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Date:	Fri, 8 Aug 2014 10:56:12 +0200
From:	Geert Uytterhoeven <>
To:	Joonsoo Kim <>
Cc:	Andrew Morton <>,
	Christoph Lameter <>,
	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)

Hi Joonsoo,

On Fri, Aug 8, 2014 at 9:19 AM, Joonsoo Kim <> wrote:
> Could you show me your full dmesg on boot-up?
> What I want to know is nodes-cpus mapping.


If you want more debug output, please ask.

> I looked at SLAB code and found that SLAB works fine only if
> numa_mem_id() always returns 0. I guess that this is the case for
> !CONFIG_NUMA, so your system would work fine.
> And, I looked at SLUB code and found that SLUB works fine only if
> page_to_nid(page) always return 0 for this !CONFIG_NUMA and many nodes
> case. If not, some memory could be leak, I guess.

I've just tried SLUB, it boots fine. That doesn't say there are no leaks,

> Of possible, could you check whether page_to_nid(page) returns
> only 0 or not?

It returns 0 or 1.




Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds

Download attachment "dmesg" of type "application/octet-stream" (5535 bytes)

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