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authorLinus Torvalds <torvalds@linux-foundation.org>2014-12-11 05:34:42 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-11 05:34:42 +0300
commitb6da0076bab5a12afb19312ffee41c95490af2a0 (patch)
tree52a5675b9c2ff95d88b981d5b9a3822f6073c112 /include
parentcbfe0de303a55ed96d8831c2d5f56f8131cd6612 (diff)
parenta53b831549141aa060a8b54b76e3a42870d74cc0 (diff)
downloadlinux-b6da0076bab5a12afb19312ffee41c95490af2a0.tar.xz
Merge branch 'akpm' (patchbomb from Andrew)
Merge first patchbomb from Andrew Morton: - a few minor cifs fixes - dma-debug upadtes - ocfs2 - slab - about half of MM - procfs - kernel/exit.c - panic.c tweaks - printk upates - lib/ updates - checkpatch updates - fs/binfmt updates - the drivers/rtc tree - nilfs - kmod fixes - more kernel/exit.c - various other misc tweaks and fixes * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (190 commits) exit: pidns: fix/update the comments in zap_pid_ns_processes() exit: pidns: alloc_pid() leaks pid_namespace if child_reaper is exiting exit: exit_notify: re-use "dead" list to autoreap current exit: reparent: call forget_original_parent() under tasklist_lock exit: reparent: avoid find_new_reaper() if no children exit: reparent: introduce find_alive_thread() exit: reparent: introduce find_child_reaper() exit: reparent: document the ->has_child_subreaper checks exit: reparent: s/while_each_thread/for_each_thread/ in find_new_reaper() exit: reparent: fix the cross-namespace PR_SET_CHILD_SUBREAPER reparenting exit: reparent: fix the dead-parent PR_SET_CHILD_SUBREAPER reparenting exit: proc: don't try to flush /proc/tgid/task/tgid exit: release_task: fix the comment about group leader accounting exit: wait: drop tasklist_lock before psig->c* accounting exit: wait: don't use zombie->real_parent exit: wait: cleanup the ptrace_reparented() checks usermodehelper: kill the kmod_thread_locker logic usermodehelper: don't use CLONE_VFORK for ____call_usermodehelper() fs/hfs/catalog.c: fix comparison bug in hfs_cat_keycmp nilfs2: fix the nilfs_iget() vs. nilfs_new_inode() races ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/cgroup.h26
-rw-r--r--include/linux/compaction.h10
-rw-r--r--include/linux/file.h1
-rw-r--r--include/linux/gfp.h4
-rw-r--r--include/linux/hugetlb.h3
-rw-r--r--include/linux/hugetlb_cgroup.h1
-rw-r--r--include/linux/kern_levels.h13
-rw-r--r--include/linux/kernel.h1
-rw-r--r--include/linux/memcontrol.h50
-rw-r--r--include/linux/mm_types.h5
-rw-r--r--include/linux/mmzone.h12
-rw-r--r--include/linux/page_cgroup.h105
-rw-r--r--include/linux/page_counter.h51
-rw-r--r--include/linux/percpu-refcount.h47
-rw-r--r--include/linux/printk.h1
-rw-r--r--include/linux/ptrace.h2
-rw-r--r--include/linux/res_counter.h223
-rw-r--r--include/linux/slab.h4
-rw-r--r--include/linux/swap_cgroup.h42
-rw-r--r--include/net/sock.h26
-rw-r--r--include/uapi/linux/sysctl.h1
21 files changed, 211 insertions, 417 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 27b0c9105da5..641e56494a92 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -113,6 +113,19 @@ static inline void css_get(struct cgroup_subsys_state *css)
}
/**
+ * css_get_many - obtain references on the specified css
+ * @css: target css
+ * @n: number of references to get
+ *
+ * The caller must already have a reference.
+ */
+static inline void css_get_many(struct cgroup_subsys_state *css, unsigned int n)
+{
+ if (!(css->flags & CSS_NO_REF))
+ percpu_ref_get_many(&css->refcnt, n);
+}
+
+/**
* css_tryget - try to obtain a reference on the specified css
* @css: target css
*
@@ -159,6 +172,19 @@ static inline void css_put(struct cgroup_subsys_state *css)
percpu_ref_put(&css->refcnt);
}
+/**
+ * css_put_many - put css references
+ * @css: target css
+ * @n: number of references to put
+ *
+ * Put references obtained via css_get() and css_tryget_online().
