Re: Panic starting 6.2.x and later 6.1.x kernels

[David R]

On 29/03/2023 20:17, Limonciello, Mario wrote:
> On 3/29/2023 14:14, David R wrote:
> > I note that 6.2.8 still has:
> >
> > static bool __init acpi_is_processor_usable(u32 lapic_flags)
> > {
> >          if (lapic_flags & ACPI_MADT_ENABLED)
> >                  return true;
> >
> >          if (acpi_support_online_capable && (lapic_flags & 
> > ACPI_MADT_ONLINE_CAPABLE))
> >                  return true;
> >
> >          return false;
> > }
> >
> > The flag getting set to false won't help unless the patch I tried 
> > previously is applied ?
> >
> > diff 
> > <https://lore.kernel.org/all/20230327191026.3454-2-eric.devolder@xxxxxxxxxx/#iZ31arch:x86:kernel:acpi:boot.c> 
> > --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c 
> > index 1c38174b5f01..7b5b8ed018b0 100644 --- 
> > a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ 
> > -193,7 +193,13 @@ static bool __init acpi_is_processor_usable(u32 
> > lapic_flags)       if (lapic_flags & ACPI_MADT_ENABLED)
> >           return true;
> >   - if (acpi_support_online_capable && (lapic_flags & 
> > ACPI_MADT_ONLINE_CAPABLE)) + /* + * Prior to MADT.revision 5, the 
> > presence of the Local x2/APIC + * structure _implicitly_ noted a 
> > possible hotpluggable cpu. + * Starting with MADT.revision 5, the 
> > Online Capable bit + * _explicitly_ indicates a hotpluggable cpu. + 
> > */ + if (!acpi_support_online_capable || (lapic_flags & 
> > ACPI_MADT_ONLINE_CAPABLE))           return true;
> >         return false;
> > --
>
> You mean specifically this change:
> https://lore.kernel.org/all/20230327191026.3454-2-eric.devolder@xxxxxxxxxx/ 
>
>
> Yes; I suppose that still makes sense.
Yes, that's the one.

But the fact that  that one worked own its own implies that my system 
never had the flag set in the first place?

David