Re: Explanation re NBUS in smp config

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From
Remy Nonnenmacher <remy@synx.com>
Date
19 Nov 1999 03:13:34
Subject
Re: Explanation re NBUS in smp config
Message-ID
199911191107.MAA42366@gw0.boostworks.com

In reply to

[ Hide this part ]
On 19 Nov, Yusuf Goolamabbas wrote:
> Hi, I was installing 3.3-RELEASE on an Intel 2U Rack Server platform
> today with 2 P-3 500's.
>
> http://www.intel.com/support/motherboards/server/lb440gx/index.htm
>
> It installed cleanly and I modified the kernel to allow for SMP by
> uncommenting these two lines in GENERIC
> options SMP # Symmetric MultiProcessor Kernel
> options APIC_IO # Symmetric (APIC) I/O
>
> Did the usual config,make depend;make ;make install and
> reboot. However on reboot, the system said that it couldn't boot since
> NBUSSES should be 5 instead of 4. I have compiled FreeBSD on many dual
> CPU configs (albeit for the first time on this specific rack server
> model) and have never to modify NBUS from its default of 4 to 5
>
> Can somebody explain what buses are referred to in NBUS ?
>
> The system boot cleanly when I recompiled the kernel with NBUS=5
>
> Regards, Yusuf

Same thing here. The LB400GX uses an active PCI riser (with a PCI
bridge). Maybe it's time to go NBUS=6 by default since 2U boxes will use
more and more PCI busses.

Someone to commit this ?

Thanks.

RN.
IaM




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