Kernel Panic after Kernel update

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We are experiencing a kernel panic on one of our linux machines with the latest two version of the RHEL 6 kernels (2.6.32-696-28.1.el6.x86_64 or 2.6.32-696-30.1.el6.x86_64). However we can boot the machine into an older kernel (2.6.32-696-23.1.el6.x86_64) just fine. I took a picture of the kernel panic output I see on the monitor. Any help or suggestions are greatly appreciated.

Thanks!

Kernel Panic

DP
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Responses

SM Guru 3731 points
31 May 2018 6:24 AM

These are the initial things that I normally check when this happens:

  • Boot into working kernel and check the following.
  • Make sure there is enough free space on /boot & /tmp
  • Examine the log files for any hints or errors.
  • Check if respective vmlinuz image file is generated for the new kernel under /boot. You may try rebuilding initrd image. After this reboot and test if systems boots fine into new kernel. Compare the old initrd image file with new one. https://access.redhat.com/solutions/1958
  • If still no go, then you may remove the newly installed kernel and re-install it (yum remove & yum install ), and rebuild initrd/initramfs file.
Akemi Yagi's picture Guru 2404 points
31 May 2018 3:34 PM

I suggest trying the last one first, that is, to reinstall the kernel. It will most likely fix the issue.

DP Newbie 10 points
31 May 2018 4:16 PM

When we run "yum remove" and then "yum install" for the latest kernel, we only see the initramfs file in /boot. Should we also see the initrd file too? Thanks!

SM Guru 3731 points
31 May 2018 6:09 PM

No, it is initramfs in RHEL6/7, which was called 'initrd' in earlier versions. Try booting into the new kernel and after the re-build and check if that works.

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