Messages in this thread | | | Date | Sat, 25 Jun 2005 13:29:02 +0200 (CEST) | From | Oliver Neukum <> | Subject | Re: [RFC] Driver writer's guide to sleeping |
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On Sat, 25 Jun 2005, Denis Vlasenko wrote:
> schedule_timeout(timeout) > Whee, it has a comment! :) > * %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. > Thus: > set_current_state(TASK_[UN]INTERRUPTIBLE); > schedule_timeout(timeout_in_jiffies) > > msleep(ms) > Sleeps at least ms msecs. > Equivalent to: > set_current_state(TASK_UNINTERRUPTIBLE); > schedule_timeout(timeout)
If and only if you are not on any waitqueue. You may not be interrupted by a signal, but you still can be woken with an explicit wake_up()
HTH Oliver
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