Re: Slab initialisation problems on MN10300

[David Howells <dhowells@redhat.com>]

Pekka Enberg <penberg@cs.helsinki.fi> wrote:

> would put struct arraycache_init to kmalloc-32 and struct kmem_list3
> to kmalloc-64. So are INDEX_AC and INDEX_L3 really equivalent? To
> which cache do they refer to?

(gdb) p sizeof(struct arraycache_init)
$1 = 20
(gdb) p sizeof(struct kmem_list3)
$2 = 52

However, the compiler has eliminated the test:

		if (INDEX_AC == INDEX_L3)

even though it's compiled with -O0.

This is odd.  I'll have to investigate the preprocessor output.

> And if this broke recently, you might want to try and see if commit
> 556a169dab38b5100df6f4a45b655dddd3db94c1 ("slab: fix bootstrap on
> memoryless node") is at fault here by reverting it.

Well, the MN10300 arch worked in -mm, but no longer works now that the patches
have been merged into Linus's tree.  Bisecting is probably not an option.

Thanks, anyway.  I've got something to investigate.

David

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