Re: [git pull] cpus4096 fixes

[Linus Torvalds]

On Sun, 27 Jul 2008, Al Viro wrote:
> 
> ITYM "one 32.5kB array" -
> (u64[65][64]){[1][0] = 1, [2][0] = 2, [3][0] = 4, ..., [64][0] = 1ULL<<63}
> would work just fine.  You were saying...?

Yeah, you can optimize it even more, I agree. But even the _trivial_ one 
gets you to linear memory use (rather than something that is O(n^2) in 
number of CPU's) and makes the thing a non-issue. But yes, there's another 
almost-factor-of-two that you can get by being clever.

But in fact, I think your optimization would not just use less memory, but 
yes, it's also easier to write the initializer for (with just a couple of 
levels of macros to avoid having to do 64 entries by hand).

So yes, make it so. Please.

		Linus


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