Re: [patch] x86_64: fix cpu_to_node setup for sparse apic_ids

On Wed, Jul 27, 2005 at 06:24:45PM -0700, Andrew Morton wrote:
> Ravikiran G Thirumalai <[email protected]> wrote:
> >
> > While booting with SMT disabled in bios, when using acpi srat to setup
> > cpu_to_node[],  sparse apic_ids create problems.  Here's a fix for that.
> > 
> 
> Again, I don't have enough info here to judge the urgency of this patch.
> 
> What are the consequences and risks of not having this patch in 2.6.13, and
> to how many machines?
> 

Without this patch, intel x86_64 boxes with hyperthreading disabled in the
bios (and which rely on srat for numa setup) endup having incorrect 
values in cpu_to_node[] arrays, causing sched domains to be built 
incorrectly etc.

Thanks,
Kiran
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• References:
  • [patch] x86_64: fix cpu_to_node setup for sparse apic_ids
    • From: Ravikiran G Thirumalai <[email protected]>
  • Re: [patch] x86_64: fix cpu_to_node setup for sparse apic_ids
    • From: Andrew Morton <[email protected]>

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