[WBEL-users] Re: Hyperthreading not enabled in WB kernels?

[Jamey Fletcher]

Vincent.Raffensberger@dtn.com wrote:

> Both SMP and ACPI HT need to be enabled.  I just checked the i686-smp 
> default config in the kernel source and it's not configured there. 
> I wonder why it was turned off and if it's the same way on the RH kernel. 
> If it were, I'd expect to see plenty of posts about it when searching...
> There "shouldn't" be any harm in enabling it and once enabled, you can 
> disable it with an append statement.

> I guess I'll just need to remember to build my own kernels if we end up 
> using WB.

I'm finding this very, very odd - because we just installed two 
dual-Xeon boxes tonight, straight from WBEL3.0 CDs, and they *both* have 
hyperthreading working...

# uname -a
Linux dynamic08.beau.org 2.4.21-4.ELsmp #1 SMP Sat Dec 13 19:21:55 CST 
2003 i686 i686 i386 GNU/Linux

Four processors showing.

The library's primary server:

# x86info
x86info v1.11.  Dave Jones 2001, 2002
Feedback to <davej@suse.de>.

Found 4 CPUs
CPU #1
/dev/cpu/0/cpuid: No such device
Family: 15 Model: 2 Stepping: 7 Type: 0
CPU Model: Pentium 4 Xeon (Northwood) [C1] Original OEM
Processor name string:                   Intel(R) Xeon(TM) CPU 2.40GHz

Number of logical processors supported within the physical package: 2

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Anyone else got any clues?  Odin, the primary server, is up2date, but 
the other two are not.