Re: [RFC][PATCH] linux-2.5.59_lost-tick_A0

Date: Wed Jan 22 2003 - 00:00:43 EST

On Tue, 21 Jan 2003 15:32:55 PST, Andrew Morton said:
> john stultz wrote:
> >
> > All,
> > This patch addresses the following problem: Linux cannot properly
> > handle the case where interrupts are disabled for longer then two ticks.
> >
> Question is: who is holding interrupts off for so long?

Dell Latitude C840 - if you use APM, you drop clock ticks. And that's
even *with* CONFIG_APM_ALLOW_INTS. I think I've caught the i8k driver
doing it as well - it seems to be a generic BIOS fuckage. Make a BIOS
call, drop some ticks. And unless somebody has a BIOS flash that works
better than Dell's C840A07, we're stuck with it....

				Valdis Kletnieks
				Computer Systems Senior Engineer
				Virginia Tech

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