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Add --force option to step 2 in early-kdump-howto.txt

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For step2 in early-kdump-howto.txt, --force option of dracut
is necessary to rebuild system initramfs. Without --force option,
executing step2 fails because system initramfs already exists.

Signed-off-by: Shigeki Morishima <s.morishima@jp.fujitsu.com>
Acked-by: Kairui Song <kasong@redhat.com>
This commit is contained in:
s.morishima@fujitsu.com 2020-02-06 02:52:24 +00:00 committed by Kairui Song
parent 2af3537dfa
commit a878ad0100
1 changed files with 5 additions and 3 deletions
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8
early-kdump-howto.txt
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@ -34,14 +34,16 @@ You can rebuild the initramfs with earlykdump support with below steps:
For the failure_action, you can choose anything other than "reboot".
2. rebuild system initramfs with earlykdump support.
# dracut --add earlykdump
# dracut --force --add earlykdump
NOTE: Recommend to backup the original system initramfs before performing
this step to put it back if something happens during boot-up.
3. add rd.earlykdump in grub kernel command line.
Note:
[1]. Early kdump initramfs size will be large because it includes vmlinuz and
kdump initramfs. And for step 2 if you are sure to overwrite system initramfs
you can backup the original initramfs and use "--force" option.
kdump initramfs.
[2]. Early kdump inherits the settings of normal kdump, so any changes that
caused normal kdump rebuilding also require rebuilding the system initramfs