Merge branches 'timers/clocksource', 'timers/hrtimers', 'timers/nohz', 'timers/ntp...

diff --cc drivers/clocksource/acpi_pm.c
index 3df3384,5ca1d80,71d2ac4,5ca1d80,4eee533,71d2ac4..c201710
--- 1/drivers/clocksource/acpi_pm.c
--- 2/drivers/clocksource/acpi_pm.c
--- 3/drivers/clocksource/acpi_pm.c
--- 4/drivers/clocksource/acpi_pm.c
--- 5/drivers/clocksource/acpi_pm.c
--- 6/drivers/clocksource/acpi_pm.c
+++ b/drivers/clocksource/acpi_pm.c
@@@@@@@ -175,10 -175,10 -176,15 -175,10 -176,13 -176,15 +176,15 @@@@@@@ static int verify_pmtmr_rate(void
      #define verify_pmtmr_rate() (0)
      #endif
      
++ +  /* Number of monotonicity checks to perform during initialization */
++ +  #define ACPI_PM_MONOTONICITY_CHECKS 10
++ ++ /* Number of reads we try to get two different values */
++ ++ #define ACPI_PM_READ_CHECKS 10000
++ +  
      static int __init init_acpi_pm_clocksource(void)
      {
-- -    u32 value1, value2;
-- -    unsigned int i;
++ +    cycle_t value1, value2;
    -   unsigned int i, j, good = 0;
++ ++   unsigned int i, j = 0;
      
        if (!pmtmr_ioport)
                return -ENODEV;
@@@@@@@ -187,24 -187,24 -193,29 -187,24 -191,32 -193,29 +193,29 @@@@@@@
                                                clocksource_acpi_pm.shift);
      
        /* "verify" this timing source: */
-- -    value1 = read_pmtmr();
-- -    for (i = 0; i < 10000; i++) {
-- -            value2 = read_pmtmr();
-- -            if (value2 == value1)
-- -                    continue;
-- -            if (value2 > value1)
-- -                    goto pm_good;
-- -            if ((value2 < value1) && ((value2) < 0xFFF))
-- -                    goto pm_good;
-- -            printk(KERN_INFO "PM-Timer had inconsistent results:"
-- -                    " 0x%#x, 0x%#x - aborting.\n", value1, value2);
-- -            return -EINVAL;
++ +    for (j = 0; j < ACPI_PM_MONOTONICITY_CHECKS; j++) {
++ ++           udelay(100 * j);
++ +            value1 = clocksource_acpi_pm.read();
    -           for (i = 0; i < 10000; i++) {
++ ++           for (i = 0; i < ACPI_PM_READ_CHECKS; i++) {
++ +                    value2 = clocksource_acpi_pm.read();
++ +                    if (value2 == value1)
++ +                            continue;
++ +                    if (value2 > value1)
    -                           good++;
++ +                            break;
++ +                    if ((value2 < value1) && ((value2) < 0xFFF))
    -                           good++;
++ +                            break;
++ +                    printk(KERN_INFO "PM-Timer had inconsistent results:"
++ +                           " 0x%#llx, 0x%#llx - aborting.\n",
++ +                           value1, value2);
++ +                    return -EINVAL;
++ +            }
    -           udelay(300 * i);
    -   }
    - 
    -   if (good != ACPI_PM_MONOTONICITY_CHECKS) {
    -           printk(KERN_INFO "PM-Timer failed consistency check "
    -                  " (0x%#llx) - aborting.\n", value1);
    -           return -ENODEV;
++ ++           if (i == ACPI_PM_READ_CHECKS) {
++ ++                   printk(KERN_INFO "PM-Timer failed consistency check "
++ ++                          " (0x%#llx) - aborting.\n", value1);
++ ++                   return -ENODEV;
++ ++           }
        }
-- -    printk(KERN_INFO "PM-Timer had no reasonable result:"
-- -                    " 0x%#x - aborting.\n", value1);
-- -    return -ENODEV;
      
