2.6.x BUGs at boot time (APIC related)

[Denis Vlasenko]

This is happening on a "HP Compaq dc7100 CMT"
(I believe it is a model number - taken from the label on the box).

Both 2.6.9 and 2.6.10-rc3 are dying this way:

[top of visible screen]
I/O APIC #1 Version 17 at 0xFEC00000
Enabled APIC mode: Flat. Using 1 I/O APICs
...
[unrelated stuff (dentry cache size etc...)]
...
Enabling fast FPU save & restore ...done
Enabling unmasked SIMD FPU exception support ...done
Checking 'hlt' instruction ..OK
------------------------
kernel BUG at arch/i386/kernel/apic.c:388! [:366! for 2.6.9]


Code:
....
void __init setup_local_APIC (void)
{
        ...
        /*
         * Double-check whether this APIC is really registered.
         */
        if (!apic_id_registered())
                BUG();   <=========================

2.4.27-rc3 boots just fine on the same hardware.
oops, lspci and .config's are in attached tarball.
--
vda

Attachment: BUG_APIC.tar.bz2
Description: application/tbz