Re: Synchronization Techniques in 2.2 Kernel

From: David Woodhouse (
Date: Thu Sep 27 2001 - 16:07:24 EST said:
> I apologize in advance if this is not quite right, having only done
> "hello world" kernel modules thus far (plus a good deal of kernel
> source browsing). I think you need to "unfold" the
> interruptible_sleep_on call and do it yourself by adding current to
> the wait queue before checking any cards, setting current->state =
> TASK_INTERRUPTIBLE, then checking all cards and if none has data,
> calling schedule.

You're right. It is very difficult to use sleep_on() and friends safely,
and for that reason the plan is (or at least _has_ been) to take them all
away in 2.5.


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