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

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

[Michael Bringmann]

On 8/21/18 10:33 AM, 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>

Retract this series in preference to
 [PATCH] powerpc/pseries: Perform full re-add of CPU for topology update post-migration

Michael

> 
> Michael Bringmann (5):
>   hotplug/cpu: Conditionally acquire/release DRC index
>   hotplug/cpu: Add operation queuing function
>   hotplug/cpu: Provide CPU readd operation
>   mobility/numa: Ensure numa update does not overlap
>   hotplug/pmt: Update topology after PMT
> ---
> Changes in patch:
>   -- Restructure and rearrange content of patches to co-locate
>      similar or related modifications
>   -- Rename pseries_update_drconf_cpu to pseries_update_processor
>   -- Simplify code to update CPU nodes during mobility checks.
>      Remove functions to generate extra HP_ELOG messages in favor
>      of direct function calls to dlpar_cpu_readd_by_index.
>   -- Revise code order in dlpar_cpu_readd_by_index() to present
>      more appropriate error codes from underlying layers of the
>      implementation.
>   -- Add hotplug device lock around all property updates
>   -- Add call to rebuild_sched_domains in case of changes
>   -- Various code cleanups and compaction
>   -- Rebase to 4.18 kernel
>   -- Change operation to run CPU readd after end of migration store.
>   -- Improve descriptive text
>   -- Cleanup patch reference to outdated function
>   -- Code cleanup a 'acquire_drc' check in dlpar_cpu_add.
>   -- Code cleanup a 'release_drc' check in dlpar_cpu_remove.
>   -- Add more information to patch descriptions.
>   -- More code cleanup
>   -- Rearrange call to rebuild_sched_domains to allow removal
>      of some locking code.
> 

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