+ */
+static inline void css_put_many(struct cgroup_subsys_state *css, unsigned int n)
+{
+ if (!(css->flags & CSS_NO_REF))
+ percpu_ref_put_many(&css->refcnt, n);
+}
+
/* bits in struct cgroup flags field */
enum {
/* Control Group requires release notifications to userspace */
diff --git a/include/linux/compaction.h b/include/linux/compaction.h
index 60bdf8dc02a3..3238ffa33f68 100644
--- a/include/linux/compaction.h
+++ b/include/linux/compaction.h
@@ -33,10 +33,11 @@ extern int fragmentation_index(struct zone *zone, unsigned int order);
extern unsigned long try_to_compact_pages(struct zonelist *zonelist,
int order, gfp_t gfp_mask, nodemask_t *mask,
enum migrate_mode mode, int *contended,
- struct zone **candidate_zone);
+ int alloc_flags, int classzone_idx);
extern void compact_pgdat(pg_data_t *pgdat, int order);
extern void reset_isolation_suitable(pg_data_t *pgdat);
-extern unsigned long compaction_suitable(struct zone *zone, int order);
+extern unsigned long compaction_suitable(struct zone *zone, int order,
+ int alloc_flags, int classzone_idx);
/* Do not skip compaction more than 64 times */
#define COMPACT_MAX_DEFER_SHIFT 6
@@ -103,7 +104,7 @@ static inline bool compaction_restarting(struct zone *zone, int order)
static inline unsigned long try_to_compact_pages(struct zonelist *zonelist,
int order, gfp_t gfp_mask, nodemask_t *nodemask,
enum migrate_mode mode, int *contended,
- struct zone **candidate_zone)
+ int alloc_flags, int classzone_idx)
{
return COMPACT_CONTINUE;
}
@@ -116,7 +117,8 @@ static inline void reset_isolation_suitable(pg_data_t *pgdat)
{
}
-static inline unsigned long compaction_suitable(struct zone *zone, int order)
+static inline unsigned long compaction_suitable(struct zone *zone, int order,
+ int alloc_flags, int classzone_idx)
{
return COMPACT_SKIPPED;
}
diff --git a/include/linux/file.h b/include/linux/file.h
index 4d69123377a2..f87d30882a24 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -66,7 +66,6 @@ extern void set_close_on_exec(unsigned int fd, int flag);
extern bool get_close_on_exec(unsigned int fd);
extern void put_filp(struct file *);
extern int get_unused_fd_flags(unsigned flags);
-#define get_unused_fd() get_unused_fd_flags(0)
extern void put_unused_fd(unsigned int fd);
extern void fd_install(unsigned int fd, struct file *file);
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 41b30fd4d041..07d2699cdb51 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -381,8 +381,8 @@ extern void free_kmem_pages(unsigned long addr, unsigned int order);
void page_alloc_init(void);
void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp);
-void drain_all_pages(void);
-void drain_local_pages(void *dummy);
+void drain_all_pages(struct zone *zone);
+void drain_local_pages(struct zone *zone);
/*
* gfp_allowed_mask is set to GFP_BOOT_MASK during early boot to restrict what
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 6e6d338641fe..cdd149ca5cc0 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -311,7 +311,8 @@ static inline struct hstate *hstate_sizelog(int page_size_log)
{
if (!page_size_log)
return &default_hstate;
- return size_to_hstate(1 << page_size_log);
+
+ return size_to_hstate(1UL << page_size_log);
}
static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
diff --git a/include/linux/hugetlb_cgroup.h b/include/linux/hugetlb_cgroup.h
index 0129f89cf98d..bcc853eccc85 100644
--- a/include/linux/hugetlb_cgroup.h
+++ b/include/linux/hugetlb_cgroup.h
@@ -16,7 +16,6 @@
#define _LINUX_HUGETLB_CGROUP_H
#include <linux/mmdebug.h>
-#include <linux/res_counter.h>
struct hugetlb_cgroup;
/*
diff --git a/include/linux/kern_levels.h b/include/linux/kern_levels.h
index 866caaa9e2bb..c2ce155d83cc 100644
--- a/include/linux/kern_levels.h
+++ b/include/linux/kern_levels.h
@@ -22,4 +22,17 @@
*/
#define KERN_CONT ""
+/* integer equivalents of KERN_<LEVEL> */
+#define LOGLEVEL_SCHED -2 /* Deferred messages from sched code
+ * are set to this special level */
+#define LOGLEVEL_DEFAULT -1 /* default (or last) loglevel */
+#define LOGLEVEL_EMERG 0 /* system is unusable */
+#define LOGLEVEL_ALERT 1 /* action must be taken immediately */
+#define LOGLEVEL_CRIT 2 /* critical conditions */
+#define LOGLEVEL_ERR 3 /* error conditions */
+#define LOGLEVEL_WARNING 4 /* warning conditions */
+#define LOGLEVEL_NOTICE 5 /* normal but significant condition */
+#define LOGLEVEL_INFO 6 /* informational */
+#define LOGLEVEL_DEBUG 7 /* debug-level messages */
+
#endif
