rhel8: high printk value sometimes hangs a VMware guest system

Solution Unverified - Updated -

Issue

Regarding the contents of the RHEL 8.5 release notes, please tell me the details of the "JIRA: RHELPLAN-28940" shown in the following URL.

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.5_release_notes/known-issues#known-issue_hardware-enablement

Customers may interact with the web console through VMware vCenter. If the connection is not a serial console connection (such as a VMware vCenter web console or an ssh connection), this issue does not apply. Is this correct?

So this is just an issue if the serial console for guests can not be disabled. What exactly does "if the serial console is active" mean?

  1. Detaching Serial Port Devices from vmware guests?
  2. Removing the "serial" and "console" options from kernel parameters?

Environment

  • Red Hat Enterprise Linux (RHEL) 8
  • VMware guests
  • serial console

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