Messages in this thread | | | From | "Manfred Spraul" <> | Subject | Re: Serial port latency | Date | Thu, 29 Mar 2001 09:58:31 +0200 |
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From: "Pavel Machek" <pavel@suse.cz> > > 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.
What about creating a special cpu_is_idle() function that the idle functions must call before sleeping?
-- Manfred
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