Translations:Kernel/Upgrade/44/en

The kernel configuration is saved in a file named in the directory that holds the kernel sources. A new kernel may have had options or features added or removed since the old kernel. The kernel configuration specifies whether a kernel's features and options will be enabled or not, perhaps built into the kernel, or perhaps built as modules which can be loaded into the running kernel on demand. Hence the configuration file of the new kernel may have new entries the configuration file of the old kernel doesn't have, and it might not have entries anymore which are present in the configuration file of the old kernel.