Re: [PATCH] ACPI, cpu hotplug: move try_offline_node() after acpi_unmap_lsapic()

[Yasuaki Ishimatsu]

(2013/08/07 1:56), Toshi Kani wrote:
> On Tue, 2013-08-06 at 19:11 +0900, Yasuaki Ishimatsu wrote:
> > try_offline_node() checks that all cpus related with removed node have been
> > removed by using cpu_present_bits. If all cpus related with removed node have
> > been removed, try_offline_node() clears the node information.
> >
> > But try_offline_node() called from acpi_processor_remove() never clears
> > the node information. For disabling cpu_present_bits, acpi_unmap_lsapic()
> > need be called. But acpi_unmap_lsapic() is called after try_offline_node()
> > runs. So when try_offline_node() runs, the cpu's cpu_present_bits is always
> > set.
> >
> > This patch moves try_offline_node() after acpi_unmap_lsapic().
> >
> > Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
>
> The change looks good to me.
>
> Acked-by: Toshi Kani <toshi.kani@xxxxxx>

Thanks, Toshi!

> BTW, do you know why try_offline_node() has to use stop_machine()?

I don't know the reason.

Thanks,
Yasuaki Ishimatsu



> Thanks,
> -Toshi


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