Re: x86: 4kstacks default

[Ingo Molnar]

* Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:

> > On Sun, 20 Apr 2008 11:50:53 -0700 Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote:
> > On Sun, 20 Apr 2008 20:19:30 +0200
> > Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:
> > 
> > > In theory if you e.g. convert a recursive algorithm
> > > to iterative you might save some cache foot print, but I don't
> > > think that really happens in kernel code.
> > > 
> > 
> > this is what Al did for the symlink recursion thing, and Jens did 
> > for the block layer... so yes this conversion does happen for real.
> 
> md got mostly-fixed too, via Neil's patch which sat in -mm for nearly 
> two years.

had we done the de-obfuscate-4K-stacks Kconfig change earlier it might 
have gotten upstream faster.

	Ingo
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