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DateWed, 27 Oct 2010 17:40:09 +0200
FromTejun Heo <>
SubjectRe: [PATCH] x86-32: Allocate irq stacks seperate from percpu area
Hello, Ingo, Linus.

On 10/27/2010 05:33 PM, Ingo Molnar wrote:
> Btw., the NUMA stuff never really worked percpu alloc, as per Eric's observation:

Oh, it works in general. In this case, it's probably because the NUMA
configuration is rather weird in 32bit (but then again NUMA on 32bit
is supposed to be so). I think it's just 32bit init code setting up
early_cpu_to_node() differently.

> | Anyway, I just discovered per_cpu data on my machine (NUMA capable) all sit on a
> | single node, if 32bit kernel used.
>
> ... and in practice it's not really relevant on 32-bit anyway. So we can decouple
> the two issues just fine.

Yeah, the two issues are separate and as I wrote in the other message
the end result is correct (as much as it could be). I'll try to dig
down what exactly is going on but I don't think there's anything to be
alarmed about.

Thanks.

--
tejun


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