Re: [PATCH V2 0/3] powerpc/hotplug: Fix affinity assoc for LPAR migration

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

Hello:
    I would like to pull / defer further consideration of this patch set
for a while.  I will be discussing changes here with respect to the
LMB optimizations that Nathan Fontenot is working upon.
    A revision of this patch set will be sent out somewhat later.
Thanks for your attention and assistance.

Michael

On 11/16/2017 11:50 AM, Michael Bringmann wrote:
> The migration of LPARs across Power systems affects many attributes
> including that of the associativity of memory blocks and 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 memory and CPUs recorded
>   in internal data structures when compared to the latest copies in
>   the device tree (e.g. ibm,dynamic-memory, ibm,dynamic-memory-v2,
>   cpus),
> * Recognize changes to the associativity mapping (e.g. ibm,
>   associativity-lookup-arrays), locate all assigned memory blocks
>   corresponding to each changed row, and readd all such blocks.
> * Generate calls to other code layers to reset the data structures
>   related to associativity of the CPUs and memory.
> * Re-register the 'changed' entities into the target system.
>   Re-registration of CPUs and memory blocks 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>
> 
> Michael Bringmann (3):
>   hotplug/mobility: Apply assoc lookup updates for Post Migration Topo
>   postmigration/memory: Review assoc lookup array changes
>   postmigration/memory: Associativity & 'ibm,dynamic-memory-v2'
> ---
> Changes in V2:
>   -- Try to improve patch header documentation.
>   -- Remove unnecessary spacing changes from patch
> 

-- 
Michael W. Bringmann
Linux Technology Center
IBM Corporation
Tie-Line  363-5196
External: (512) 286-5196
Cell:       (512) 466-0650
mwb@linux.vnet.ibm.com