[redhat] Generate a crashkernel.conf for each kernel build
It has been a long-term demand for having a default crashkernel value for each kernel build. This helps to manage kernel's crashkernel usage by kernel version and provide users a reference default value.
RHEL kernels support a crashkernel=auto
cmdline param. And kernel
have a built-in default value used when auto
is specified.
Many attempts are made to push this upstream. Recent attempt to
push this upstream raised a lot of discussions 1.
Upstream is not accepting this crashkernel=auto
design. So after
more discussions, instead of adding a default value in kernel, just
add a config that packaged with kernel is more doable. Other packages,
like kexec-tools2, can use this as a reference and update kernel
cmdline param.
Signed-off-by: Kairui Song kasong@redhat.com