-- -  pm_good:
        if (verify_pmtmr_rate() != 0)
                return -ENODEV;
      

diff --cc fs/binfmt_elf.c
Simple merge

diff --cc fs/proc/array.c
Simple merge

diff --cc include/linux/hrtimer.h
Simple merge

diff --cc include/linux/sched.h
Simple merge

diff --cc include/linux/time.h
Simple merge

diff --cc kernel/compat.c
Simple merge

diff --cc kernel/exit.c
index 38ec406,38ec406,0ef4673,1639564,40036ac,0ef4673..059b38c
--- 1/kernel/exit.c
--- 2/kernel/exit.c
--- 3/kernel/exit.c
--- 4/kernel/exit.c
--- 5/kernel/exit.c
--- 6/kernel/exit.c
+++ b/kernel/exit.c
@@@@@@@ -112,9 -112,9 -112,9 -112,9 -112,7 -112,9 +112,7 @@@@@@@ static void __exit_signal(struct task_s
                 * We won't ever get here for the group leader, since it
                 * will have been the last reference on the signal_struct.
                 */
--              sig->utime = cputime_add(sig->utime, tsk->utime);
--              sig->stime = cputime_add(sig->stime, tsk->stime);
--              sig->gtime = cputime_add(sig->gtime, tsk->gtime);
  -- -          sig->utime = cputime_add(sig->utime, task_utime(tsk));
  -- -          sig->stime = cputime_add(sig->stime, task_stime(tsk));
++              sig->gtime = cputime_add(sig->gtime, task_gtime(tsk));
                sig->min_flt += tsk->min_flt;
                sig->maj_flt += tsk->maj_flt;
                sig->nvcsw += tsk->nvcsw;

diff --cc kernel/fork.c
index 7ce2ebe,7ce2ebe,30de644,7ce2ebe,021ae01,30de644..44e64d7
--- 1/kernel/fork.c
--- 2/kernel/fork.c
--- 3/kernel/fork.c
--- 4/kernel/fork.c
--- 5/kernel/fork.c
--- 6/kernel/fork.c
+++ b/kernel/fork.c
@@@@@@@ -795,15 -795,15 -795,16 -795,15 -824,10 -795,16 +824,11 @@@@@@@ static int copy_signal(unsigned long cl
        sig->it_real_incr.tv64 = 0;
        sig->real_timer.function = it_real_fn;
      
---- -  sig->it_virt_expires = cputime_zero;
---- -  sig->it_virt_incr = cputime_zero;
---- -  sig->it_prof_expires = cputime_zero;
---- -  sig->it_prof_incr = cputime_zero;
---- -
        sig->leader = 0;        /* session leadership doesn't inherit */
        sig->tty_old_pgrp = NULL;
++ ++   sig->tty = NULL;
      
---- -  sig->utime = sig->stime = sig->cutime = sig->cstime = cputime_zero;
++++ +  sig->cutime = sig->cstime = cputime_zero;
        sig->gtime = cputime_zero;
        sig->cgtime = cputime_zero;
        sig->nvcsw = sig->nivcsw = sig->cnvcsw = sig->cnivcsw = 0;
@@@@@@@ -837,7 -837,7 -838,8 -837,7 -851,8 -838,8 +852,9 @@@@@@@
      
      void __cleanup_signal(struct signal_struct *sig)
      {
++++ +  thread_group_cputime_free(sig);
        exit_thread_group_keys(sig);
++ ++   tty_kref_put(sig->tty);
        kmem_cache_free(signal_cachep, sig);
      }
      

