On Tue, Dec 05 2023 at 23:04, Andres Freund wrote: > On 2023-11-22 10:31:31 -0500, Sasha Levin wrote: >> Currently, the kernel enumerates the possible CPUs by parsing both ACPI >> MADT Local APIC entries and x2APIC entries. So CPUs with "valid" APIC IDs, >> even if they have duplicated APIC IDs in Local APIC and x2APIC, are always >> enumerated. > > As just described in > https://lore.kernel.org/all/20231206065850.hs7k554v6wym7gw5@xxxxxxxxxxxxxxxxxx/ > and also previously described by John Sperbeck > https://lore.kernel.org/all/20231122221947.781812-1-jsperbeck@xxxxxxxxxx/ > > this patch causes some machines to "loose" cpus. All but one in my > case. Sorry for the delay. > Even if the commit didn't have these unintended consequences, it seems like a > commit like this hardly is -stable material? Shit happens. We are all human, right?
