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SubjectRe: [PATCH 0/2] NR_CPUS: increase maximum NR_CPUS to 4096
Ingo Molnar wrote:
> * Mike Travis <travis@sgi.com> wrote:
>
>> Increases the limit of NR_CPUS to 4096 and introduces a boolean called
>> "MAXSMP" which when set (e.g. "allyesconfig") will set NR_CPUS = 4096
>> and NODES_SHIFT = 9 (512).
>>
>> I've been running this config (4k NR_CPUS, 512 Max Nodes) on an AMD
>> box with 2 dual-cores and 4gb memory. I've also successfully booted
>> it in a simulated 2cpus/1Gb environment.
>
> cool!
>
> this depends on the cpumask changes to work correctly (i.e. to boot at
> all), right?
>
> Ingo


Yes, it overflows the stack quite quickly without the cpumask changes.
I didn't do any testing to see what's the minimal set of changes.

Thanks,
Mike


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