Merge branch 'linus' into core/softlockup

Conflicts:

	kernel/softlockup.c

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 48 insertions, 29 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 69760a379b6d..7b2a356b97fc 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -134,7 +134,6 @@ extern unsigned long nr_running(void);
 extern unsigned long nr_uninterruptible(void);
 extern unsigned long nr_active(void);
 extern unsigned long nr_iowait(void);
-extern unsigned long weighted_cpuload(const int cpu);
 
 struct seq_file;
 struct cfs_rq;
@@ -246,6 +245,8 @@ extern asmlinkage void schedule_tail(struct task_struct *prev);
 extern void init_idle(struct task_struct *idle, int cpu);
 extern void init_idle_bootup_task(struct task_struct *idle);
 
+extern int runqueue_is_locked(void);
+
 extern cpumask_t nohz_cpu_mask;
 #if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ)
 extern int select_nohz_load_balancer(int cpu);
@@ -785,6 +786,8 @@ struct sched_domain {
         unsigned int balance_interval;  /* initialise to 1. units in ms. */
         unsigned int nr_balance_failed; /* initialise to 0 */
 
+        u64 last_update;
+
 #ifdef CONFIG_SCHEDSTATS
         /* load_balance() stats */
         unsigned int lb_count[CPU_MAX_IDLE_TYPES];
@@ -824,23 +827,6 @@ extern int arch_reinit_sched_domains(void);
 
 #endif  /* CONFIG_SMP */
 
-/*
- * A runqueue laden with a single nice 0 task scores a weighted_cpuload of
- * SCHED_LOAD_SCALE. This function returns 1 if any cpu is laden with a
- * task of nice 0 or enough lower priority tasks to bring up the
- * weighted_cpuload
- */
-static inline int above_background_load(void)
-{
-        unsigned long cpu;
-
-        for_each_online_cpu(cpu) {
-                if (weighted_cpuload(cpu) >= SCHED_LOAD_SCALE)
-                        return 1;
-        }
-        return 0;
-}
-
 struct io_context;                      /* See blkdev.h */
 #define NGROUPS_SMALL           32
 #define NGROUPS_PER_BLOCK       ((unsigned int)(PAGE_SIZE / sizeof(gid_t)))
@@ -922,8 +908,8 @@ struct sched_class {
         void (*set_cpus_allowed)(struct task_struct *p,
                                  const cpumask_t *newmask);
 
-        void (*join_domain)(struct rq *rq);
-        void (*leave_domain)(struct rq *rq);
+        void (*rq_online)(struct rq *rq);
+        void (*rq_offline)(struct rq *rq);
 
         void (*switched_from) (struct rq *this_rq, struct task_struct *task,
                                int running);
@@ -1040,6 +1026,7 @@ struct task_struct {
 #endif
 
         int prio, static_prio, normal_prio;
+        unsigned int rt_priority;
         const struct sched_class *sched_class;
         struct sched_entity se;
         struct sched_rt_entity rt;
@@ -1123,7 +1110,6 @@ struct task_struct {
         int __user *set_child_tid;              /* CLONE_CHILD_SETTID */
         int __user *clear_child_tid;            /* CLONE_CHILD_CLEARTID */
 
-        unsigned int rt_priority;
         cputime_t utime, stime, utimescaled, stimescaled;
         cputime_t gtime;
         cputime_t prev_utime, prev_stime;
@@ -1142,12 +1128,12 @@ struct task_struct {
         gid_t gid,egid,sgid,fsgid;
         struct group_info *group_info;
         kernel_cap_t   cap_effective, cap_inheritable, cap_permitted, cap_bset;
-        unsigned securebits;
         struct user_struct *user;
+        unsigned securebits;
 #ifdef CONFIG_KEYS
+        unsigned char jit_keyring;      /* default keyring to attach requested keys to */
         struct key *request_key_auth;   /* assumed request_key authority */
         struct key *thread_keyring;     /* keyring private to this thread */
-        unsigned char jit_keyring;      /* default keyring to attach requested keys to */
 #endif
         char comm[TASK_COMM_LEN]; /* executable name excluding path
                                      - access with [gs]et_task_comm (which lock
@@ -1234,8 +1220,8 @@ struct task_struct {
 # define MAX_LOCK_DEPTH 48UL
         u64 curr_chain_key;
         int lockdep_depth;
-        struct held_lock held_locks[MAX_LOCK_DEPTH];
         unsigned int lockdep_recursion;
+        struct held_lock held_locks[MAX_LOCK_DEPTH];
 #endif
 