diff --cc kernel/hrtimer.c
index b8e4dce,4d761d5,cdec83e,b8e4dce,b8e4dce,cdec83e..95978f4
--- 1/kernel/hrtimer.c
--- 2/kernel/hrtimer.c
--- 3/kernel/hrtimer.c
--- 4/kernel/hrtimer.c
--- 5/kernel/hrtimer.c
--- 6/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@@@@@@ -1607,9 -1605,9 -1628,56 -1607,9 -1607,9 -1628,56 +1626,56 @@@@@@@ static int migrate_hrtimer_list(struct 
                 * Enqueue the timer. Allow reprogramming of the event device
                 */
                enqueue_hrtimer(timer, new_base, 1);
++ ++ 
++ ++ #ifdef CONFIG_HIGH_RES_TIMERS
++ ++           /*
++ ++            * Happens with high res enabled when the timer was
++ ++            * already expired and the callback mode is
++ ++            * HRTIMER_CB_IRQSAFE_UNLOCKED (hrtimer_sleeper). The
++ ++            * enqueue code does not move them to the soft irq
++ ++            * pending list for performance/latency reasons, but
++ ++            * in the migration state, we need to do that
++ ++            * otherwise we end up with a stale timer.
++ ++            */
++ ++           if (timer->state == HRTIMER_STATE_MIGRATE) {
++ ++                   timer->state = HRTIMER_STATE_PENDING;
++ ++                   list_add_tail(&timer->cb_entry,
++ ++                                 &new_base->cpu_base->cb_pending);
++ ++                   raise = 1;
++ ++           }
++ ++ #endif
++ ++           /* Clear the migration state bit */
++ ++           timer->state &= ~HRTIMER_STATE_MIGRATE;
 +      }
++ ++   return raise;
 +    }
 +    
++ ++ #ifdef CONFIG_HIGH_RES_TIMERS
++ ++ static int migrate_hrtimer_pending(struct hrtimer_cpu_base *old_base,
++ ++                              struct hrtimer_cpu_base *new_base)
++ ++ {
++ ++   struct hrtimer *timer;
++ ++   int raise = 0;
++ ++ 
++ ++   while (!list_empty(&old_base->cb_pending)) {
++ ++           timer = list_entry(old_base->cb_pending.next,
++ ++                              struct hrtimer, cb_entry);
++ ++ 
++ ++           __remove_hrtimer(timer, timer->base, HRTIMER_STATE_PENDING, 0);
++ ++           timer->base = &new_base->clock_base[timer->base->index];
++ ++           list_add_tail(&timer->cb_entry, &new_base->cb_pending);
++ ++           raise = 1;
+  ++   }
++ ++   return raise;
++ ++ }
++ ++ #else
++ ++ static int migrate_hrtimer_pending(struct hrtimer_cpu_base *old_base,
++ ++                              struct hrtimer_cpu_base *new_base)
++ ++ {
++ ++   return 0;
+  ++ }
++ ++ #endif
+  ++ 
      static void migrate_hrtimers(int cpu)
      {
        struct hrtimer_cpu_base *old_base, *new_base;
@@@@@@@ -1626,14 -1626,13 -1694,21 -1626,14 -1626,14 -1694,21 +1694,20 @@@@@@@
        spin_lock_nested(&old_base->lock, SINGLE_DEPTH_NESTING);
      
        for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) {
-- --           migrate_hrtimer_list(&old_base->clock_base[i],
-- --                                &new_base->clock_base[i]);
++ ++           if (migrate_hrtimer_list(&old_base->clock_base[i],
++ ++                                    &new_base->clock_base[i], cpu))
++ ++                   raise = 1;
        }
      
++ ++   if (migrate_hrtimer_pending(old_base, new_base))
++ ++           raise = 1;
++ ++ 
        spin_unlock(&old_base->lock);
- ----  spin_unlock(&new_base->lock);
- ----  local_irq_enable();
+ ++++  spin_unlock_irq(&new_base->lock);
        put_cpu_var(hrtimer_bases);
++ ++ 
++ ++   if (raise)
++ ++           hrtimer_raise_softirq();
      }
      #endif /* CONFIG_HOTPLUG_CPU */
      

