How do I remove crashkernel from cmdline?

https://forums.rockylinux.org/t/how-do-i-remove-crashkernel-from-cmdline/13346

post by label on Mar 27, 2024 post by dxdxdt on Mar 27, 2024 post by iwalker on Mar 27, 2024 post by dxdxdt on Mar 27, 2024 post by jlehtone on Mar 27, 2024 post by dxdxdt on Mar 27, 2024 post by iwalker on Mar 27, 2024 post by dxdxdt on Mar 27, 2024 post by iwalker on Mar 27, 2024 post by iwalker on Mar 27, 2024 post by jlehtone on Mar 27, 2024 post by dxdxdt on Mar 27, 2024 post by dxdxdt on Mar 27, 2024 post by jlehtone on Mar 27, 2024 post by jbkt23 on Mar 27, 2024 post by Ritov on Mar 28, 2024 post by dxdxdt on Mar 28, 2024 post by Ritov on Mar 28, 2024 post by dxdxdt on Mar 28, 2024 post by iwalker on Mar 28, 2024 post by Ritov on Mar 28, 2024 post by iwalker on Mar 28, 2024 post by Ritov on Mar 29, 2024 post by jlehtone on Mar 29, 2024 post by jbkt23 on Mar 29, 2024 post by iwalker on Mar 29, 2024 post by Ritov on Mar 29, 2024 post by ganphx on Mar 29, 2024 post by dxdxdt on Mar 31, 2024 post by dxdxdt on Mar 31, 2024 post by dxdxdt on Mar 31, 2024 post by ganphx on Mar 31, 2024 post by dxdxdt on Mar 31, 2024 post by dxdxdt on Mar 31, 2024 post by iwalker on Mar 31, 2024 post by jlehtone on Mar 31, 2024 post by ganphx on Apr 2, 2024 ganphx dxdxdt Apr 2024

This seems to work in RL 9.3. Now we can wait until RL 9.4 is ready.

[ 0.000000] Command line: BOOT_IMAGE=(hd0,msdos1)/vmlinuz-5.14.0-362.24.1.el9_3.x86_64 root=/dev/mapper/rl-root ro resume=/dev/mapper/rl-swap rd.lvm.lv=rl/root rd.lvm.lv=rl/swap rhgb quiet audit=1 crashkernel=no [ 0.005467] crashkernel: memory value expected [ 0.049198] Kernel command line: BOOT_IMAGE=(hd0,msdos1)/vmlinuz-5.14.0-362.24.1.el9_3.x86_64 root=/dev/mapper/rl-root ro resume=/dev/mapper/rl-swap rd.lvm.lv=rl/root rd.lvm.lv=rl/swap rhgb quiet audit=1 crashkernel=no

grubby –update-kernel=ALL –args=”crashkernel=no”

(1004 / 5) [~]$: free -m total used free shared buff/cache available Mem: 3913 999 2527 15 636 2914 Swap: 3071 0 3071

(1003 / 4) [~]$: makedumpfile –mem-usage /proc/kcore show_mem_usage: No memory is reserved for crashkernel!

makedumpfile Failed.

(1001 / 2) [~]$: kdumpctl estimate Reserved crashkernel: 0M Recommended crashkernel: 192M

Kernel image size: 53M Kernel modules size: 9M Initramfs size: 32M Runtime reservation: 64M Large modules: xfs: 2473984 ext4: 1167360 WARNING: Current crashkernel size is lower than recommended size 192M.

(1002 / 3) [~]$: kdumpctl showmem kdump: Reserved 0MB memory for crash kernel

post by dxdxdt on Apr 2, 2024 dxdxdt Apr 2024

No it doesn’t for new installs of kernel. Many people have already suggested using grubby. Please review the threads.

post by dxdxdt on Apr 2, 2024 dxdxdt jlehtone Apr 2024

Commit - rpms/kexec-tools - 4335b50c0d914ba8c72a42cbdc170bad444b11ed - CentOS Git server
Tree - rpms/kexec-tools - src.fedoraproject.org

Yes. That’s what I’m saying. I’m sure there are differences from RHEL.

2 months later Closed on Jun 1, 2024

Closed on Jun 1, 2024

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