#include <linux/completion.h>
#include <linux/pid.h>
#include <linux/percpu.h>
+#include <linux/topology.h>
struct exec_domain;
extern int exec_shield;
atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */
int map_count; /* number of VMAs */
struct rw_semaphore mmap_sem;
- spinlock_t page_table_lock; /* Protects task page tables and mm->rss */
+ spinlock_t page_table_lock; /* Protects page tables, mm->rss, mm->anon_rss */
- struct list_head mmlist; /* List of all active mm's. These are globally strung
+ struct list_head mmlist; /* List of maybe swapped mm's. These are globally strung
* together off init_mm.mmlist, and are protected
* by mmlist_lock
*/
unsigned long start_brk, brk, start_stack;
unsigned long arg_start, arg_end, env_start, env_end;
unsigned long rss, anon_rss, total_vm, locked_vm, shared_vm;
- unsigned long exec_vm, stack_vm, reserved_vm, def_flags;
+ unsigned long exec_vm, stack_vm, reserved_vm, def_flags, nr_ptes;
unsigned long saved_auxv[42]; /* for /proc/PID/auxv */
#endif
};
-extern int mmlist_nr;
-
struct sighand_struct {
atomic_t count;
struct k_sigaction action[_NSIG];
*/
struct signal_struct {
atomic_t count;
+ atomic_t live;
/* current thread group signal load-balancing target: */
task_t *curr_target;
unsigned long utime, stime, cutime, cstime;
unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
+
+ /*
+ * We don't bother to synchronize most readers of this at all,
+ * because there is no reader checking a limit that actually needs
+ * to get both rlim_cur and rlim_max atomically, and either one
+ * alone is a single word that can safely be read normally.
+ * getrlimit/setrlimit use task_lock(current->group_leader) to
+ * protect this instead of the siglock, because they really
+ * have no need to disable irqs.
+ */
+ struct rlimit rlim[RLIM_NLIMITS];
};
/*
unsigned long mq_bytes; /* How many bytes can be allocated to mqueue? */
unsigned long locked_shm; /* How many pages of mlocked shm ? */
+#ifdef CONFIG_KEYS
+ struct key *uid_keyring; /* UID specific keyring */
+ struct key *session_keyring; /* UID's default session keyring */
+#endif
+
/* Hash table maintenance information */
struct list_head uidhash_list;
uid_t uid;
struct backing_dev_info;
struct reclaim_state;
-/* POSIX.1b interval timer structure. */
-struct k_itimer {
- struct list_head list; /* free/ allocate list */
- spinlock_t it_lock;
- clockid_t it_clock; /* which timer type */
- timer_t it_id; /* timer id */
- int it_overrun; /* overrun on pending signal */
- int it_overrun_last; /* overrun on last delivered signal */
- int it_requeue_pending; /* waiting to requeue this timer */
- int it_sigev_notify; /* notify word of sigevent struct */
- int it_sigev_signo; /* signo word of sigevent struct */
- sigval_t it_sigev_value; /* value word of sigevent struct */
- unsigned long it_incr; /* interval specified in jiffies */
- struct task_struct *it_process; /* process to send signal to */
- struct timer_list it_timer;
- struct sigqueue *sigq; /* signal queue entry. */
- struct list_head abs_timer_entry; /* clock abs_timer_list */
- struct timespec wall_to_prev; /* wall_to_monotonic used when set */
-};
-
#ifdef CONFIG_SCHEDSTATS
struct sched_info {
/* cumulative counters */
extern struct file_operations proc_schedstat_operations;
#endif
+enum idle_type
+{
+ SCHED_IDLE,
+ NOT_IDLE,
+ NEWLY_IDLE,
+ MAX_IDLE_TYPES
+};
+
+/*
+ * sched-domains (multiprocessor balancing) declarations:
+ */
+#ifdef CONFIG_SMP
+#define SCHED_LOAD_SCALE 128UL /* increase resolution of load */
+
+#define SD_LOAD_BALANCE 1 /* Do load balancing on this domain. */
+#define SD_BALANCE_NEWIDLE 2 /* Balance when about to become idle */
+#define SD_BALANCE_EXEC 4 /* Balance on exec */
+#define SD_WAKE_IDLE 8 /* Wake to idle CPU on task wakeup */
+#define SD_WAKE_AFFINE 16 /* Wake task to waking CPU */
+#define SD_WAKE_BALANCE 32 /* Perform balancing at task wakeup */
+#define SD_SHARE_CPUPOWER 64 /* Domain members share cpu power */
+
+struct sched_group {
+ struct sched_group *next; /* Must be a circular list */
+ cpumask_t cpumask;
+
+ /*
+ * CPU power of this group, SCHED_LOAD_SCALE being max power for a
+ * single CPU. This is read only (except for setup, hotplug CPU).
