On Mon, 10 Jan 2000, Eric Gilmore wrote:
> I tried this and the system finally booted on the SMP kernel. However, I
> am wondering, are there any drawbacks to disabling APIC?
The interrupt subsystem runs in DOS compatibility mode which sucks
horribly and also in this mode only the boot CPU receives interrupts.
> The motherboard is HP's motherboard. The part number on the motherboard is
> D2182-60001. It has a dual-processor CPU card with 2 66MHz Pentium
> processors. It appears to be using an Intel, possibly DX (??), chipset
> (There are quite a few chips on the motherboard with Intel's logo on them).
This must be an 82489DX APIC based motherboard. Because of a few slight
differences between these chips and the later integrated APIC, there is
probably no way to run 2.2.x in the symmetrical I/O mode (i.e. with APICs
running in their native mode) on it. Also due to the chips being external
there is a possibility of some wiring weirdness as the Intel's MPS gives
relatively loose rules in this area.
On the other hand, 2.3.x kernels (starting from 2.3.19) contain some
changes which are an attempt to make such boards run. Testers are needed
definitely.
For a start, please send a complete kernel log from a startup till a
crash. Use a recent 2.3.3x kernel and make sure SMP_DEBUG is set to 1 in
arch/i386/kernel/smpboot.c.
Good luck,
Maciej
--
+ Maciej W. Rozycki, Technical University of Gdansk, Poland +
+--------------------------------------------------------------+
+ e-mail: [EMAIL PROTECTED], PGP key available +
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