Folks,
another datapoint - see below
> On Thu, 29 Jan 2004 16:19:57 +0000
> "Eugene de Villiers" <edevilliers(a)hotmail.com> wrote:
>
> [cc'ing back to suse-amd. Please keep discussions there]
>
>
> > >Do a head -30 /var/log/boot.msg
> > >
> > dm(229) head -30 /var/log/boot.msg
> > Inspecting /boot/System.map-2.4.21-193-smp
> > Loaded 14927 symbols from /boot/System.map-2.4.21-193-smp.
> > Symbols match kernel version 2.4.21.
> > Loaded 117 symbols from 5 modules.
> > klogd 1.4.1, log source = ksyslog started.
> > ok
> > <4>Bootdata ok (command line is root=/dev/sda2 vga=0x31a desktop
> > splash=silent)
> > <4>Linux version 2.4.21-193-smp (root(a)x86_64.suse.de) (gcc
> version 3.3.1
> > (SuSE Linux)) #1 SMP Wed Jan 21 18:41:44 UTC 2004
> > <6>BIOS-provided physical RAM map:
> > <4> BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
> > <4> BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
> > <4> BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
> > <4> BIOS-e820: 0000000000100000 - 000000009fff0000 (usable)
> > <4> BIOS-e820: 000000009fff0000 - 000000009ffff000 (ACPI data)
> > <4> BIOS-e820: 000000009ffff000 - 00000000a0000000 (ACPI NVS)
> > <4> BIOS-e820: 00000000ff7c0000 - 0000000100000000 (reserved)
> > <4>kernel direct mapping tables upto 10100000000 @ 8000-d000
> > <6>Scanning NUMA topology in Northbridge 24
> > <3>Node 0 using interleaving mode 1/0
> > <6>No NUMA configuration found
> > <6>Faking a node at 0000000000000000-000000009fff0000
I have seen the above 2 lines where for some reason the BIOS could use a DIMM (in my case I reckon it is a faulty DIMM slot). If that CPU has no usuable DIMMs I get the above message.
In my case I solved it by moving the 2 DIMMs up from slots 0/1 to slots 2/3 on that CPU.
> > <4>Bootmem setup node 0 0000000000000000-000000009fff0000
> > <7>ACPI: have wakeup address 0x10000002000
> > <4>Scan SMP from 0000010000000000 for 1024 bytes.
> > <4>Scan SMP from 000001000009fc00 for 1024 bytes.
> > <4>Scan SMP from 00000100000f0000 for 65536 bytes.
> > <6>found SMP MP-table at 00000000000ff780
> > <4>hm, page 000ff000 reserved twice.
> > <4>hm, page 00100000 reserved twice.
> > <4>hm, page 000f9000 reserved twice.
> >
> > Hmm, very strange, no sizes reported.
> > Why is it using SMP and not NUMA for memory sharing? Is
> there a NUMA version
> > of the 193 kernel I could use?
>
> The kernel is NUMA. It cannot access the northbridge of the
> second CPU,
> so NUMA support is turned off. That's some hardware problem
> at your side,
> maybe the second CPU or the motherboard are broken or not
> correctly plugged in.
>
> -Andi
>
>
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