+ */
+ unsigned long cpu_power;
+};
+
+struct sched_domain {
+ /* These fields must be setup */
+ struct sched_domain *parent; /* top domain must be null terminated */
+ struct sched_group *groups; /* the balancing groups of the domain */
+ cpumask_t span; /* span of all CPUs in this domain */
+ unsigned long min_interval; /* Minimum balance interval ms */
+ unsigned long max_interval; /* Maximum balance interval ms */
+ unsigned int busy_factor; /* less balancing by factor if busy */
+ unsigned int imbalance_pct; /* No balance until over watermark */
+ unsigned long long cache_hot_time; /* Task considered cache hot (ns) */
+ unsigned int cache_nice_tries; /* Leave cache hot tasks for # tries */
+ unsigned int per_cpu_gain; /* CPU % gained by adding domain cpus */
+ int flags; /* See SD_* */
+
+ /* Runtime fields. */
+ unsigned long last_balance; /* init to jiffies. units in jiffies */
+ unsigned int balance_interval; /* initialise to 1. units in ms. */
+ unsigned int nr_balance_failed; /* initialise to 0 */
+
+#ifdef CONFIG_SCHEDSTATS
+ /* load_balance() stats */
+ unsigned long lb_cnt[MAX_IDLE_TYPES];
+ unsigned long lb_failed[MAX_IDLE_TYPES];
+ unsigned long lb_imbalance[MAX_IDLE_TYPES];
+ unsigned long lb_nobusyg[MAX_IDLE_TYPES];
+ unsigned long lb_nobusyq[MAX_IDLE_TYPES];
+
+ /* sched_balance_exec() stats */
+ unsigned long sbe_attempts;
+ unsigned long sbe_pushed;
+
+ /* try_to_wake_up() stats */
+ unsigned long ttwu_wake_affine;
+ unsigned long ttwu_wake_balance;
+#endif
+};
+
+#ifdef ARCH_HAS_SCHED_DOMAIN
+/* Useful helpers that arch setup code may use. Defined in kernel/sched.c */
+extern cpumask_t cpu_isolated_map;
+extern void init_sched_build_groups(struct sched_group groups[],
+ cpumask_t span, int (*group_fn)(int cpu));
+extern void cpu_attach_domain(struct sched_domain *sd, int cpu);
+#endif /* ARCH_HAS_SCHED_DOMAIN */
+#endif /* CONFIG_SMP */
+
+
struct io_context; /* See blkdev.h */
void exit_io_context(void);
kernel_cap_t cap_effective, cap_inheritable, cap_permitted;
unsigned keep_capabilities:1;
struct user_struct *user;
-/* limits */
- struct rlimit rlim[RLIM_NLIMITS];
+#ifdef CONFIG_KEYS
+ struct key *session_keyring; /* keyring inherited over fork */
+ struct key *process_keyring; /* keyring private to this process (CLONE_THREAD) */
+ struct key *thread_keyring; /* keyring private to this thread */
+#endif
unsigned short used_math;
char comm[16];
/* file system info */
/* Thread group tracking */
u32 parent_exec_id;
u32 self_exec_id;
-/* Protection of (de-)allocation: mm, files, fs, tty */
+/* Protection of (de-)allocation: mm, files, fs, tty, keyrings */
spinlock_t alloc_lock;
/* Protection of proc_dentry: nesting proc_lock, dcache_lock, write_lock_irq(&tasklist_lock); */
spinlock_t proc_lock;
return tsk->signal->pgrp;
}
+/**
+ * pid_alive - check that a task structure is not stale
+ * @p: Task structure to be checked.
