Red Hat Enterprise MRG realtime kernel is unresponsive - qla2xxx driver logs 'Mailbox cmd timeout'

Solution Verified - Updated -

Issue

  • We see qla2xxx 'Mailbox cmd timeout' in the messages. Some time after this the system will hang.
  • Since the update from RHEL6.3 to 6.5 with MRG-RT 2.4 we got intermittent qla2xxx failures on HP BL460c G6 systems.
  • Shortly after those often the system will hang.
  • Systems with realtime kernels of Red Hat Enterprise MRG become unresponsive/hung due to a deadlock of certain kernel threads as outlined under Root Cause.
  • The qla2xxx driver may log 'Mailbox cmd timeout' messages in connection with this deadlock.

Environment

  • Red Hat Enterprise Linux (RHEL) 6 with realtime kernel
  • MRG-RT 2.4
  • realtime kernel 3.8.13-rt14.26.el6rt.x86_64
  • realtime kernel 3.8.13-rt27.33.el6rt.x86_64

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content