|
|
int under_oom;
|
|
|
|
int swappiness;
|
|
/* OOM-Killer disable */
|
|
int oom_kill_disable;
|
|
|
|
/* handle for "memory.events" */
|
|
struct cgroup_file events_file;
|
|
|
|
/* protect arrays of thresholds */
|
|
struct mutex thresholds_lock;
|
|
|
|
/* thresholds for memory usage. RCU-protected */
|
|
struct mem_cgroup_thresholds thresholds;
|
|
|
|
/* thresholds for mem+swap usage. RCU-protected */
|
|
struct mem_cgroup_thresholds memsw_thresholds;
|
|
|
|
/* For oom notifier event fd */
|
|
struct list_head oom_notify;
|
|
|
|
/*
|
|
* Should we move charges of a task when a task is moved into this
|
|
* mem_cgroup ? And what type of charges should we move ?
|
|
*/
|
|
unsigned long move_charge_at_immigrate;
|
|
/*
|
|
* set > 0 if pages under this cgroup are moving to other cgroup.
|
|
*/
|
|
atomic_t moving_account;
|
|
/* taken only while moving_account > 0 */
|
|
spinlock_t move_lock;
|
|
struct task_struct *move_lock_task;
|
|
unsigned long move_lock_flags;
|
|
/*
|
|
* percpu counter.
|
|
*/
|
|
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)
|
|
/* Index in the kmem_cache->memcg_params.memcg_caches array */
|
|
int kmemcg_id;
|
|
bool kmem_acct_activated;
|
|
bool kmem_acct_active;
|
|
#endif
|
|
|
|
int last_scanned_node;
|
|
#if MAX_NUMNODES > 1
|
|
nodemask_t scan_nodes;
|
|
atomic_t numainfo_events;
|
|
atomic_t numainfo_updating;
|
|
#endif
|
|
|
|
#ifdef CONFIG_CGROUP_WRITEBACK
|
|
struct list_head cgwb_list;
|
|
struct wb_domain cgwb_domain;
|
|
#endif
|
|
|
|
#ifdef CONFIG_INET
|
|
unsigned long socket_pressure;
|
|
#endif
|
|
|
|
/* List of events which userspace want to receive */
|
|
struct list_head event_list;
|
|
spinlock_t event_list_lock;
|
|
|
|
struct mem_cgroup_per_node *nodeinfo[0];
|
|
/* WARNING: nodeinfo must be the last member here */
|
|
};
|
|
|
|
extern struct mem_cgroup *root_mem_cgroup;
|
|
|
|
/**
|
|
* mem_cgroup_events - count memory events against a cgroup
|
|
* @memcg: the memory cgroup
|
|
* @idx: the event index
|
|
* @nr: the number of events to account for
|
|
*/
|
|
static inline void mem_cgroup_events(struct mem_cgroup *memcg,
|
|
enum mem_cgroup_events_index idx,
|
|
unsigned int nr)
|
|
{
|
|
this_cpu_add(memcg->stat->events[idx], nr);
|
|
cgroup_file_notify(&memcg->events_file);
|
|
}
|
|
|
|
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);
|
|
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);
|
|
void mem_cgroup_uncharge(struct page *page);
|
|
void mem_cgroup_uncharge_list(struct list_head *page_list);
|
|
|
|
void mem_cgroup_replace_page(struct page *oldpage, struct page *newpage);
|
|
|
|
struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *);
|
|
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);
|
|
|
|
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)
|
|
{
|
|
if (root == memcg)
|
|
return true;
|
|
if (!root->use_hierarchy)
|
|
return false;
|
|
return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup);
|
|
}
|
|
|
|
static inline bool mm_match_cgroup(struct mm_struct *mm,
|
|
struct mem_cgroup *memcg)
|
|
{
|
|
struct mem_cgroup *task_memcg;
|
|
bool match = false;
|
|
|
|
rcu_read_lock();
|
|
task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
|
|
if (task_memcg)
|
|
match = mem_cgroup_is_descendant(task_memcg, memcg);
|
|
rcu_read_unlock();
|
|
return match;
|
|
}
|
|
|
|
struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page);
|
|
ino_t page_cgroup_ino(struct page *page);
|
|
|
|
static inline bool mem_cgroup_disabled(void)
|
|
{
|
|
return !cgroup_subsys_enabled(memory_cgrp_subsys);
|
|
}
|
|
|
|
/*
|
|
* For memory reclaim.