 /* journalling filesystem info */
@@ -1263,10 +1249,6 @@ struct task_struct {
         u64 acct_vm_mem1;       /* accumulated virtual memory usage */
         cputime_t acct_stimexpd;/* stime since last update */
 #endif
-#ifdef CONFIG_NUMA
-        struct mempolicy *mempolicy;
-        short il_next;
-#endif
 #ifdef CONFIG_CPUSETS
         nodemask_t mems_allowed;
         int cpuset_mems_generation;
@@ -1286,6 +1268,10 @@ struct task_struct {
         struct list_head pi_state_list;
         struct futex_pi_state *pi_state_cache;
 #endif
+#ifdef CONFIG_NUMA
+        struct mempolicy *mempolicy;
+        short il_next;
+#endif
         atomic_t fs_excl;       /* holding fs exclusive resources */
         struct rcu_head rcu;
 
@@ -1505,6 +1491,7 @@ static inline void put_task_struct(struct task_struct *t)
 #define PF_SWAPWRITE    0x00800000      /* Allowed to write to swap */
 #define PF_SPREAD_PAGE  0x01000000      /* Spread page cache over cpuset */
 #define PF_SPREAD_SLAB  0x02000000      /* Spread some slab caches over cpuset */
+#define PF_THREAD_BOUND 0x04000000      /* Thread bound to specific cpu */
 #define PF_MEMPOLICY    0x10000000      /* Non-default NUMA mempolicy */
 #define PF_MUTEX_TESTER 0x20000000      /* Thread belongs to the rt mutex tester */
 #define PF_FREEZER_SKIP 0x40000000      /* Freezer should not count it as freezeable */
@@ -1574,13 +1561,28 @@ static inline void sched_clock_idle_sleep_event(void)
 static inline void sched_clock_idle_wakeup_event(u64 delta_ns)
 {
 }
-#else
+
+#ifdef CONFIG_NO_HZ
+static inline void sched_clock_tick_stop(int cpu)
+{
+}
+
+static inline void sched_clock_tick_start(int cpu)
+{
+}
+#endif
+
+#else /* CONFIG_HAVE_UNSTABLE_SCHED_CLOCK */
 extern void sched_clock_init(void);
 extern u64 sched_clock_cpu(int cpu);
 extern void sched_clock_tick(void);
 extern void sched_clock_idle_sleep_event(void);
 extern void sched_clock_idle_wakeup_event(u64 delta_ns);
+#ifdef CONFIG_NO_HZ
+extern void sched_clock_tick_stop(int cpu);
+extern void sched_clock_tick_start(int cpu);
 #endif
+#endif /* CONFIG_HAVE_UNSTABLE_SCHED_CLOCK */
 
 /*
  * For kernel-internal use: high-speed (but slightly incorrect) per-cpu
@@ -1623,6 +1625,7 @@ extern unsigned int sysctl_sched_child_runs_first;
 extern unsigned int sysctl_sched_features;
 extern unsigned int sysctl_sched_migration_cost;
 extern unsigned int sysctl_sched_nr_migrate;
+extern unsigned int sysctl_sched_shares_ratelimit;
 
 int sched_nr_latency_handler(struct ctl_table *table, int write,
                 struct file *file, void __user *buffer, size_t *length,
@@ -1656,6 +1659,8 @@ extern int can_nice(const struct task_struct *p, const int nice);
 extern int task_curr(const struct task_struct *p);
 extern int idle_cpu(int cpu);
 extern int sched_setscheduler(struct task_struct *, int, struct sched_param *);
+extern int sched_setscheduler_nocheck(struct task_struct *, int,
+                                      struct sched_param *);
 extern struct task_struct *idle_task(int cpu);
 extern struct task_struct *curr_task(int cpu);
 extern void set_curr_task(int cpu, struct task_struct *p);
@@ -2132,6 +2137,18 @@ static inline void arch_pick_mmap_layout(struct mm_struct *mm)
 }
 #endif
 
+#ifdef CONFIG_TRACING
+extern void
+__trace_special(void *__tr, void *__data,
+                unsigned long arg1, unsigned long arg2, unsigned long arg3);
+#else
+static inline void
+__trace_special(void *__tr, void *__data,
+                unsigned long arg1, unsigned long arg2, unsigned long arg3)
+{
+}
+#endif
+
 extern long sched_setaffinity(pid_t pid, const cpumask_t *new_mask);
 extern long sched_getaffinity(pid_t pid, cpumask_t *mask);
 
@@ -2226,6 +2243,8 @@ static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
 }
 #endif /* CONFIG_MM_OWNER */
 
+#define TASK_STATE_TO_CHAR_STR "RSDTtZX"
+
 #endif /* __KERNEL__ */
 
 #endif