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SubjectRe: NUMA aware slab allocator V2
On Fri, 13 May 2005, Andrew Morton wrote:

> It didn't produce anything interesting. For some reason the console output
> stops when start_kernel() runs console_init() (I guess it all comes out
> later) so the machine is running blind when we run kmem_cache_init().
> Irritating. I just moved the console_init() call to happen later on.
>
> It's going BUG() in kmem_cache_init()->set_up_list3s->is_node_online
> because for some reason the !CONFIG_NUMA ppc build has MAX_NUMNODES=16,
> even though there's only one node.

Yuck.

The definition for the number of NUMA nodes is dependent on
CONFIG_FLATMEM instead of CONFIG_NUMA in mm.
CONFIG_FLATMEM is not set on ppc64 because CONFIG_DISCONTIG is set! And
consequently nodes exist in a non NUMA config.

s/CONFIG_NUMA/CONFIG_FLATMEM/ ??

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