|
|
*/
|
|
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)
|
|
{
|
|
struct mem_cgroup_per_zone *mz;
|
|
|
|
mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec);
|
|
return mz->lru_size[lru];
|
|
}
|
|
|
|
static inline bool mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
|
|
{
|
|
unsigned long inactive_ratio;
|
|
unsigned long inactive;
|
|
unsigned long active;
|
|
unsigned long gb;
|
|
|
|
inactive = mem_cgroup_get_lru_size(lruvec, LRU_INACTIVE_ANON);
|
|
active = mem_cgroup_get_lru_size(lruvec, LRU_ACTIVE_ANON);
|
|
|
|
gb = (inactive + active) >> (30 - PAGE_SHIFT);
|
|
if (gb)
|
|
inactive_ratio = int_sqrt(10 * gb);
|
|
else
|
|
inactive_ratio = 1;
|
|
|
|
return inactive * inactive_ratio < active;
|
|
}
|
|
|
|
void mem_cgroup_handle_over_high(void);
|
|
|
|
void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
|
|
struct task_struct *p);
|
|
|
|
static inline void mem_cgroup_oom_enable(void)
|
|
{
|
|
WARN_ON(current->memcg_may_oom);
|
|
current->memcg_may_oom = 1;
|
|
}
|
|
|
|
static inline void mem_cgroup_oom_disable(void)
|
|
{
|
|
WARN_ON(!current->memcg_may_oom);
|
|
current->memcg_may_oom = 0;
|
|
}
|
|
|
|
static inline bool task_in_memcg_oom(struct task_struct *p)
|
|
{
|
|
return p->memcg_in_oom;
|
|
}
|
|
|
|
bool mem_cgroup_oom_synchronize(bool wait);
|
|
|
|
#ifdef CONFIG_MEMCG_SWAP
|
|
extern int do_swap_account;
|
|
#endif
|
|
|
|
struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page);
|
|
void mem_cgroup_end_page_stat(struct mem_cgroup *memcg);
|
|
|
|
/**
|
|
* mem_cgroup_update_page_stat - update page state statistics
|
|
* @memcg: memcg to account against
|
|
* @idx: page state item to account
|
|
* @val: number of pages (positive or negative)
|
|
*
|
|
* See mem_cgroup_begin_page_stat() for locking requirements.
|
|
*/
|
|
static inline void mem_cgroup_update_page_stat(struct mem_cgroup *memcg,
|
|
enum mem_cgroup_stat_index idx, int val)
|
|
{
|
|
VM_BUG_ON(!rcu_read_lock_held());
|
|
|
|
if (memcg)
|
|
this_cpu_add(memcg->stat->count[idx], val);
|
|
}
|
|
|
|
static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg,
|
|
enum mem_cgroup_stat_index idx)
|
|
{
|
|
mem_cgroup_update_page_stat(memcg, idx, 1);
|
|
}
|
|
|
|
static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg,
|
|
enum mem_cgroup_stat_index idx)
|
|
{
|
|
mem_cgroup_update_page_stat(memcg, idx, -1);
|
|
}
|
|
|
|
unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
|
|
gfp_t gfp_mask,
|
|
unsigned long *total_scanned);
|
|
|
|
static inline void mem_cgroup_count_vm_event(struct mm_struct *mm,
|
|
enum vm_event_item idx)
|
|
{
|
|
struct mem_cgroup *memcg;
|
|
|
|
if (mem_cgroup_disabled())
|
|
return;
|
|
|
|
rcu_read_lock();
|
|
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
|
|
if (unlikely(!memcg))
|
|
goto out;
|
|
|
|
switch (idx) {
|
|
case PGFAULT:
|
|
this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGFAULT]);
|
|
break;
|
|
case PGMAJFAULT:
|
|
this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGMAJFAULT]);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
out:
|
|
rcu_read_unlock();
|
|
}
|
|
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
|
void mem_cgroup_split_huge_fixup(struct page *head);
|
|
#endif
|
|
|
|
#else /* CONFIG_MEMCG */
|
|
struct mem_cgroup;
|
|
|
|
static inline void mem_cgroup_events(struct mem_cgroup *memcg,
|
|
enum mem_cgroup_events_index idx,
|
|
unsigned int nr)
|
|
{
|
|
}
|
|
|
|
static inline bool mem_cgroup_low(struct mem_cgroup *root,
|
|
struct mem_cgroup *memcg)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
|
|
gfp_t gfp_mask,
|
|
struct mem_cgroup **memcgp)
|
|
{
|
|
*memcgp = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static inline void mem_cgroup_commit_charge(struct page *page,
|
|
struct mem_cgroup *memcg,
|
|
bool lrucare)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_cancel_charge(struct page *page,
|
|
struct mem_cgroup *memcg)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_uncharge(struct page *page)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_uncharge_list(struct list_head *page_list)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_replace_page(struct page *old, struct page *new)
