IBM Support

Possibility of system crash when DLPAR removing memory after partition migration or Dynamic Platform Optimization

Flashes (Alerts)


Abstract

When performing a memory DLPAR remove operations after a partition migration or a Dynamic Platform Optimization event there is a possibility of a system crash due to an improper mapping of memory and the node it resides in.

Content

Linux Releases Affected
SUSE Linux Enterprise Server 12

SUSE Linux Enterprise Server 12, Service Pack 1

SUSE Linux Enterprise Server 12, Service Pack 2

SUSE Linux Enterprise Server 12, Service Pack 3

SUSE Linux Enterprise Server 15


IBM Systems Affected
All POWER 8 and POWER 9 systems

Symptoms

After performing a partition migration or a Dynamic Platform Optimization event, the memory block to node mapping may be incorrect which can lead to a system crash when trying to perform a memory DLPAR remove operation.

Workaround

  • Do not perform memory DLPAR remove operations after a partition migration or a Dynamic Platform Optimization event.

  • After performing a partition migration or a Dynamic Platform Optimization PRRN event, the system can be rebooted to avoid a possibility of incorrect memory block to node mappings that could lead to a system crash when performing memory DLPAR remove operations..

Fix Outlook

Fix has been integrated into the following releases/service streams:
SUSE Linux Enterprise Server 12 Service Pack 4, kernel version 4.12.14-95.6.1
SUSE Linux Enterprise Server 15, kernel version 4.12.14-25.28.1
SUSE bug number 1108270.

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Document Information

Modified date:
26 September 2022

UID

ibm10732199

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