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 446d76a87ba1..233ea8107038 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -427,6 +427,7 @@ extern int panic_timeout;
extern int panic_on_oops;
extern int panic_on_unrecovered_nmi;
extern int panic_on_io_nmi;
+extern int panic_on_warn;
extern int sysctl_panic_on_stackoverflow;
/*
* Only to be used by arch init code. If the user over-wrote the default
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 6b75640ef5ab..6ea9f919e888 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -25,7 +25,6 @@
#include <linux/jump_label.h>
struct mem_cgroup;
-struct page_cgroup;
struct page;
struct mm_struct;
struct kmem_cache;
@@ -68,10 +67,9 @@ void mem_cgroup_migrate(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 __mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,
- struct mem_cgroup *memcg);
-bool task_in_mem_cgroup(struct task_struct *task,
- const struct mem_cgroup *memcg);
+bool mem_cgroup_is_descendant(struct mem_cgroup *memcg,
+ struct mem_cgroup *root);
+bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg);
extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
@@ -79,15 +77,16 @@ extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
extern struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css);
-static inline
-bool mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *memcg)
+static inline bool mm_match_cgroup(struct mm_struct *mm,
+ struct mem_cgroup *memcg)
{
struct mem_cgroup *task_memcg;
- bool match;
+ bool match = false;
rcu_read_lock();
task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
- match = __mem_cgroup_same_or_subtree(memcg, task_memcg);
+ if (task_memcg)
+ match = mem_cgroup_is_descendant(task_memcg, memcg);
rcu_read_unlock();
return match;
}
@@ -141,8 +140,8 @@ static inline bool mem_cgroup_disabled(void)
struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page, bool *locked,
unsigned long *flags);
-void mem_cgroup_end_page_stat(struct mem_cgroup *memcg, bool locked,
- unsigned long flags);
+void mem_cgroup_end_page_stat(struct mem_cgroup *memcg, bool *locked,
+ unsigned long *flags);
void mem_cgroup_update_page_stat(struct mem_cgroup *memcg,
enum mem_cgroup_stat_index idx, int val);
@@ -174,10 +173,6 @@ static inline void mem_cgroup_count_vm_event(struct mm_struct *mm,
void mem_cgroup_split_huge_fixup(struct page *head);
#endif
-#ifdef CONFIG_DEBUG_VM
-bool mem_cgroup_bad_page_check(struct page *page);
-void mem_cgroup_print_bad_page(struct page *page);
-#endif
#else /* CONFIG_MEMCG */
struct mem_cgroup;
@@ -297,7 +292,7 @@ static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page,
}
static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg,
- bool locked, unsigned long flags)
+ bool *locked, unsigned long *flags)
{
}
@@ -347,19 +342,6 @@ void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
}
#endif /* CONFIG_MEMCG */
-#if !defined(CONFIG_MEMCG) || !defined(CONFIG_DEBUG_VM)
-static inline bool
-mem_cgroup_bad_page_check(struct page *page)
-{
- return false;
-}
-
-static inline void
-mem_cgroup_print_bad_page(struct page *page)
-{
-}
-#endif
-
enum {
UNDER_LIMIT,
SOFT_LIMIT,
@@ -447,9 +429,8 @@ memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order)
/*
* __GFP_NOFAIL allocations will move on even if charging is not
* possible. Therefore we don't even try, and have this allocation
- * unaccounted. We could in theory charge it with
- * res_counter_charge_nofail, but we hope those allocations are rare,
- * and won't be worth the trouble.
+ * unaccounted. We could in theory charge it forcibly, but we hope
+ * those allocations are rare, and won't be worth the trouble.
*/
if (gfp & __GFP_NOFAIL)
return true;
@@ -467,8 +448,6 @@ memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order)
* memcg_kmem_uncharge_pages: uncharge pages from memcg
* @page: pointer to struct page being freed
* @order: allocation order.
- *
- * there is no need to specify memcg here, since it is embedded in page_cgroup
*/
static inline void
memcg_kmem_uncharge_pages(struct page *page, int order)
@@ -485,8 +464,7 @@ memcg_kmem_uncharge_pages(struct page *page, int order)
*
* Needs to be called after memcg_kmem_newpage_charge, regardless of success or
* failure of the allocation. if @page is NULL, this function will revert the
- * charges. Otherwise, it will commit the memcg given by @memcg to the
- * corresponding page_cgroup.
+ * charges. Otherwise, it will commit @page to @memcg.
