kdump setup on IBM POWER9

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Environment

SUSE Linux Enterprise Server 11 Service Pack 4 (SLES 11 SP4)

Situation

Due to the nature of the kdump environment, it is possible that an IBM POWER9 machine will hang or fail to reboot after a crash, and the vmcore may not be captured.

Resolution

To avoid these kinds of problems, the following setup steps are suggested:

1. Edit /etc/sysconfig/kdump file and set KDUMP_COMMANDLINE_APPEND to

"maxcpus=1 noirqdistrib irqpoll"

2. Restart kdump service to pick up the changes:

$ service boot.kdump restart

Disclaimer

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