Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document.
Note: Even the most advanced machine translation cannot match the quality of professional translators.
Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Verifying the Kdump Configuration
Kdump is enabled by default, and the default setting is crashkernel=auto.
Verify the Kdump configuration as follows:
- Check whether the Kdump service is running.
- Run the following commands to make the Linux kernel break down:
- After the OS is restarted, check whether the address-YYYY-MM-DD-HH:MM:SS/vmcore file is generated in /var/crash/. If yes, the Kdump configuration is correct.
To manually adjust the reserved memory size, perform the following steps:
(The following describes how to set the size of crashkernel to 512 MB.)
- Run the vi /etc/default/grub command, set crashkernel to 512M, save the configuration, and exit.
- Synchronize the modification to grub.cfg.
UEFI mode: Run the grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg command.
- On the CLI, run the reboot command to restart the OS.
- Check the Kdump status after restart. If the following information is displayed, Kdump is enabled.
- Perform a Kdump test to ensure that the Kdump function is normal.