diff --cc kernel/posix-timers.c
Simple merge

diff --cc kernel/sched.c
index 9a1ddb8,9a1ddb8,6f23059,1a5f73c,ebb03de,6f23059..09a8c15
--- 1/kernel/sched.c
--- 2/kernel/sched.c
--- 3/kernel/sched.c
--- 4/kernel/sched.c
--- 5/kernel/sched.c
--- 6/kernel/sched.c
+++ b/kernel/sched.c
@@@@@@@ -1425,9 -1425,9 -1418,35 -1425,9 -1425,9 -1418,35 +1418,35 @@@@@@@ up
        parent = parent->parent;
        if (parent)
                goto up;
++ ++ out_unlock:
        rcu_read_unlock();
++ ++ 
++ ++   return ret;
++  + }
++  + 
++ ++ static int tg_nop(struct task_group *tg, void *data)
++ ++ {
++ ++   return 0;
   +  }
++ ++ #endif
++ ++ 
++ ++ #ifdef CONFIG_SMP
++ ++ static unsigned long source_load(int cpu, int type);
++ ++ static unsigned long target_load(int cpu, int type);
++ ++ static int task_hot(struct task_struct *p, u64 now, struct sched_domain *sd);
++ ++ 
++ ++ static unsigned long cpu_avg_load_per_task(int cpu)
++ ++ {
++ ++   struct rq *rq = cpu_rq(cpu);
++ ++ 
++ ++   if (rq->nr_running)
++ ++           rq->avg_load_per_task = rq->load.weight / rq->nr_running;
++ ++ 
++ ++   return rq->avg_load_per_task;
++ ++ }
++ ++ 
++ ++ #ifdef CONFIG_FAIR_GROUP_SCHED
   +  
      static void __set_se_shares(struct sched_entity *se, unsigned long shares);
      
      /*
@@@@@@@ -8687,73 -8687,73 -8837,95 -8746,73 -8760,73 -8837,95 +8844,95 @@@@@@@ static DEFINE_MUTEX(rt_constraints_mute
      static unsigned long to_ratio(u64 period, u64 runtime)
      {
        if (runtime == RUNTIME_INF)
-- --           return 1ULL << 16;
++ ++           return 1ULL << 20;
      
-- --   return div64_u64(runtime << 16, period);
++ ++   return div64_u64(runtime << 20, period);
      }
      
-- -- #ifdef CONFIG_CGROUP_SCHED
-- -- static int __rt_schedulable(struct task_group *tg, u64 period, u64 runtime)
++ ++ /* Must be called with tasklist_lock held */
++ ++ static inline int tg_has_rt_tasks(struct task_group *tg)
      {
-- --   struct task_group *tgi, *parent = tg->parent;
-- --   unsigned long total = 0;
++ ++   struct task_struct *g, *p;
      
-- --   if (!parent) {
-- --           if (global_rt_period() < period)
-- --                   return 0;
++ ++   do_each_thread(g, p) {
++ ++           if (rt_task(p) && rt_rq_of_se(&p->rt)->tg == tg)
++ ++                   return 1;
++ ++   } while_each_thread(g, p);
      
-- --           return to_ratio(period, runtime) <
-- --                   to_ratio(global_rt_period(), global_rt_runtime());
-- --   }
++ ++   return 0;
++ ++ }
      
-- --   if (ktime_to_ns(parent->rt_bandwidth.rt_period) < period)
-- --           return 0;
++ ++ struct rt_schedulable_data {
++ ++   struct task_group *tg;
++ ++   u64 rt_period;
++ ++   u64 rt_runtime;
++ ++ };
      
-- --   rcu_read_lock();
-- --   list_for_each_entry_rcu(tgi, &parent->children, siblings) {
-- --           if (tgi == tg)
-- --                   continue;
++ ++ static int tg_schedulable(struct task_group *tg, void *data)
++ ++ {
++ ++   struct rt_schedulable_data *d = data;
++ ++   struct task_group *child;
++ ++   unsigned long total, sum = 0;
++ ++   u64 period, runtime;
++    
   --           total += to_ratio(ktime_to_ns(tgi->rt_bandwidth.rt_period),
   --                           tgi->rt_bandwidth.rt_runtime);
++ ++   period = ktime_to_ns(tg->rt_bandwidth.rt_period);
++ ++   runtime = tg->rt_bandwidth.rt_runtime;
   ++ 
--              total += to_ratio(ktime_to_ns(tgi->rt_bandwidth.rt_period),
--                              tgi->rt_bandwidth.rt_runtime);
++ ++   if (tg == d->tg) {
++ ++           period = d->rt_period;
++ ++           runtime = d->rt_runtime;
        }
-- --   rcu_read_unlock();
      
