Re: [PATCH v3] mm: make expand_downwards symmetrical to expand_upwards

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On Thu, 2011-04-21 at 22:16 +0900, KOSAKI Motohiro wrote:
> > This should fix the remaining architectures so they can use CONFIG_SLUB, 
> > but I hope it can be tested by the individual arch maintainers like you 
> > did for parisc.
> 
> ia64 and mips have CONFIG_ARCH_POPULATES_NODE_MAP and it initialize
> N_NORMAL_MEMORY automatically if my understand is correct.
> (plz see free_area_init_nodes)
> 
> I guess alpha and m32r have no active developrs. only m68k seems to be need
> fix and we have a chance to get a review... 

Actually, it's not quite a fix yet, I'm afraid.  I've just been
investigating why my main 4 way box got slower with kernel builds:
Apparently userspace processes are now all stuck on CPU0, so we're
obviously tripping over some NUMA scheduling stuff that's missing.

James


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