+ *
+ * Test if a process is not yet dead (at most zombie state)
+ * If pid_alive fails, then pointers within the task structure
+ * can be stale and must not be dereferenced.
+ */
+static inline int pid_alive(struct task_struct *p)
+{
+ return p->pids[PIDTYPE_PID].nr != 0;
+}
+
extern void free_task(struct task_struct *tsk);
extern void __put_task_struct(struct task_struct *tsk);
#define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
#define PF_SWAPOFF 0x00080000 /* I am in swapoff */
#define PF_LESS_THROTTLE 0x00100000 /* Throttle me less: I clean memory */
#define PF_SYNCWRITE 0x00200000 /* I am doing a sync write */
-#define PF_RELOCEXEC 0x00400000 /* relocate shared libraries */
-
-#define PF_MEMIO 0x00400000 /* I am potentially doing I/O for mem */
-#define PF_IOWAIT 0x00800000 /* I am waiting on disk I/O */
+#define PF_BORROWED_MM 0x00400000 /* I am a kthread doing use_mm */
+#define PF_RELOCEXEC 0x00800000 /* relocate shared libraries */
+#define PF_MEMIO 0x01000000 /* I am potentially doing I/O for mem */
+#define PF_IOWAIT 0x02000000 /* I am waiting on disk I/O */
#ifdef CONFIG_SMP
extern int set_cpus_allowed(task_t *p, cpumask_t new_mask);
#include <asm/current.h>
-extern unsigned long itimer_ticks;
-extern unsigned long itimer_next;
extern void do_timer(struct pt_regs *);
extern int FASTCALL(wake_up_state(struct task_struct * tsk, unsigned int state));
extern void unhash_process(struct task_struct *p);
/*
- * Protects ->fs, ->files, ->mm, ->ptrace, ->group_info, ->comm and
- * synchronises with wait4().
+ * Protects ->fs, ->files, ->mm, ->ptrace, ->group_info, ->comm, keyring
+ * subscriptions and synchronises with wait4(). Also used in procfs.
*
* Nests both inside and outside of read_lock(&tasklist_lock).
* It must not be nested with write_lock_irq(&tasklist_lock),
}
extern void __cond_resched(void);
-
static inline void cond_resched(void)
{
-#ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
- __might_sleep(__FILE__, __LINE__, 0);
-#endif
- __cond_resched();
+ if (need_resched())
+ __cond_resched();
}
/*
* operations here to prevent schedule() from being called twice (once via
* spin_unlock(), once by hand).
*/
-extern void __cond_resched_lock(spinlock_t * lock);
-
static inline void cond_resched_lock(spinlock_t * lock)
{
-#ifdef CONFIG_DEBUG_SPINLOCK_SLEEP
- __might_sleep(__FILE__, __LINE__, 1);
-#endif
- __cond_resched_lock(lock);
+ if (need_resched()) {
+ _raw_spin_unlock(lock);
+ preempt_enable_no_resched();
+ __cond_resched();
+ spin_lock(lock);
+ }
}
/* Reevaluate whether the task has signals pending delivery.
extern long sched_setaffinity(pid_t pid, cpumask_t new_mask);
extern long sched_getaffinity(pid_t pid, cpumask_t *mask);
+#ifdef CONFIG_MAGIC_SYSRQ
+
+extern void normalize_rt_tasks(void);
+
+#endif
+
#endif /* __KERNEL__ */
#endif
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