Warning "Your kernel is old, please use maxcpus=1 instead of nr_cpus=1" trying to start kdump

Solution Verified - Updated -

Issue

The following warning message is printed and is put in the system log when trying to start 'kdump' service:

[root@serv ~]# service kdump restart
Stopping kdump:                                            [  OK  ]
Rebuilding /boot/initrd-2.6.32-131.0.15.el6.x86_64kdump.img
Your kernel is old, please use maxcpus=1 instead of nr_cpus[WARNING]
Starting kdump:                                            [  OK  ]

Environment

  • Red Hat Enterprise Linux 6
  • Kernel earlier than 2.6.32-171

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