CPU heavy loading due to background kworker threads when running third party HPE/Marvell qla2xxx driver

Solution In Progress - Updated -

Issue

  • CPU loading heavy due to background process kworker
  • Performance issues when running out of box qla2xxx driver from HPE (Marvell).
  • Lots of kworker processes running causing cpu load to peak to 100% system time.
  • Application performance adversely affected

Environment

  • Red Hat Enterprise Linux 7

  • HPE qla2xxx driver (out of box/unsupported driver)

    • rpm kmod-qlgc-qla2xxx-10.02.01.00.a14_k1-1.rhel7u9.x86_64 or similar present

    • modinfo shows out of box qla2xxx driver present via weak update installation

      filename:       /lib/modules/3.10.0-1160*el7.x86_64/weak-updates/qlgc-qla2xxx/qla2xxx.ko
version:        10.02.01.00.a14-k1

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