Re: [PATCH v08 0/5] powerpc/hotplug: Update affinity for migrated CPUs

[Michael Bringmann <mwb@linux.vnet.ibm.com>]

On 10/29/2018 02:51 PM, Michal Suchánek wrote:
> On Sun, 29 Jul 2018 08:18:34 -0500
> Michael Bringmann <mwb@linux.vnet.ibm.com> wrote:
> 
>> The migration of LPARs across Power systems affects many attributes
>> including that of the associativity of CPUs.  The patches in this
>> set execute when a system is coming up fresh upon a migration target.
>> They are intended to,
>>
>> * Recognize changes to the associativity of CPUs recorded in internal
>>   data structures when compared to the latest copies in the device
>> tree.
>> * Generate calls to other code layers to reset the data structures
>>   related to associativity of the CPUs.
>> * Re-register the 'changed' entities into the target system.
>>   Re-registration of CPUs mostly entails acting as if they have been
>>   newly hot-added into the target system.
>>
>> Signed-off-by: Michael Bringmann <mwb@linux.vnet.ibm.com>
>>
> Hello,
> 
> what is the status of this patchset other than it no longer applies?

The current PowerPC systems already perform remove_processor /
add_processor operations during migration events that subsume
the necessary affinity changes.  This patchset was overkill,
so we pulled it.

Memory affinity on the other hand does need intervention, and that
patchset has been posted.  I was just about to ping Michael Ellerman
about the status from his end.
 
> 
> Thanks
> 
> Michal

Thanks.
Michael

-- 
Michael W. Bringmann
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IBM Corporation
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