kdump
service: at the first boot, using the Kernel Dump Configuration graphical utility, and doing so manually on the command line.
Disable IOMMU on Intel chipsets
Intel IOMMU
driver can occasionally prevent the kdump
service from capturing the core dump image. To use kdump
on Intel architectures reliably, it is advised that the IOMMU support is disabled.
kdump
, navigate to the Kdump section and follow the instructions below.
Make sure the system has enough memory
kdump
crash recovery is enabled, the minimum memory requirements increase by the amount of memory reserved for it. This value is determined by the user, and defaults to 128 MB plus 64 MB for each TB of physical memory (that is, a total of 192 MB for a system with 1 TB of physical memory).
kdump
daemon to start at boot time, select the Enable kdump? checkbox. This will enable the service and start it for the current session. Similarly, unselecting the checkbox will disable it for and stop the service immediately.
kdump
kernel, click the up and down arrow buttons next to the Kdump Memory field to increase or decrease the value. Notice that the Usable System Memory field changes accordingly showing you the remaining memory that will be available to the system.