|
|
{
|
|
}
|
|
|
|
static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
|
|
struct mem_cgroup *memcg)
|
|
{
|
|
return &zone->lruvec;
|
|
}
|
|
|
|
static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page,
|
|
struct zone *zone)
|
|
{
|
|
return &zone->lruvec;
|
|
}
|
|
|
|
static inline bool mm_match_cgroup(struct mm_struct *mm,
|
|
struct mem_cgroup *memcg)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline bool task_in_mem_cgroup(struct task_struct *task,
|
|
const struct mem_cgroup *memcg)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline struct mem_cgroup *
|
|
mem_cgroup_iter(struct mem_cgroup *root,
|
|
struct mem_cgroup *prev,
|
|
struct mem_cgroup_reclaim_cookie *reclaim)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
|
|
struct mem_cgroup *prev)
|
|
{
|
|
}
|
|
|
|
static inline bool mem_cgroup_disabled(void)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline bool
|
|
mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
static inline unsigned long
|
|
mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void
|
|
mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
|
|
int increment)
|
|
{
|
|
}
|
|
|
|
static inline void
|
|
mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
|
|
{
|
|
}
|
|
|
|
static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_handle_over_high(void)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_oom_enable(void)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_oom_disable(void)
|
|
{
|
|
}
|
|
|
|
static inline bool task_in_memcg_oom(struct task_struct *p)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool mem_cgroup_oom_synchronize(bool wait)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg,
|
|
enum mem_cgroup_stat_index idx)
|
|
{
|
|
}
|
|
|
|
static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg,
|
|
enum mem_cgroup_stat_index idx)
|
|
{
|
|
}
|
|
|
|
static inline
|
|
unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
|
|
gfp_t gfp_mask,
|
|
unsigned long *total_scanned)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void mem_cgroup_split_huge_fixup(struct page *head)
|
|
{
|
|
}
|
|
|
|
static inline
|
|
void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
|
|
{
|
|
}
|
|
#endif /* CONFIG_MEMCG */
|
|
|
|
#ifdef CONFIG_CGROUP_WRITEBACK
|
|
|
|
struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg);
|
|
struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb);
|
|
void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages,
|
|
unsigned long *pheadroom, unsigned long *pdirty,
|
|
unsigned long *pwriteback);
|
|
|
|
#else /* CONFIG_CGROUP_WRITEBACK */
|
|
|
|
static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb,
|
|
unsigned long *pfilepages,
|
|
unsigned long *pheadroom,
|
|
unsigned long *pdirty,
|
|
unsigned long *pwriteback)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_CGROUP_WRITEBACK */
|
|
|
|
struct sock;
|
|
void sock_update_memcg(struct sock *sk);
|
|
void sock_release_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);
|
|
#if defined(CONFIG_MEMCG) && defined(CONFIG_INET)
|
|
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)
|
|
{
|
|
#ifdef CONFIG_MEMCG_KMEM
|
|
if (memcg->tcp_mem.memory_pressure)
|
|
return true;
|
|
#endif
|
|
do {
|
|
if (time_before(jiffies, memcg->socket_pressure))
|
|
return true;
|
|
} while ((memcg = parent_mem_cgroup(memcg)));
|
|
return false;
|
|
}
|
|
#else
|
|
#define mem_cgroup_sockets_enabled 0
|
|
static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
|
|
{
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_MEMCG_KMEM
|
|
extern struct static_key_false memcg_kmem_enabled_key;
|
|
|
|
extern int memcg_nr_cache_ids;
|
|
void memcg_get_cache_ids(void);
|
|
void memcg_put_cache_ids(void);
|
|
|
|
/*
|
|
* Helper macro to loop through all memcg-specific caches. Callers must still
|
|
* check if the cache is valid (it is either valid or NULL).