*/
static inline void
memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order)
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 004e9d17b47e..bf9f57529dcf 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -22,6 +22,7 @@
#define AT_VECTOR_SIZE (2*(AT_VECTOR_SIZE_ARCH + AT_VECTOR_SIZE_BASE + 1))
struct address_space;
+struct mem_cgroup;
#define USE_SPLIT_PTE_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS)
#define USE_SPLIT_PMD_PTLOCKS (USE_SPLIT_PTE_PTLOCKS && \
@@ -167,6 +168,10 @@ struct page {
struct page *first_page; /* Compound tail pages */
};
+#ifdef CONFIG_MEMCG
+ struct mem_cgroup *mem_cgroup;
+#endif
+
/*
* On machines where all RAM is mapped into kernel address space,
* we can simply calculate the virtual address. On machines with
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index ffe66e381c04..3879d7664dfc 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -722,9 +722,6 @@ typedef struct pglist_data {
int nr_zones;
#ifdef CONFIG_FLAT_NODE_MEM_MAP /* means !SPARSEMEM */
struct page *node_mem_map;
-#ifdef CONFIG_MEMCG
- struct page_cgroup *node_page_cgroup;
-#endif
#endif
#ifndef CONFIG_NO_BOOTMEM
struct bootmem_data *bdata;
@@ -1078,7 +1075,6 @@ static inline unsigned long early_pfn_to_nid(unsigned long pfn)
#define SECTION_ALIGN_DOWN(pfn) ((pfn) & PAGE_SECTION_MASK)
struct page;
-struct page_cgroup;
struct mem_section {
/*
* This is, logically, a pointer to an array of struct
@@ -1096,14 +1092,6 @@ struct mem_section {
/* See declaration of similar field in struct zone */
unsigned long *pageblock_flags;
-#ifdef CONFIG_MEMCG
- /*
- * If !SPARSEMEM, pgdat doesn't have page_cgroup pointer. We use
- * section. (see memcontrol.h/page_cgroup.h about this.)
- */
- struct page_cgroup *page_cgroup;
- unsigned long pad;
-#endif
/*
* WARNING: mem_section must be a power-of-2 in size for the
* calculation and use of SECTION_ROOT_MASK to make sense.
diff --git a/include/linux/page_cgroup.h b/include/linux/page_cgroup.h
deleted file mode 100644
index 5c831f1eca79..000000000000
--- a/include/linux/page_cgroup.h
+++ /dev/null
@@ -1,105 +0,0 @@
-#ifndef __LINUX_PAGE_CGROUP_H
-#define __LINUX_PAGE_CGROUP_H
-
-enum {
- /* flags for mem_cgroup */
- PCG_USED = 0x01, /* This page is charged to a memcg */
- PCG_MEM = 0x02, /* This page holds a memory charge */
- PCG_MEMSW = 0x04, /* This page holds a memory+swap charge */
-};
-
-struct pglist_data;
-
-#ifdef CONFIG_MEMCG
-struct mem_cgroup;
-
-/*
- * Page Cgroup can be considered as an extended mem_map.
- * A page_cgroup page is associated with every page descriptor. The
- * page_cgroup helps us identify information about the cgroup
- * All page cgroups are allocated at boot or memory hotplug event,
- * then the page cgroup for pfn always exists.
