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SubjectRe: Sleeping on the job
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> > I need to do some delays in kernel code.
> > - each delay is under 3ms (max delay time is not critical)
> > - interrupts are enabled
> > - it could be several seconds before the kernel code returns to user space
> > As I understand it, this could be a problem(?) as it stays in the
> > kernel for so long.
> >
> > What is the best way to handle this (do I need to worry about it)?
> > Currently I'm just ignoring the fact that the delays can be long; it
> > doesn't cause me any trouble, but I'm on a single user/CPU system.
>
> there's no mechanism to sleep for less than a scheduler quantum;
> that's 10 ms in normal x86 linux.

Ya, I know that. But do I need to worry about delays that are over
10ms (possibly a few seconds) in kernel code? If so, what and how
should I handle it?

--
Andrew E. Mileski
mailto:aem@ott.hookup.net http://www.redhat.com/~aem/
Linux Plug-and-Play Project http://www.redhat.com/pnp/


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