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-rw-r--r--kernel/Makefile1
-rw-r--r--kernel/cpu_acct.c186
-rw-r--r--kernel/sched.c14
3 files changed, 3 insertions, 198 deletions
diff --git a/kernel/Makefile b/kernel/Makefile
index f60afe742599..dfa96956dae0 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -40,7 +40,6 @@ obj-$(CONFIG_COMPAT) += compat.o
obj-$(CONFIG_CGROUPS) += cgroup.o
obj-$(CONFIG_CGROUP_DEBUG) += cgroup_debug.o
obj-$(CONFIG_CPUSETS) += cpuset.o
-obj-$(CONFIG_CGROUP_CPUACCT) += cpu_acct.o
obj-$(CONFIG_CGROUP_NS) += ns_cgroup.o
obj-$(CONFIG_IKCONFIG) += configs.o
obj-$(CONFIG_STOP_MACHINE) += stop_machine.o
diff --git a/kernel/cpu_acct.c b/kernel/cpu_acct.c
deleted file mode 100644
index 731e47e7f164..000000000000
--- a/kernel/cpu_acct.c
+++ /dev/null
@@ -1,186 +0,0 @@
-/*
- * kernel/cpu_acct.c - CPU accounting cgroup subsystem
- *
- * Copyright (C) Google Inc, 2006
- *
- * Developed by Paul Menage (menage@google.com) and Balbir Singh
- * (balbir@in.ibm.com)
- *
- */
-
-/*
- * Example cgroup subsystem for reporting total CPU usage of tasks in a
- * cgroup, along with percentage load over a time interval
- */
-
-#include <linux/module.h>
-#include <linux/cgroup.h>
-#include <linux/fs.h>
-#include <linux/rcupdate.h>
-
-#include <asm/div64.h>
-
-struct cpuacct {
- struct cgroup_subsys_state css;
- spinlock_t lock;
- /* total time used by this class */
- cputime64_t time;
-
- /* time when next load calculation occurs */
- u64 next_interval_check;
-
- /* time used in current period */
- cputime64_t current_interval_time;
-
- /* time used in last period */
- cputime64_t last_interval_time;
-};
-
-struct cgroup_subsys cpuacct_subsys;
-
-static inline struct cpuacct *cgroup_ca(struct cgroup *cont)
-{
- return container_of(cgroup_subsys_state(cont, cpuacct_subsys_id),
- struct cpuacct, css);
-}
-
-static inline struct cpuacct *task_ca(struct task_struct *task)
-{
- return container_of(task_subsys_state(task, cpuacct_subsys_id),
- struct cpuacct, css);
-}
-
-#define INTERVAL (HZ * 10)
-
-static inline u64 next_interval_boundary(u64 now)
-{
- /* calculate the next interval boundary beyond the
- * current time */
- do_div(now, INTERVAL);
- return (now + 1) * INTERVAL;
-}
-
-static struct cgroup_subsys_state *cpuacct_create(
- struct cgroup_subsys *ss, struct cgroup *cont)
-{
- struct cpuacct *ca = kzalloc(sizeof(*ca), GFP_KERNEL);
-
- if (!ca)
- return ERR_PTR(-ENOMEM);
- spin_lock_init(&ca->lock);
- ca->next_interval_check = next_interval_boundary(get_jiffies_64());
- return &ca->css;
-}
-
-static void cpuacct_destroy(struct cgroup_subsys *ss,
- struct cgroup *cont)
-{
- kfree(cgroup_ca(cont));
-}
-
-/* Lazily update the load calculation if necessary. Called with ca locked */
-static void cpuusage_update(struct cpuacct *ca)
-{
- u64 now = get_jiffies_64();
-
- /* If we're not due for an update, return */
- if (ca->next_interval_check > now)
- return;
-
- if (ca->next_interval_check <= (now - INTERVAL)) {
- /* If it's been more than an interval since the last
- * check, then catch up - the last interval must have
- * been zero load */
- ca->last_interval_time = 0;
- ca->next_interval_check = next_interval_boundary(now);
- } else {
- /* If a steal takes the last interval time negative,
- * then we just ignore it */
- if ((s64)ca->current_interval_time > 0)
- ca->last_interval_time = ca->current_interval_time;
- else
- ca->last_interval_time = 0;
- ca->next_interval_check += INTERVAL;
