IBM Support

Live migration of Linux LPARs on POWER9 systems might result in LPAR crashes

Flashes (Alerts)


Abstract

Occasional logical partition (LPAR) crashes are observed while performing live partition migration (LPM) for Linux partitions on IBM POWER9 systems when the LPAR is under heavy load.

Content

Linux Releases Affected
SUSE Linux Enterprise Server 12, Service Pack 3
SUSE Linux Enterprise Server 12, Service Pack 4
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server 15, Service Pack 1
Red Hat Enterprise Linux Server 7.6
Red Hat Enterprise Linux Server 7.6 for POWER9
Red Hat Enterprise Linux Server 7.7
Red Hat Enterprise Linux Server 7.8
Red Hat Enterprise Linux Server 8.0
Red Hat Enterprise Linux Server 8.1

IBM Systems Affected
All POWER9 systems

Symptoms
While performing a live partition migration of a running LPAR on a POWER9 system, the LPAR might crash.

Workaround
No workaround exists for this issue.

Fix Outlook

The issue of LPAR crash is fixed in the following releases:
SUSE Linux Enterprise Server 12, Service Pack 5, kernel version 4.12.14-122.17.1
SUSE Linux Enterprise Server 15 Service Pack 1, kernel version 4.12.14-197.34.1
IBM is working closely with Red Hat to release a fix for this issue. The fix should come as part of a future RHEL maintenance release. Open a support ticket with Red Hat if a hotfix is needed before the next Red Hat maintenance release.

SUSE bug numbers:
SLES 12 SUSE Bugzilla 1115440, 1115575, 1115709, 1133584
SLES 15 SUSE Bugzilla 1115431
Red Hat bug numbers:
RHEL 7.6 Bugzilla 1650249, 1705431
RHEL 7.6-alt Bugzilla 1640500
RHEL 8.0 Bugzilla 1708102, 1668254, 1671474, 1705465

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Document Information

Modified date:
26 September 2022

UID

ibm10740469

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