RE: IBM EM64T blades and SMP kernel panics

>-----Original Message-----
>From: [email protected]=20
>[mailto:[email protected]] On Behalf Of=20
>Arjan van de Ven
>Sent: Tuesday, November 02, 2004 4:35 PM
>To: Discussion of Red Hat Enterprise Linux 3 (Taroon) Beta
>Subject: Re: IBM EM64T blades and SMP kernel panics
>
>
>On Tue, 2004-11-02 at 13:39 -0500, Vanco, Don wrote:
>> Does anyone here know anything about IBM HS20 blades based=20
>on EM64T not
>> being able to boot an SMP kernel?  I've tried both U2 and=20
>U2, as well as
>> building my own ultra-stripped kernel and they panic=20
>instantly.  I can't
>> get anything from IBM, the only info that I've found is=20
>something about
>> a change in FSB (from 533 to 800) that caused some issues.
>>=20
>> I can boot the UP (ia32e) kernel as long as I supply acpi=3Doff -
>> otherwise that horks as well.
>
>what do you mean with the "SMP" kernel?
>the ia32e kernel *IS* SMP.
>there is no kernel-smp for ia32e!
>
>(and do not use the x86-64 kernels, they are for amd64 machines which
>have a slightly different instruction set)
	This is what is confusing me to no end.  The blade I installed
has both the (guessing from memory) 2.4.21-20EL (ia32e) and
2.4.21-20EL-smp (AMD64) kernels installed.  I was poking aboot in both
of the config files for each and was puzzled to see that they both had
SMP enabled but supported different architectures.  The presence of the
kernel-smp package is likely due to a kickstart script improperly
applied to this architecture (I will have to look)

	Ignoring the fact that the AMD kernel doesn't belong on the box,
the "standard" ia32e kernel, while enabled for SMP and hyperthreading,
neither shows more than one physical CPU or at least 2 via
hyperthreading (according to /proc) - in a box with dual CPUs present
and hyperthreading enabled in BIOS.  x86 distros boot and show 2 CPUs
(RHEL-AS3_x86 and the IBM ISOLINUX RAID utility CD)
	I have since learned that I have the "old" 533FSB blades that
IBM no longer / never really supported - according to IBM I need to get
the 800MHz blades.  Still, this behavior is puzzling.....
Don

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