Re: [PATCH] x86: Allow NR_CPUS=1024

[Ingo Molnar]

* Josh Boyer <jwboyer@xxxxxxxxxx> wrote:

> > Why touch MAXSMP at all? It's really just a shortcut for 'configure 
> > the kernel silly large', via a single option, nothing else. You are 
> > not forced to use it and it should not affect configurability of 
> > NR_CPUS.
> >
> > What we _really_ want here is to fix NR_CPUS setting: to extend its 
> > range and to enforce that NR_CPUS cannot be set larger than 512 
> > without setting CONFIG_CPUMASK_OFFSTACK.
> 
> OK.  I was just thinking that if we've come to the conclusion that 4096 
> CPUs isn't silly large anymore, we should make MAXSMP be something we 
> consider silly large. [...]

MAXSMP is also supposed to track the real hardware max as well on x86 - 
i.e. we should only increase it to 8192 etc. if such hardware exists.

Thanks,

	Ingo
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