Messages in this thread | | | From | Oliver Neukum <> | Subject | Re: [RFC] Driver writer's guide to sleeping | Date | Sun, 26 Jun 2005 21:38:03 +0200 |
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Am Samstag, 25. Juni 2005 13:54 schrieb Denis Vlasenko: > On Saturday 25 June 2005 14:29, Oliver Neukum wrote: > > 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 > [snip] > > > 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() > > Like this?
Yes, but we have macros for that. You are supposed to use them.
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