Hi,
Linux uses FLAT MODEL for setting up the IO APIC for SMP machines (Intel IA-32
arch). I was wondering if the CLUSTER MODEL has been implemented in any of
later SMP kernels?
Thanks
Aravindh
On Nov 08, 2001 16:28 -0500, aputhiya wrote:
> Linux uses FLAT MODEL for setting up the IO APIC for SMP machines (Intel
> IA-32 arch). I was wondering if the CLUSTER MODEL has been implemented
> in any of later SMP kernels?
Yes, the IBM folks implemented this for CONFIG_MULITQUAD. I don't know
the details, but it is in stock 2.4.13+ kernels at least.
Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://www-mddsp.enel.ucalgary.ca/People/adilger/
>> Linux uses FLAT MODEL for setting up the IO APIC for SMP machines (Intel
>> IA-32 arch). I was wondering if the CLUSTER MODEL has been implemented
>> in any of later SMP kernels?
>
> Yes, the IBM folks implemented this for CONFIG_MULITQUAD. I don't know
> the details, but it is in stock 2.4.13+ kernels at least.
Look for things switched on clustered_apic_mode - some of it is
specific to IBM NUMA-Q (and should probably be switched on
something else that's also triggered by CONFIG_MULTIQUAD),
but most of it is switching to clustered APIC mode.
If you have another machine that uses this mode, feel free to
mail me any questions you have about what I did.
Martin.