Re: [PATCH -v3] x86: Disable x2apic if nox2apic is specified

[Yinghai Lu]

On 10/28/2010 10:53 PM, Suresh Siddha wrote:
> On Tue, 2010-10-26 at 23:27 -0700, Yinghai Lu wrote:
>> For
>> 1. x2apic preenabled system
>> 2. first kernel have x2apic enabled, and try to kexec second kernel with "nox2apic"
>>
>> Will put back cpu with apic id < 255 into xapic mode, instead of panic.
>>
>> -v2: use x2apic_disabled instead of nox2apic, Suggested by Thomas
>>      update x2apic_supported with x2apic_disabled, Suggested by Thomas
>>
>> -v3: add checking for boot cpu apic id > 255. in that case will just panic
>>      --- pointed out by Suresh.
>>
> 
> Can we please hold off in merging this patch for a bit? There are some
> subtleties in going back to xapic when the platform/cpu's are in x2apic
> mode. I will check and get back to you on this after KS.

sure. take you time.

	Yinghai
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