|
|
* the slab_mutex must be held when looping through those caches
|
|
*/
|
|
#define for_each_memcg_cache_index(_idx) \
|
|
for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
|
|
|
|
static inline bool memcg_kmem_enabled(void)
|
|
{
|
|
return static_branch_unlikely(&memcg_kmem_enabled_key);
|
|
}
|
|
|
|
static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg)
|
|
{
|
|
return memcg->kmem_acct_active;
|
|
}
|
|
|
|
/*
|
|
* In general, we'll do everything in our power to not incur in any overhead
|
|
* for non-memcg users for the kmem functions. Not even a function call, if we
|
|
* can avoid it.
|
|
*
|
|
* Therefore, we'll inline all those functions so that in the best case, we'll
|
|
* see that kmemcg is off for everybody and proceed quickly. If it is on,
|
|
* we'll still do most of the flag checking inline. We check a lot of
|
|
* conditions, but because they are pretty simple, they are expected to be
|
|
* fast.
|
|
*/
|
|
int __memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order,
|
|
struct mem_cgroup *memcg);
|
|
int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order);
|
|
void __memcg_kmem_uncharge(struct page *page, int order);
|
|
|
|
/*
|
|
* helper for acessing a memcg's index. It will be used as an index in the
|
|
* child cache array in kmem_cache, and also to derive its name. This function
|
|
* will return -1 when this is not a kmem-limited memcg.
|
|
*/
|
|
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, gfp_t gfp);
|
|
void __memcg_kmem_put_cache(struct kmem_cache *cachep);
|
|
|
|
static inline bool __memcg_kmem_bypass(void)
|
|
{
|
|
if (!memcg_kmem_enabled())
|
|
return true;
|
|
if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* memcg_kmem_charge: charge a kmem page
|
|
* @page: page to charge
|
|
* @gfp: reclaim mode
|
|
* @order: allocation order
|
|
*
|
|
* Returns 0 on success, an error code on failure.
|
|
*/
|
|
static __always_inline int memcg_kmem_charge(struct page *page,
|
|
gfp_t gfp, int order)
|
|
{
|
|
if (__memcg_kmem_bypass())
|
|
return 0;
|
|
if (!(gfp & __GFP_ACCOUNT))
|
|
return 0;
|
|
return __memcg_kmem_charge(page, gfp, order);
|
|
}
|
|
|
|
/**
|
|
* memcg_kmem_uncharge: uncharge a kmem page
|
|
* @page: page to uncharge
|
|
* @order: allocation order
|
|
*/
|
|
static __always_inline void memcg_kmem_uncharge(struct page *page, int order)
|
|
{
|
|
if (memcg_kmem_enabled())
|
|
__memcg_kmem_uncharge(page, order);
|
|
}
|
|
|
|
/**
|
|
* memcg_kmem_get_cache: selects the correct per-memcg cache for allocation
|
|
* @cachep: the original global kmem cache
|
|
*
|
|
* 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())
|
|
return cachep;
|
|
return __memcg_kmem_get_cache(cachep, gfp);
|
|
}
|
|
|
|
static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep)
|
|
{
|
|
if (memcg_kmem_enabled())
|
|
__memcg_kmem_put_cache(cachep);
|
|
}
|
|
#else
|
|
#define for_each_memcg_cache_index(_idx) \
|
|
for (; NULL; )
|
|
|
|
static inline bool memcg_kmem_enabled(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void memcg_kmem_uncharge(struct page *page, int order)
|
|
{
|
|
}
|
|
|
|
static inline int memcg_cache_id(struct mem_cgroup *memcg)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
static inline void memcg_get_cache_ids(void)
|
|
{
|
|
}
|
|
|
|
static inline void memcg_put_cache_ids(void)
|
|
{
|
|
}
|
|
|
|
static inline struct kmem_cache *
|
|
memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
|
|
{
|
|
return cachep;
|
|
}
|
|
|
|
static inline void memcg_kmem_put_cache(struct kmem_cache *cachep)
|
|
{
|
|
}
|
|
#endif /* CONFIG_MEMCG_KMEM */
|
|
#endif /* _LINUX_MEMCONTROL_H */
|