- }
- ca->current_interval_time = 0;
-}
-
-static u64 cpuusage_read(struct cgroup *cont, struct cftype *cft)
-{
- struct cpuacct *ca = cgroup_ca(cont);
- u64 time;
-
- spin_lock_irq(&ca->lock);
- cpuusage_update(ca);
- time = cputime64_to_jiffies64(ca->time);
- spin_unlock_irq(&ca->lock);
-
- /* Convert 64-bit jiffies to seconds */
- time *= 1000;
- do_div(time, HZ);
- return time;
-}
-
-static u64 load_read(struct cgroup *cont, struct cftype *cft)
-{
- struct cpuacct *ca = cgroup_ca(cont);
- u64 time;
-
- /* Find the time used in the previous interval */
- spin_lock_irq(&ca->lock);
- cpuusage_update(ca);
- time = cputime64_to_jiffies64(ca->last_interval_time);
- spin_unlock_irq(&ca->lock);
-
- /* Convert time to a percentage, to give the load in the
- * previous period */
- time *= 100;
- do_div(time, INTERVAL);
-
- return time;
-}
-
-static struct cftype files[] = {
- {
- .name = "usage",
- .read_uint = cpuusage_read,
- },
- {
- .name = "load",
- .read_uint = load_read,
- }
-};
-
-static int cpuacct_populate(struct cgroup_subsys *ss, struct cgroup *cont)
-{
- return cgroup_add_files(cont, ss, files, ARRAY_SIZE(files));
-}
-
-void cpuacct_charge(struct task_struct *task, cputime_t cputime)
-{
-
- struct cpuacct *ca;
- unsigned long flags;
-
- if (!cpuacct_subsys.active)
- return;
- rcu_read_lock();
- ca = task_ca(task);
- if (ca) {
- spin_lock_irqsave(&ca->lock, flags);
- cpuusage_update(ca);
- ca->time = cputime64_add(ca->time, cputime);
- ca->current_interval_time =
- cputime64_add(ca->current_interval_time, cputime);
- spin_unlock_irqrestore(&ca->lock, flags);
- }
- rcu_read_unlock();
-}
-
-struct cgroup_subsys cpuacct_subsys = {
- .name = "cpuacct",
- .create = cpuacct_create,
- .destroy = cpuacct_destroy,
- .populate = cpuacct_populate,
- .subsys_id = cpuacct_subsys_id,
-};
diff --git a/kernel/sched.c b/kernel/sched.c
index b18f231a4875..4fb3532dd7e8 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -52,7 +52,6 @@
#include <linux/cpu.h>
#include <linux/cpuset.h>
#include <linux/percpu.h>
-#include <linux/cpu_acct.h>
#include <linux/kthread.h>
#include <linux/seq_file.h>
#include <linux/sysctl.h>
@@ -3338,13 +3337,9 @@ void account_user_time(struct task_struct *p, cputime_t cputime)
{
struct cpu_usage_stat *cpustat = &kstat_this_cpu.cpustat;
cputime64_t tmp;
- struct rq *rq = this_rq();
p->utime = cputime_add(p->utime, cputime);
- if (p != rq->idle)
- cpuacct_charge(p, cputime);
-
/* Add user time to cpustat. */
tmp = cputime_to_cputime64(cputime);
if (TASK_NICE(p) > 0)
@@ -3408,10 +3403,9 @@ void account_system_time(struct task_struct *p, int hardirq_offset,
cpustat->irq = cputime64_add(cpustat->irq, tmp);
else if (softirq_count())
cpustat->softirq = cputime64_add(cpustat->softirq, tmp);
- else if (p != rq->idle) {
+ else if (p != rq->idle)
cpustat->system = cputime64_add(cpustat->system, tmp);
- cpuacct_charge(p, cputime);
- } else if (atomic_read(&rq->nr_iowait) > 0)
+ else if (atomic_read(&rq->nr_iowait) > 0)
cpustat->iowait = cputime64_add(cpustat->iowait, tmp);
else
cpustat->idle = cputime64_add(cpustat->idle, tmp);
@@ -3447,10 +3441,8 @@ void account_steal_time(struct task_struct *p, cputime_t steal)
cpustat->iowait = cputime64_add(cpustat->iowait, tmp);
else
cpustat->idle = cputime64_add(cpustat->idle, tmp);
- } else {
+ } else
cpustat->steal = cputime64_add(cpustat->steal, tmp);
- cpuacct_charge(p, -tmp);
- }
}
/*
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-29 19:27:31 +0000