Messages in this thread | | | Date | Tue, 21 Feb 2023 12:42:36 +0100 | From | Oleksandr Natalenko <> | Subject | Re: [External] Re: [PATCH v9 0/8] Parallel CPU bringup for x86_64 |
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On 21.02.2023 11:47, Usama Arif wrote: > On 21/02/2023 10:27, 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? >> > > I think it might be smp_processor_id() and not 0 incase CPU0 was > offline at the point the system was suspended?
Is it even possible for CPU 0 to be offline, at least on x86?
-- Oleksandr Natalenko (post-factum)
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