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xen-devel
RE: [Xen-devel] [PATCH]x86:x2apic: Disable x2apic on x86-32 permanently
>>> On 09.02.11 at 07:57, "Wei, Gang" <gang.wei@xxxxxxxxx> wrote:
> Jan Beulich wrote on 2011-01-31:
>> How does this (namely the x2apic_enabled part) play together with the
>> selection of the APIC driver, which in this case would have happened
>> quite a bit earlier (from generic_apic_probe())?
>>
>> I would therefore think that this change really belongs into
>> check_x2apic_preenabled().
>
> It is really a problem. But I do think we shall simply remove below line
> from check_x2apic_preenabled() fn:
>
> genapic = apic_x2apic_probe();
>
> The same line exists in x2apic_bsp_setup() fn.
No, that would be exactly the wrong way round - we need
genapic to be set early in case x2apic was pre-enabled (see
-unstable c/s 22707).
Jan
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