Re: [PATCH] x86-32: Allocate irq stacks seperate from percpu area

[Tejun Heo]

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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