Kdump can be started with an initscript or with the mkdumprd command.
Previously, the vmcore file created by the former method had the
"--sparse=always" option applied to it when copied, resulting in a smaller
file than when a dump was initiated by the mkdumprd command. The same option
has now been added as a default value in the kdump.conf configuration file,
therefore ensuring that the default behavior is consistent, regardless of how
the dump was initiated.