- */
-struct page_cgroup {
- unsigned long flags;
- struct mem_cgroup *mem_cgroup;
-};
-
-extern void pgdat_page_cgroup_init(struct pglist_data *pgdat);
-
-#ifdef CONFIG_SPARSEMEM
-static inline void page_cgroup_init_flatmem(void)
-{
-}
-extern void page_cgroup_init(void);
-#else
-extern void page_cgroup_init_flatmem(void);
-static inline void page_cgroup_init(void)
-{
-}
-#endif
-
-struct page_cgroup *lookup_page_cgroup(struct page *page);
-
-static inline int PageCgroupUsed(struct page_cgroup *pc)
-{
- return !!(pc->flags & PCG_USED);
-}
-#else /* !CONFIG_MEMCG */
-struct page_cgroup;
-
-static inline void pgdat_page_cgroup_init(struct pglist_data *pgdat)
-{
-}
-
-static inline struct page_cgroup *lookup_page_cgroup(struct page *page)
-{
- return NULL;
-}
-
-static inline void page_cgroup_init(void)
-{
-}
-
-static inline void page_cgroup_init_flatmem(void)
-{
-}
-#endif /* CONFIG_MEMCG */
-
-#include <linux/swap.h>
-
-#ifdef CONFIG_MEMCG_SWAP
-extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent,
- unsigned short old, unsigned short new);
-extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id);
-extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent);
-extern int swap_cgroup_swapon(int type, unsigned long max_pages);
-extern void swap_cgroup_swapoff(int type);
-#else
-
-static inline
-unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id)
-{
- return 0;
-}
-
-static inline
-unsigned short lookup_swap_cgroup_id(swp_entry_t ent)
-{
- return 0;
-}
-
-static inline int
-swap_cgroup_swapon(int type, unsigned long max_pages)
-{
- return 0;
-}
-
-static inline void swap_cgroup_swapoff(int type)
-{
- return;
-}
-
-#endif /* CONFIG_MEMCG_SWAP */
-
-#endif /* __LINUX_PAGE_CGROUP_H */
diff --git a/include/linux/page_counter.h b/include/linux/page_counter.h
new file mode 100644
index 000000000000..955421575d16
--- /dev/null
+++ b/include/linux/page_counter.h
@@ -0,0 +1,51 @@
+#ifndef _LINUX_PAGE_COUNTER_H
+#define _LINUX_PAGE_COUNTER_H
+
+#include <linux/atomic.h>
+#include <linux/kernel.h>
+#include <asm/page.h>
+
+struct page_counter {
+ atomic_long_t count;
+ unsigned long limit;
+ struct page_counter *parent;
+
+ /* legacy */
+ unsigned long watermark;
+ unsigned long failcnt;
+};
+
+#if BITS_PER_LONG == 32
+#define PAGE_COUNTER_MAX LONG_MAX
+#else
+#define PAGE_COUNTER_MAX (LONG_MAX / PAGE_SIZE)
+#endif
+
+static inline void page_counter_init(struct page_counter *counter,
+ struct page_counter *parent)
+{
+ atomic_long_set(&counter->count, 0);
+ counter->limit = PAGE_COUNTER_MAX;
+ counter->parent = parent;
+}
+
+static inline unsigned long page_counter_read(struct page_counter *counter)
+{
+ return atomic_long_read(&counter->count);
+}
+
+void page_counter_cancel(struct page_counter *counter, unsigned long nr_pages);
+void page_counter_charge(struct page_counter *counter, unsigned long nr_pages);
+int page_counter_try_charge(struct page_counter *counter,
+ unsigned long nr_pages,
+ struct page_counter **fail);
+void page_counter_uncharge(struct page_counter *counter, unsigned long nr_pages);
+int page_counter_limit(struct page_counter *counter, unsigned long limit);
+int page_counter_memparse(const char *buf, unsigned long *nr_pages);
+
+static inline void page_counter_reset_watermark(struct page_counter *counter)
+{
+ counter->watermark = page_counter_read(counter);
+}
+
+#endif /* _LINUX_PAGE_COUNTER_H */
diff --git a/include/linux/percpu-refcount.h b/include/linux/percpu-refcount.h
index 51ce60c35f4c..530b249f7ea4 100644
--- a/include/linux/percpu-refcount.h
+++ b/include/linux/percpu-refcount.h
@@ -147,28 +147,42 @@ static inline bool __ref_is_percpu(struct percpu_ref *ref,
}
/**
- * percpu_ref_get - increment a percpu refcount
+ * percpu_ref_get_many - increment a percpu refcount
* @ref: percpu_ref to get
+ * @nr: number of references to get
*
- * Analagous to atomic_long_inc().
+ * Analogous to atomic_long_add().
*
* This function is safe to call as long as @ref is between init and exit.
*/
-static inline void percpu_ref_get(struct percpu_ref *ref)
+static inline void percpu_ref_get_many(struct percpu_ref *ref, unsigned long nr)
{
unsigned long __percpu *percpu_count;
rcu_read_lock_sched();
if (__ref_is_percpu(ref, &percpu_count))
- this_cpu_inc(*percpu_count);
+ this_cpu_add(*percpu_count, nr);
else
- atomic_long_inc(&ref->count);
+ atomic_long_add(nr, &ref->count);
rcu_read_unlock_sched();
}
/**
+ * percpu_ref_get - increment a percpu refcount
+ * @ref: percpu_ref to get
+ *
+ * Analagous to atomic_long_inc().
+ *
+ * This function is safe to call as long as @ref is between init and exit.
+ */
+static inline void percpu_ref_get(struct percpu_ref *ref)
+{
+ percpu_ref_get_many(ref, 1);
+}
+
+/**
* percpu_ref_tryget - try to increment a percpu refcount
* @ref: percpu_ref to try-get
*
@@ -231,29 +245,44 @@ static inline bool percpu_ref_tryget_live(struct percpu_ref *ref)
}
/**
- * percpu_ref_put - decrement a percpu refcount
+ * percpu_ref_put_many - decrement a percpu refcount
* @ref: percpu_ref to put
+ * @nr: number of references to put
*
* Decrement the refcount, and if 0, call the release function (which was passed
* to percpu_ref_init())
*
* This function is safe to call as long as @ref is between init and exit.
