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Date:	Fri, 8 Aug 2014 09:11:12 -0500 (CDT)
From:	Christoph Lameter <>
To:	Geert Uytterhoeven <>
cc:	Joonsoo Kim <>,
	Andrew Morton <>,
	Pekka Enberg <>,
	David Rientjes <>,
	Linux MM <>,
	"" <>,
	Vladimir Davydov <>
Subject: Re: BUG: enable_cpucache failed for radix_tree_node, error 12 (was:
 Re: [PATCH v3 9/9] slab: remove BAD_ALIEN_MAGIC)

On Fri, 8 Aug 2014, Geert Uytterhoeven wrote:

> > Ok this is broken on m68k. CONFIG_NUMA is required for this to work. If
> > the arch code does this despite !CONFIG_NUMA then lots of things should
> > break.
> Can you please elaborate? We've been using for years...

!CONFIG_NUMA leads to the assumption of a system with a single node in
numerous places.

F.e. in include/linux/mm.h:

static inline int zone_to_nid(struct zone *zone)
        return zone->node;
        return 0;

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