[RFC 0/3] powerpc/hotplug: Fix affinity assoc for LPAR migration
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 BringmannMichael 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 RFC: -- Rename pseries_update_drconf_cpu to pseries_update_cpu -- 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, or dlpar_memory_readd_by_index. -- Move check for "cpu" node type from pseries_update_cpu to pseries_smp_notifier in 'hotplug-cpu.c' -- Remove functions 'pseries_memory_readd_by_index' and 'pseries_cpu_readd_by_index' as no longer needed outside of 'mobility.c'. -- Update patch for recent checkin compatibility -- Resubmit as RFC pending further integration with LMB changes by Nathan Fontenot
[RFC 0/3] powerpc/hotplug: Fix affinity assoc for LPAR migration
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 BringmannMichael 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 RFC: -- Rename pseries_update_drconf_cpu to pseries_update_cpu -- 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, or dlpar_memory_readd_by_index. -- Move check for "cpu" node type from pseries_update_cpu to pseries_smp_notifier in 'hotplug-cpu.c' -- Remove functions 'pseries_memory_readd_by_index' and 'pseries_cpu_readd_by_index' as no longer needed outside of 'mobility.c'. -- Update patch for recent checkin compatibility -- Resubmit as RFC pending further integration with LMB changes by Nathan Fontenot