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

[KOSAKI Motohiro]

> On Thu, 21 Apr 2011, KOSAKI Motohiro wrote:
> 
> > 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)
> > 
> 
> ia64 doesn't enable CONFIG_HIGHMEM, so it never gets set via this generic 
> code; mips also doesn't enable it for all configs even for 32-bit.
> 
> So we'll either want to take check_for_regular_memory() out from under 
> CONFIG_HIGHMEM and do it for all configs or teach slub to use 
> N_HIGH_MEMORY rather than N_NORMAL_MEMORY.

Hey, I already told this thing.

If CONFIG_HIGHMEM=n, N_HIGH_MEMORY and N_NORMAL_MEMORY are share the
same value. then, 
	node_set_state(nid, N_HIGH_MEMORY) in free_area_init_nodes()

mean set both N_HIGH_MEMORY and N_NORMAL_MEMORY.


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