-- --   return total + to_ratio(period, runtime) <=
-- --           to_ratio(ktime_to_ns(parent->rt_bandwidth.rt_period),
-- --                           parent->rt_bandwidth.rt_runtime);
-- -- }
-- -- #elif defined CONFIG_USER_SCHED
-- -- static int __rt_schedulable(struct task_group *tg, u64 period, u64 runtime)
-- -- {
-- --   struct task_group *tgi;
-- --   unsigned long total = 0;
-- --   unsigned long global_ratio =
-- --           to_ratio(global_rt_period(), global_rt_runtime());
++ ++   /*
++ ++    * Cannot have more runtime than the period.
++ ++    */
++ ++   if (runtime > period && runtime != RUNTIME_INF)
++ ++           return -EINVAL;
      
-- --   rcu_read_lock();
-- --   list_for_each_entry_rcu(tgi, &task_groups, list) {
-- --           if (tgi == tg)
-- --                   continue;
++ ++   /*
++ ++    * Ensure we don't starve existing RT tasks.
++ ++    */
++ ++   if (rt_bandwidth_enabled() && !runtime && tg_has_rt_tasks(tg))
++ ++           return -EBUSY;
++ +  
    -           total += to_ratio(ktime_to_ns(tgi->rt_bandwidth.rt_period),
    -                           tgi->rt_bandwidth.rt_runtime);
++ ++   total = to_ratio(period, runtime);
++ ++ 
++ ++   /*
++ ++    * Nobody can have more than the global setting allows.
++ ++    */
++ ++   if (total > to_ratio(global_rt_period(), global_rt_runtime()))
++ ++           return -EINVAL;
   ++ 
--              total += to_ratio(ktime_to_ns(tgi->rt_bandwidth.rt_period),
--                              tgi->rt_bandwidth.rt_runtime);
++ ++   /*
++ ++    * The sum of our children's runtime should not exceed our own.
++ ++    */
++ ++   list_for_each_entry_rcu(child, &tg->children, siblings) {
++ ++           period = ktime_to_ns(child->rt_bandwidth.rt_period);
++ ++           runtime = child->rt_bandwidth.rt_runtime;
++ ++ 
++ ++           if (child == d->tg) {
++ ++                   period = d->rt_period;
++ ++                   runtime = d->rt_runtime;
++ ++           }
++  + 
   -            total += to_ratio(ktime_to_ns(tgi->rt_bandwidth.rt_period),
   -                            tgi->rt_bandwidth.rt_runtime);
++ ++           sum += to_ratio(period, runtime);
        }
-- --   rcu_read_unlock();
      
-- --   return total + to_ratio(period, runtime) < global_ratio;
++ ++   if (sum > total)
++ ++           return -EINVAL;
++ ++ 
++ ++   return 0;
      }
-- -- #endif
      
-- -- /* Must be called with tasklist_lock held */
-- -- static inline int tg_has_rt_tasks(struct task_group *tg)
++ ++ static int __rt_schedulable(struct task_group *tg, u64 period, u64 runtime)
      {
-- --   struct task_struct *g, *p;
-- --   do_each_thread(g, p) {
-- --           if (rt_task(p) && rt_rq_of_se(&p->rt)->tg == tg)
-- --                   return 1;
-- --   } while_each_thread(g, p);
-- --   return 0;
++ ++   struct rt_schedulable_data data = {
++ ++           .tg = tg,
++ ++           .rt_period = period,
++ ++           .rt_runtime = runtime,
++ ++   };
++ ++ 
++ ++   return walk_tg_tree(tg_schedulable, tg_nop, &data);
      }
      
      static int tg_set_bandwidth(struct task_group *tg,

diff --cc kernel/sched_fair.c
Simple merge

diff --cc kernel/sched_rt.c
Simple merge

diff --cc kernel/softirq.c
Simple merge

diff --cc kernel/sys.c
Simple merge

diff --cc kernel/time/ntp.c
Simple merge

diff --cc kernel/time/timekeeping.c
Simple merge

diff --cc kernel/timer.c
Simple merge

diff --cc security/selinux/hooks.c
Simple merge