Re: F00F...

Eric S. Raymond (esr@thyrsus.com)
Wed, 2 Sep 1998 13:20:14 -0400

Thomas Bogendoerfer <tsbogend@alpha.franken.de>:
> > IIRC, check_bugs() was moved to after smp_begin() for some reason. So
> > your patch may break something again.
>
> yes, it will break P5 SMP boxes, because check_bugs() makes the interrupt
> vector table read only. smp_begin() doesn't like this, when setting up io-apic,
> because it needs to change the interrupt vector table.
>
> The order has been this way for a long time, but got changed in 2.1.112 and
> changed back in 2.1.115, because of the P5 SMP problems.

Is there a comment in the source explaining this?

If not, there should be!

-- 
		<a href="http://www.tuxedo.org/~esr">Eric S. Raymond</a>


"Today, we need a nation of Minutemen, citizens who are not only prepared to
take arms, but citizens who regard the preservation of freedom as the basic
purpose of their daily life and who are willing to consciously work and
sacrifice for that freedom."
	-- John F. Kennedy


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