*/
-static inline void percpu_ref_put(struct percpu_ref *ref)
+static inline void percpu_ref_put_many(struct percpu_ref *ref, unsigned long nr)
{
unsigned long __percpu *percpu_count;
rcu_read_lock_sched();
if (__ref_is_percpu(ref, &percpu_count))
- this_cpu_dec(*percpu_count);
- else if (unlikely(atomic_long_dec_and_test(&ref->count)))
+ this_cpu_sub(*percpu_count, nr);
+ else if (unlikely(atomic_long_sub_and_test(nr, &ref->count)))
ref->release(ref);
rcu_read_unlock_sched();
}
/**
+ * percpu_ref_put - decrement a percpu refcount
+ * @ref: percpu_ref to put
+ *
+ * Decrement the refcount, and if 0, call the release function (which was passed
+ * to percpu_ref_init())
+ *
+ * This function is safe to call as long as @ref is between init and exit.
+ */
+static inline void percpu_ref_put(struct percpu_ref *ref)
+{
+ percpu_ref_put_many(ref, 1);
+}
+
+/**
* percpu_ref_is_zero - test whether a percpu refcount reached zero
* @ref: percpu_ref to test
*
diff --git a/include/linux/printk.h b/include/linux/printk.h
index d78125f73ac4..3dd489f2dedc 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -118,7 +118,6 @@ int no_printk(const char *fmt, ...)
#ifdef CONFIG_EARLY_PRINTK
extern asmlinkage __printf(1, 2)
void early_printk(const char *fmt, ...);
-void early_vprintk(const char *fmt, va_list ap);
#else
static inline __printf(1, 2) __cold
void early_printk(const char *s, ...) { }
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index cc79eff4a1ad..987a73a40ef8 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -52,7 +52,7 @@ extern void ptrace_notify(int exit_code);
extern void __ptrace_link(struct task_struct *child,
struct task_struct *new_parent);
extern void __ptrace_unlink(struct task_struct *child);
-extern void exit_ptrace(struct task_struct *tracer);
+extern void exit_ptrace(struct task_struct *tracer, struct list_head *dead);
#define PTRACE_MODE_READ 0x01
#define PTRACE_MODE_ATTACH 0x02
#define PTRACE_MODE_NOAUDIT 0x04
diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h
deleted file mode 100644
index 56b7bc32db4f..000000000000
--- a/include/linux/res_counter.h
+++ /dev/null
@@ -1,223 +0,0 @@
-#ifndef __RES_COUNTER_H__
-#define __RES_COUNTER_H__
-
-/*
- * Resource Counters
- * Contain common data types and routines for resource accounting
- *
- * Copyright 2007 OpenVZ SWsoft Inc
- *
- * Author: Pavel Emelianov <xemul@openvz.org>
- *
- * See Documentation/cgroups/resource_counter.txt for more
- * info about what this counter is.
- */
-
-#include <linux/spinlock.h>
-#include <linux/errno.h>
-
-/*
- * The core object. the cgroup that wishes to account for some
- * resource may include this counter into its structures and use
- * the helpers described beyond
- */
-
-struct res_counter {
- /*
- * the current resource consumption level
- */
- unsigned long long usage;
- /*
- * the maximal value of the usage from the counter creation
- */
- unsigned long long max_usage;
- /*
- * the limit that usage cannot exceed
- */
- unsigned long long limit;
- /*
- * the limit that usage can be exceed
- */
- unsigned long long soft_limit;
- /*
- * the number of unsuccessful attempts to consume the resource
- */
- unsigned long long failcnt;
- /*
- * the lock to protect all of the above.
- * the routines below consider this to be IRQ-safe
- */
- spinlock_t lock;
- /*
- * Parent counter, used for hierarchial resource accounting
- */
- struct res_counter *parent;
-};
-
-#define RES_COUNTER_MAX ULLONG_MAX
-
-/**
- * Helpers to interact with userspace
- * res_counter_read_u64() - returns the value of the specified member.
- * res_counter_read/_write - put/get the specified fields from the
- * res_counter struct to/from the user
- *
- * @counter: the counter in question
- * @member: the field to work with (see RES_xxx below)
- * @buf: the buffer to opeate on,...
- * @nbytes: its size...
- * @pos: and the offset.
