Symptoms

PowerStore Pre-Upgrade Health Check (PUHC) and System Health Check (SHC) may detect this issue when run on the following PowerStoreOS releases: PowerStoreOS 3.xPowerStoreOS 4.0.x NOTICEThe issue detected by these checks is resolved in PowerStoreOS version 4.0.1.2 (or later) and 3.6.1.5 (or later 3.6.x versions). Therefore, this PUHC is set to detect this issue only when upgrading from versions 3.0.0 through 3.6.1.4, and from versions 4.0.0 through 4.0.1.1. Scenario 1:The following message may be observed prior to an upgrade from PowerStoreOS versions 3.0.0 through 3.6.1.4, and from versions 4.0.0 through 4.0.1.1 when running PUHC: The available system memory or skbuff_fclone_cache is below threshold (KB 000261124). Please contact your service provider. (off_release_check_kernel_slab_memory_failed) Scenario 2:The following message may be observed on a PowerStoreOS 3.x or 4.0.x cluster when running SHC: Kernel memory allocation is over the limit. (KB 000261124) If the System Health Check (SHC) test is run from the Command-Line Interface (CLI), the following may be displayed: [BSC:cyc@ABCDEFG-A cyc]$ svc_health_check run -rhc kernel_slab_check /usr/lib/python2.7/site-packages/requests/__init__.py:91: RequestsDependencyWarning: urllib3 (1.26.18) or chardet (3.0.4) doesn't match a supported version! RequestsDependencyWarning) Name Location Status Description OS kernel memory allocation check node_a Failed Kernel memory allocation is over the limit. (KB 000261124) OS kernel memory allocation check node_b Passed SUMMARY Status: Failed Passed: 1 Failed: 1 Total: 2 [BSC:cyc@ABCDEFG-A cyc]$ [BSC:cyc@ABCDEFG-B ~]$ svc_health_check run -rhc kernel_slab_check /usr/lib/python2.7/site-packages/requests/__init__.py:91: RequestsDependencyWarning: urllib3 (1.26.18) or chardet (3.0.4) doesn't match a supported version! RequestsDependencyWarning) Name Location Status Description OS kernel memory allocation check node_a Failed Kernel memory allocation is over the limit. (KB#000261124) OS kernel memory allocation check node_b Passed SUMMARY Status: Failed Passed: 1 Failed: 1 Total: 2 Results may vary based on the node where the check failed. These health checks are off-release PUHC and SHC checks that are contained in the Health Check thin package. This package can be downloaded from the Dell Drivers & Downloads site.See the Additional Info section for information about the Health Check thin package.

Cause

A node may encounter a kernel panic due to an Out-Of-Memory (OOM) condition. This issue is due to high memory consumption of skbuff_fclone_cache from SLAB.

Resolution

To resolve this issue, contact Dell Technical Support for assistance. Mention this article for expedited attention and resolution.

Support Cases