There is currently a problem with earlykdump image building, when a user
is upgrading kernel, dracut will generate new initramfs for the new
kernel, and earlykdump will install currently running version of kernel
into the initramfs, and remain the version based kernel image naming
untouched. But after a reboot the new kernel is running, and it
will try to load the image corresponding to the new kernel version by
file naming.
This patch fixes the problem by creating a symlink with unified stable
naming to the installed kernel image and initramfs, and use the symlink
instand so it will always work despite the kernel version number change.
Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Kdump service starts too late, so early crashes will have no chance
to get kdump kernel booting, this will cause crash information to be
lost. It is necessary to add a dracut module in order to load crash
kernel and initramfs as early as possible. You can provide "rd.early
kdump" in grub commandline to enable, then the early kdump will load
those files like the normal kdump, which is disabled by default.
For the normal kdump service, it can check whether the early kdump
has loaded the crash kernel and initramfs. It has no conflict with
the early kdump.
If you rebuild the new initramfs for early kdump, the new initramfs
size will become large, because it will put the vmlinuz and kdump
initramfs into the new initramfs.
In addition, early kdump doesn't support fadump.
Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
Reviewed-by: Kazuhito Hagio <khagio@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Kairui Song
Lianbo Jiang