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schedule_timeout(9) [centos man page]

SCHEDULE_TIMEOUT(9)						   Driver Basics					       SCHEDULE_TIMEOUT(9)

NAME
schedule_timeout - sleep until timeout SYNOPSIS
signed long __sched schedule_timeout(signed long timeout); ARGUMENTS
timeout timeout value in jiffies DESCRIPTION
Make the current task sleep until timeout jiffies have elapsed. The routine will return immediately unless the current task state has been set (see set_current_state). You can set the task state as follows - TASK_UNINTERRUPTIBLE - at least timeout jiffies are guaranteed to pass before the routine returns. The routine will return 0 TASK_INTERRUPTIBLE - the routine may return early if a signal is delivered to the current task. In this case the remaining time in jiffies will be returned, or 0 if the timer expired in time The current task state is guaranteed to be TASK_RUNNING when this routine returns. Specifying a timeout value of MAX_SCHEDULE_TIMEOUT will schedule the CPU away without a bound on the timeout. In this case the return value will be MAX_SCHEDULE_TIMEOUT. In all cases the return value is guaranteed to be non-negative. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 SCHEDULE_TIMEOUT(9)

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SCHEDULE_HRTIMEOUT_R(9) 					   Driver Basics					   SCHEDULE_HRTIMEOUT_R(9)

NAME
schedule_hrtimeout_range - sleep until timeout SYNOPSIS
int __sched schedule_hrtimeout_range(ktime_t * expires, unsigned long delta, const enum hrtimer_mode mode); ARGUMENTS
expires timeout value (ktime_t) delta slack in expires timeout (ktime_t) mode timer mode, HRTIMER_MODE_ABS or HRTIMER_MODE_REL DESCRIPTION
Make the current task sleep until the given expiry time has elapsed. The routine will return immediately unless the current task state has been set (see set_current_state). The delta argument gives the kernel the freedom to schedule the actual wakeup to a time that is both power and performance friendly. The kernel give the normal best effort behavior for "expires+delta", but may decide to fire the timer earlier, but no earlier than expires. You can set the task state as follows - TASK_UNINTERRUPTIBLE - at least timeout time is guaranteed to pass before the routine returns. TASK_INTERRUPTIBLE - the routine may return early if a signal is delivered to the current task. The current task state is guaranteed to be TASK_RUNNING when this routine returns. Returns 0 when the timer has expired otherwise -EINTR COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 SCHEDULE_HRTIMEOUT_R(9)
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