Re: [patch 00/2] improve .text size on gcc 4.0 and newer compilers

On Thu, 5 Jan 2006, Linus Torvalds wrote:
> 
> The cache effects are likely the biggest ones, and no, I don't know how 
> much denser it will be in the cache. Especially with a 64-byte one.. 
> (although 128 bytes is fairly common too).

Oh, but validatign things like "likely()" and "unlikely()" branch hints 
might be a noticeably bigger issue. 

In user space, placement on the macro level is probably a bigger deal, but 
in the kernel we probably care mostly about just single cachelines and 
about branch prediction/placement.

		Linus
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