[Bug 260805] sysctl: kern.sched.topology_spec shows bogus NUMA domains

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 04 Jan 2022 13:13:48 UTC

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
                 CC|                            |mav@FreeBSD.org

--- Comment #3 from Konstantin Belousov <kib@FreeBSD.org> ---
I suspect that the original issue is the inconsistency between cpuid and cpu
id.  They were simply different namespaces until some time on head, where mav@
fixed it in
c8077ccd70cfcbccc 'acpi_cpu: Make device unit numbers match OS CPU IDs.'
In other words, dev.cpu.N and CPUID N did not have any connection.

You might try to take c8077ccd70cfcbccc and perhaps d3a8f98acbf51e72841.
I am not even sure that it is possible to match acpi/dev id with CPUID in
userspace.  Relevant data is saved in pcpu but it seems we do not export
it from kernel.

IMO mav@' commits should be merged to stable/13.

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