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


On 21 February 2023 11:46:04 GMT, Oleksandr Natalenko <oleksandr@natalenko.name> wrote:
>On 21.02.2023 11:27, David Woodhouse wrote:
>> On 21 February 2023 09:49:51 GMT, Oleksandr Natalenko <oleksandr@natalenko.name> wrote:
>>> On 21.02.2023 10:06, David Woodhouse wrote:
>>>> Why does arch/x86/kernel/acpi/sleep.c::x86_acpi_suspend_lowlevel() set
>>>>
>>>> initial_gs = per_cpu_offset(smp_processor_id()) ?
>>>>
>>>> Would it not be CPU#0 that comes back up, and should it not get
>>>> per_cpu_offset(0) ?
>>>
>>> Wanna me try `initial_gs = per_cpu_offset(0);` too?
>>
>> Hm, yes please. There's another one to make zero on the next line up, I think?
>
>So,
>
>```
>early_gdt_descr.address = (unsigned long)get_cpu_gdt_rw(0);
>initial_gs = per_cpu_offset(0);
>```
>
>?
>
>Should I leave `smpboot_control = 0;` commented out, or I should uncomment it back?

Put it back, else those things don't matter. Thanks.

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