Re: smpboot seems to be confused on dual EPYC system

Gabriel C
2018-05-27T22:51:49Z

2018-05-27 23:22 GMT+02:00 Gabriel C <nix.or.die@gmail.com>:
>
> 2018-05-27 22:07 GMT+02:00 Borislav Petkov <bp@alien8.de>:
>>
>> On Sun, May 20, 2018 at 03:23:32PM +0200, Gabriel C wrote:
>> > Hello,
>> >
>> > I have an H11DSi-NT board with 2 * EPYC 7281 16C/32T CPUs.
>> >
>> > On that box for some reason spmboot things '4' logical packages
>> > are possible.
>>
>> First of all, which kernel?
>
>

Here one box with single socket with an AMD EPYC 7551P
on H11SSL-NC mobo running kernel 4.16.10:

...
[ 0.000000] smpboot: Allowing 128 CPUs, 64 hotplug CPUs
[ 0.030000] smpboot: CPU0: AMD EPYC 7551P 32-Core Processor
(family: 0x17, model: 0x1, stepping: 0x2)
[ 0.545084] smpboot: Max logical packages: 2
[ 0.545084] smpboot: Total of 64 processors activated (255989.37 BogoMIPS)
...

128CPUs for sure not possible and for sure no way to have '2' CPUs installed.