diff options
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 1e5f70062a9c..7200c1bb8dde 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -296,6 +296,9 @@ extern void sched_show_task(struct task_struct *p); extern void softlockup_tick(void); extern void touch_softlockup_watchdog(void); extern void touch_all_softlockup_watchdogs(void); +extern int proc_dosoftlockup_thresh(struct ctl_table *table, int write, + struct file *filp, void __user *buffer, + size_t *lenp, loff_t *ppos); extern unsigned int softlockup_panic; extern unsigned long sysctl_hung_task_check_count; extern unsigned long sysctl_hung_task_timeout_secs; @@ -443,6 +446,7 @@ struct pacct_struct { * @utime: time spent in user mode, in &cputime_t units * @stime: time spent in kernel mode, in &cputime_t units * @sum_exec_runtime: total time spent on the CPU, in nanoseconds + * @lock: lock for fields in this struct * * This structure groups together three kinds of CPU time that are * tracked for threads and thread groups. Most things considering @@ -453,6 +457,7 @@ struct task_cputime { cputime_t utime; cputime_t stime; unsigned long long sum_exec_runtime; + spinlock_t lock; }; /* Alternate field names when used to cache expirations. */ #define prof_exp stime @@ -468,7 +473,7 @@ struct task_cputime { * used for thread group CPU clock calculations. */ struct thread_group_cputime { - struct task_cputime *totals; + struct task_cputime totals; }; /* @@ -629,7 +634,6 @@ struct user_struct { atomic_t inotify_devs; /* How many inotify devs does this user have opened? */ #endif #ifdef CONFIG_EPOLL - atomic_t epoll_devs; /* The number of epoll descriptors currently open */ atomic_t epoll_watches; /* The number of file descriptors currently watched */ #endif #ifdef CONFIG_POSIX_MQUEUE @@ -2197,24 +2201,30 @@ static inline int spin_needbreak(spinlock_t *lock) * Thread group CPU time accounting. */ -extern int thread_group_cputime_alloc(struct task_struct *); -extern void thread_group_cputime(struct task_struct *, struct task_cputime *); - -static inline void thread_group_cputime_init(struct signal_struct *sig) +static inline +void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times) { - sig->cputime.totals = NULL; + struct task_cputime *totals = &tsk->signal->cputime.totals; + unsigned long flags; + + spin_lock_irqsave(&totals->lock, flags); + *times = *totals; + spin_unlock_irqrestore(&totals->lock, flags); } -static inline int thread_group_cputime_clone_thread(struct task_struct *curr) +static inline void thread_group_cputime_init(struct signal_struct *sig) { - if (curr->signal->cputime.totals) - return 0; - return thread_group_cputime_alloc(curr); + sig->cputime.totals = (struct task_cputime){ + .utime = cputime_zero, + .stime = cputime_zero, + .sum_exec_runtime = 0, + }; + + spin_lock_init(&sig->cputime.totals.lock); } static inline void thread_group_cputime_free(struct signal_struct *sig) { - free_percpu(sig->cputime.totals); } /* |