What Is Kernel Dump in Linux?

kdump is a feature of the Linux kernel that creates crash dumps in the event of a kernel crash. When triggered, kdump exports a memory image (also known as vmcore) that can be analyzed for the purposes of debugging and determining the cause of a crash.

What is kernel dump?

A Kernel Memory Dump contains all the memory in use by the kernel at the time of the crash. This kind of dump file is significantly smaller than the Complete Memory Dump. Typically, the dump file will be around one-third the size of the physical memory on the system.

How do I make a kernel dump?

Enable memory dump setting

1. In Control Panel, select System and Security > System.
2. Select Advanced system settings, and then select the Advanced tab.
3. In the Startup and Recovery area, select Settings.
4. Make sure that Kernel memory dump or Complete memory dump is selected under Writing Debugging Information.

28 авг. 2019 г.