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  1. RHEL
  2. RHEL-97470

crashkernel default size too small for RHEL 9 supported system requirements

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      What were you trying to do that didn't work?

      The kdump crashkernel arming fails. It seems the default size has changed and only memory sizes with minimally 2G are considered now. However, the RHEL 9 minimal RAM requirement seems to be 1.5GB.

      What is the impact of this issue to you?

      I have to update all of our kickstart files.

      Please provide the package NVR for which the bug is seen:

      kexec-tools-2.0.29-7.el9

      How reproducible is this bug?:

      100%

      Steps to reproduce

      1. Install a system with less than 2GB without setting the addon kickstart com_redhat_kdump or run
        kdumpctl reset-crashkernel

        as described in the KB article for RHEL 9

      1. Boot into the system or reboot the system

      Expected results

      Failed to start Crash recovery kernel arming

      The kernel commandline confirms

      crashkernel=2G-64G:256M,64G-:512M

      Actual results

      The crashkernel can't be armed. The kernel commandline confirms

      crashkernel=2G-64G:256M,64G-:512M

      Additional information

      1. It seems with kexec-tools-2.0.29-5.el9 the minimal size of 1G is still conidered, I see in my previously installed VM:
        crashkernel=1G-4G:192M,4G-64G:256M,64G-:512M
      1. The RHEL 9 system requirements document 1.5GB minimal RAM, s. this link
      2. Please note that KVM VMs have minimal memory limitations below 2G, s. this link

              rh-ee-lichliu Lichen Liu
              smitterl@redhat.com Sebastian Mitterle
              Wade Mealing
              kdump team kdump team
              kdump team kdump team
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                Created:
                Updated:
                Resolved: