Messages in this thread | | | Date | Mon, 27 Jun 2005 09:04:27 -0700 | From | Nish Aravamudan <> | Subject | Re: [RFC] Driver writer's guide to sleeping |
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On 6/25/05, Denis Vlasenko <vda@ilport.com.ua> wrote: > Hi folks, > > I'm working on a Linux wireless driver. > > I compiled a little guide for myself about waiting primitives. > I would appreciate if you look thru it. Maybe I'm wrong somewhere.
<snip> > schedule_timeout(timeout) <snip> > msleep(ms) <snip> > msleep_interruptible(ms) <snip>
So, there are four cases in the schedule_timeout() family of sleeps, based one what you would like to be woken up on:
Signals and Waitqueue events: set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(some_time_in_jiffies);
Signals only: msleep_interruptible(some_time_in_msecs);
Waitqueue events only: set_current_state(TASK_UNINTERRUPTIBLE); schedule_timeout(some_time_in_jiffies);
Neither signals nor waitqueues: msleep(some_time_in_msecs);
Hopefully that clears some things up.
w.r.t to wait-queue event sleeping, you probably should also be aware of the wait_event() family of macros.
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