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Oracle Linux: Server with QLogic HBA Hangs with Many "kworker" Processes in "D-state" and High CPU Load Average (Doc ID 2635874.1)

Last updated on FEBRUARY 12, 2020

Applies to:

Linux OS - Version Oracle Linux 6.9 with Unbreakable Enterprise Kernel [3.8.13] and later
Information in this document applies to any platform.

Symptoms

Server running kernel 4.1.12-124.32.3.2.el6uek.X86_64 with Qlogic card using driver "qla2xxx" may experiences the following behavior when system is under heavy load of traffic over the Qlogic HBA:

 

Changes

When enable debugging on qla2xxx driver the system get more details on /var/log/messages:

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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