- */
-
-u64 res_counter_read_u64(struct res_counter *counter, int member);
-
-ssize_t res_counter_read(struct res_counter *counter, int member,
- const char __user *buf, size_t nbytes, loff_t *pos,
- int (*read_strategy)(unsigned long long val, char *s));
-
-int res_counter_memparse_write_strategy(const char *buf,
- unsigned long long *res);
-
-/*
- * the field descriptors. one for each member of res_counter
- */
-
-enum {
- RES_USAGE,
- RES_MAX_USAGE,
- RES_LIMIT,
- RES_FAILCNT,
- RES_SOFT_LIMIT,
-};
-
-/*
- * helpers for accounting
- */
-
-void res_counter_init(struct res_counter *counter, struct res_counter *parent);
-
-/*
- * charge - try to consume more resource.
- *
- * @counter: the counter
- * @val: the amount of the resource. each controller defines its own
- * units, e.g. numbers, bytes, Kbytes, etc
- *
- * returns 0 on success and <0 if the counter->usage will exceed the
- * counter->limit
- *
- * charge_nofail works the same, except that it charges the resource
- * counter unconditionally, and returns < 0 if the after the current
- * charge we are over limit.
- */
-
-int __must_check res_counter_charge(struct res_counter *counter,
- unsigned long val, struct res_counter **limit_fail_at);
-int res_counter_charge_nofail(struct res_counter *counter,
- unsigned long val, struct res_counter **limit_fail_at);
-
-/*
- * uncharge - tell that some portion of the resource is released
- *
- * @counter: the counter
- * @val: the amount of the resource
- *
- * these calls check for usage underflow and show a warning on the console
- *
- * returns the total charges still present in @counter.
- */
-
-u64 res_counter_uncharge(struct res_counter *counter, unsigned long val);
-
-u64 res_counter_uncharge_until(struct res_counter *counter,
- struct res_counter *top,
- unsigned long val);
-/**
- * res_counter_margin - calculate chargeable space of a counter
- * @cnt: the counter
- *
- * Returns the difference between the hard limit and the current usage
- * of resource counter @cnt.
- */
-static inline unsigned long long res_counter_margin(struct res_counter *cnt)
-{
- unsigned long long margin;
- unsigned long flags;
-
- spin_lock_irqsave(&cnt->lock, flags);
- if (cnt->limit > cnt->usage)
- margin = cnt->limit - cnt->usage;
- else
- margin = 0;
- spin_unlock_irqrestore(&cnt->lock, flags);
- return margin;
-}
-
-/**
- * Get the difference between the usage and the soft limit
- * @cnt: The counter
- *
- * Returns 0 if usage is less than or equal to soft limit
- * The difference between usage and soft limit, otherwise.
- */
-static inline unsigned long long
-res_counter_soft_limit_excess(struct res_counter *cnt)
-{
- unsigned long long excess;
- unsigned long flags;
-
- spin_lock_irqsave(&cnt->lock, flags);
- if (cnt->usage <= cnt->soft_limit)
- excess = 0;
- else
- excess = cnt->usage - cnt->soft_limit;
- spin_unlock_irqrestore(&cnt->lock, flags);
- return excess;
-}
-
-static inline void res_counter_reset_max(struct res_counter *cnt)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&cnt->lock, flags);
- cnt->max_usage = cnt->usage;
- spin_unlock_irqrestore(&cnt->lock, flags);
-}
-
-static inline void res_counter_reset_failcnt(struct res_counter *cnt)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&cnt->lock, flags);
- cnt->failcnt = 0;
- spin_unlock_irqrestore(&cnt->lock, flags);
-}
-
-static inline int res_counter_set_limit(struct res_counter *cnt,
- unsigned long long limit)
-{
- unsigned long flags;
- int ret = -EBUSY;
-
- spin_lock_irqsave(&cnt->lock, flags);
- if (cnt->usage <= limit) {
- cnt->limit = limit;
- ret = 0;
- }
- spin_unlock_irqrestore(&cnt->lock, flags);
- return ret;
-}
-
-static inline int
-res_counter_set_soft_limit(struct res_counter *cnt,
- unsigned long long soft_limit)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&cnt->lock, flags);
- cnt->soft_limit = soft_limit;
- spin_unlock_irqrestore(&cnt->lock, flags);
- return 0;
-}
-
-#endif
diff --git a/include/linux/slab.h b/include/linux/slab.h
index c265bec6a57d..8a2457d42fc8 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -513,10 +513,6 @@ struct memcg_cache_params {
int memcg_update_all_caches(int num_memcgs);
-struct seq_file;
-int cache_show(struct kmem_cache *s, struct seq_file *m);
-void print_slabinfo_header(struct seq_file *m);
-
/**
* kmalloc_array - allocate memory for an array.
