Multiple kernel error for "serial8250: too much work for irq4" are reported in log messages

Solution Verified - Updated -


  • Following error is reported in /var/log/messages in Hyper-V or KVM guest.
 "serial8250: too much work for irq4"  


  • Red Hat Enterprise Linux 7
    • Seen on Kernel-3.10.0-327.10.1.el7 / kernel-3.10.0-862.11.6.el7
  • Red Hat Enterprise Linux 8
  • Microsoft Hyper-V (Version: 7.0) / KVM

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