Re: [PATCH] include: kernel.h: rewrite min3, max3 and clamp using min and max

[Steven Rostedt]

On Mon, 16 Jun 2014 16:54:32 -0700 (PDT)
David Rientjes <rientjes@xxxxxxxxxx> wrote:

> 
> 
> On linux-next, allyesconfig has a 0.0001% savings as a result of the 
> patch, but I'd be worried about the extra temp variable it allocates on 
> the stack that is evident in the mm/slab.c disassembly unless all cases 
> can be audited to show that we're not potentially deep.

A 0.0001% change means it's not worth changing, and we may be able to
mark this up as a fluke in Michal's results.

I'll give it a try on my 4.6.3 compiler.

-- Steve

> 
>    text	   data	    bss	    dec	    hex	filename
> 108573045	23488016	51580928	183641989	af22785	vmlinux.before
> 108572908	23488016	51580928	183641852	af226fc	vmlinux.after

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