* @n: number of elements.
diff --git a/include/linux/swap_cgroup.h b/include/linux/swap_cgroup.h
new file mode 100644
index 000000000000..145306bdc92f
--- /dev/null
+++ b/include/linux/swap_cgroup.h
@@ -0,0 +1,42 @@
+#ifndef __LINUX_SWAP_CGROUP_H
+#define __LINUX_SWAP_CGROUP_H
+
+#include <linux/swap.h>
+
+#ifdef CONFIG_MEMCG_SWAP
+
+extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent,
+ unsigned short old, unsigned short new);
+extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id);
+extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent);
+extern int swap_cgroup_swapon(int type, unsigned long max_pages);
+extern void swap_cgroup_swapoff(int type);
+
+#else
+
+static inline
+unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id)
+{
+ return 0;
+}
+
+static inline
+unsigned short lookup_swap_cgroup_id(swp_entry_t ent)
+{
+ return 0;
+}
+
+static inline int
+swap_cgroup_swapon(int type, unsigned long max_pages)
+{
+ return 0;
+}
+
+static inline void swap_cgroup_swapoff(int type)
+{
+ return;
+}
+
+#endif /* CONFIG_MEMCG_SWAP */
+
+#endif /* __LINUX_SWAP_CGROUP_H */
diff --git a/include/net/sock.h b/include/net/sock.h
index e6f235ebf6c9..7ff44e062a38 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -54,8 +54,8 @@
#include <linux/security.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
+#include <linux/page_counter.h>
#include <linux/memcontrol.h>
-#include <linux/res_counter.h>
#include <linux/static_key.h>
#include <linux/aio.h>
#include <linux/sched.h>
@@ -1062,7 +1062,7 @@ enum cg_proto_flags {
};
struct cg_proto {
- struct res_counter memory_allocated; /* Current allocated memory. */
+ struct page_counter memory_allocated; /* Current allocated memory. */
struct percpu_counter sockets_allocated; /* Current number of sockets. */
int memory_pressure;
long sysctl_mem[3];
@@ -1214,34 +1214,26 @@ static inline void memcg_memory_allocated_add(struct cg_proto *prot,
unsigned long amt,
int *parent_status)
{
- struct res_counter *fail;
- int ret;
+ page_counter_charge(&prot->memory_allocated, amt);
- ret = res_counter_charge_nofail(&prot->memory_allocated,
- amt << PAGE_SHIFT, &fail);
- if (ret < 0)
+ if (page_counter_read(&prot->memory_allocated) >
+ prot->memory_allocated.limit)
*parent_status = OVER_LIMIT;
}
static inline void memcg_memory_allocated_sub(struct cg_proto *prot,
unsigned long amt)
{
- res_counter_uncharge(&prot->memory_allocated, amt << PAGE_SHIFT);
-}
-
-static inline u64 memcg_memory_allocated_read(struct cg_proto *prot)
-{
- u64 ret;
- ret = res_counter_read_u64(&prot->memory_allocated, RES_USAGE);
- return ret >> PAGE_SHIFT;
+ page_counter_uncharge(&prot->memory_allocated, amt);
}
static inline long
sk_memory_allocated(const struct sock *sk)
{
struct proto *prot = sk->sk_prot;
+
if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
- return memcg_memory_allocated_read(sk->sk_cgrp);
+ return page_counter_read(&sk->sk_cgrp->memory_allocated);
return atomic_long_read(prot->memory_allocated);
}
@@ -1255,7 +1247,7 @@ sk_memory_allocated_add(struct sock *sk, int amt, int *parent_status)
memcg_memory_allocated_add(sk->sk_cgrp, amt, parent_status);
/* update the root cgroup regardless */
atomic_long_add_return(amt, prot->memory_allocated);
- return memcg_memory_allocated_read(sk->sk_cgrp);
+ return page_counter_read(&sk->sk_cgrp->memory_allocated);
}
return atomic_long_add_return(amt, prot->memory_allocated);
diff --git a/include/uapi/linux/sysctl.h b/include/uapi/linux/sysctl.h
index 43aaba1cc037..0956373b56db 100644
--- a/include/uapi/linux/sysctl.h
+++ b/include/uapi/linux/sysctl.h
@@ -153,6 +153,7 @@ enum
KERN_MAX_LOCK_DEPTH=74, /* int: rtmutex's maximum lock depth */
KERN_NMI_WATCHDOG=75, /* int: enable/disable nmi watchdog */
KERN_PANIC_ON_NMI=76, /* int: whether we will panic on an unrecovered */
+ KERN_PANIC_ON_WARN=77, /* int: call panic() in WARN() functions */
};