Re: [PATCH v9 0/8] Parallel CPU bringup for x86_64

[Oleksandr Natalenko]

On 21.02.2023 09:35, David Woodhouse wrote:
> On Tue, 2023-02-21 at 09:25 +0100, Oleksandr Natalenko wrote:
> > Right, sorry. Here it is: http://ix.io/4oLq
>
> $ echo `grep ^00000001 4oLq  | cut -c36-37`
> 00 02 04 06 08 0a 0c 0e 10 12 14 16 18 1a 1c 1e 01 03 05 07 09 0b 0d 0f
> 11 13 15 17 19 1b 1d 1f
>
> Well they look sane enough. All even APIC IDs and then all the odd ones
> is a topology that isn't massively surprising.
>
> Does it match what you get *before* suspend/resume?

Yes, the output is completely the same after a fresh boot and after a 
suspend/resume cycle.

> Obviously we could stick our fingers in our ears and go "la la la" and
> just disable it for non-X2APIC, for AMD without X2APIC, or perhaps
> disable it on *resume* but still use it at boot. But I'd really like to
> understand what's going on and not do voodoo. Thanks for helping!

--
  Oleksandr Natalenko (post-factum)