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SubjectRe: Serial port latency
Hi!

> > > Is the computer otherwise idle?
> > > I've seen one unexplainable report with atm problems that
> disappeared
> > > (!) if a kernel compile was running.
> >
> > I've seen similar bugs. If you hook something on schedule_tq and
> forget
> > to set current->need_resched, this is exactly what you get.
> >
> I'm running with a patch that printk's if cpu_idle() is called while a
> softirq is pending.
> If I access the floppy on my K6/200 every track triggers the check, and
> sometimes the console blanking code triggers it.

Seems floppy and console is buggy, then.

> What about creating a special cpu_is_idle() function that the idle
> functions must call before sleeping?

I'd say just fix all the bugs.
Pavel
--
The best software in life is free (not shareware)! Pavel
GCM d? s-: !g p?:+ au- a--@ w+ v- C++@ UL+++ L++ N++ E++ W--- M- Y- R+
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