17.2. Minimum threshold for automatic memory reservation

By default, the kdump-utils utility configures the crashkernel command line parameter and reserves a certain amount of memory for kdump. On some systems however, it is still possible to assign memory for kdump either by using the crashkernel parameter in the boot loader configuration file, or by enabling this option in the graphical configuration utility. For this automatic reservation to work, a certain amount of total memory needs to be available in the system. The memory requirement varies based on the system’s architecture. If the system memory is less than the specified threshold value, you must configure the memory manually.