Re: USE_ELCR_TRIGGER_LEVEL removed in 2.2.6 -> linux broken for HP-XU

[James Bottomley]

> In 2.2.6 kernel, the USE_ELCR_TRIGGER_LEVEL option has been removed
> from io_apic.c As a result, the kernel (I tested 2.2.9) is completely
> unreliable for HP-XU Pentium based SMP PCs.

use the ELCR if it finds one.

I bet the EISA detection routines are failing in your case, could you turn on 
SMP debugging (uncomment the #define SMP_DEBUG in arch/i386/kernel/smp.c) and 
post the output.  If you haven't got a serial console to copy from and the 
machine crashes too early to take it from dmesg, what I'm looking for is how 
the MPC table identifies the bus (or whether it uses a default MPC table) and 
what the DC390 interrupt is flagged as in the MPC table.  (doing a cat of 
/proc/interrupts on a working kernel would help, too)

Thanks,

James Bottomley