How should the crashkernel parameter be configured for using kdump on RHEL7?
Issue
- When configuring the
crashkernelparameter thekdumpservice fails to start:
$ systemctl start kdump
Job for kdump.service failed. See 'systemctl status kdump.service' and 'journalctl -xn' for details.
$ systemctl status kdump.service
kdump.service - Crash recovery kernel arming
Loaded: loaded (/usr/lib/systemd/system/kdump.service; enabled)
Active: failed (Result: exit-code) since Wed 2014-06-11 10:34:48 CEST; 3min 10s ago
Process: 2259 ExecStart=/usr/bin/kdumpctl start (code=exited, status=1/FAILURE)
Main PID: 2259 (code=exited, status=1/FAILURE)
Jun 11 10:34:47 rhel7 systemd[1]: Starting Crash recovery kernel arming...
Jun 11 10:34:48 rhel7 kdumpctl[2259]: No memory reserved for crash kernel.
Jun 11 10:34:48 rhel7 kdumpctl[2259]: Starting kdump: [FAILED]
Jun 11 10:34:48 rhel7 systemd[1]: kdump.service: main process exited, code=exited, status=1/FAILURE
Jun 11 10:34:48 rhel7 systemd[1]: Failed to start Crash recovery kernel arming.
Jun 11 10:34:48 rhel7 systemd[1]: Unit kdump.service entered failed state.
- What is the correct crashkernel parameter for
kdumpto work? - "crashkernel reservation failed - memory is in use" errors when kernel panics
Environment
- Red Hat Enterprise Linux (RHEL) 7
- x86_64 architecture
- kdump
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.
Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.
