Cannot do kexec in old Redhat EL 4
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  1. #1
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    Cannot do kexec in old Redhat EL 4

    Hello,

    I am trying to kexec kernel 3.2 of Debian Wheezy from an old kernel 2.6 of Redhat EL 4

    Getting following error message:

    kexec_load failed «function not implemented»

    Please suggest how can this be corrected?

    Shall any kernel module be loaded for kexec to work?

    Kind Regards

  2. #2
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    Linux (Fedora) Firefox 64.0

    Re: Cannot do kexec in old Redhat EL 4

    moved to Linux Chat as post does not seem to be related to Fedora.
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  3. #3
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    Linux Chrome 70.0.3538.345

    Re: Cannot do kexec in old Redhat EL 4

    Quote Originally Posted by bob
    moved to Linux Chat as post does not seem to be related to Fedora.
    Actually 10 years ago Redhat was a more stable release of Fedora.

  4. #4
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    Re: Cannot do kexec in old Redhat EL 4

    yes, Fedora 3 was the basis for RHEL4 but it's still not really Fedora, so he moved it to Linux chat

    But back to the issue, try:

    grep KEXEC /boot/config-$(uname -r)

    If you don't see the KEXEC related values as 'y' or 'm' then that's your problem (your 2.6 kernel didn't have kexec function)

  5. #5
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    Windows NT 6.3 Chrome 68.0.3440.857

    Re: Cannot do kexec in old Redhat EL 4

    Quote Originally Posted by marko
    yes, Fedora 3 was the basis for RHEL4 but it's still not really Fedora, so he moved it to Linux chat

    But back to the issue, try:

    grep KEXEC /boot/config-$(uname -r)

    If you don't see the KEXEC related values as 'y' or 'm' then that's your problem (your 2.6 kernel didn't have kexec function)
    KEXEC is missing in the kernel config file.

    It is a factory made LiveCD with RHEL4, I cannot modify it and would like to use it instead of a customized or another live cd for security reasons, I am more confident in this LiveCD.

    Is it somehow possible to add KEXEC capability to a precompiled kernel missing KEXEC?
    If it is a module, may be I can build the module in the Linux filesystem root installed from this LiveCD?
    Then I can boot from LiveCD, chroot to filesystem root and load module. Is it possible somehow like this to fix missing KEXEC ?


    It is a RHEL4 kernel:
    kernel-2.6.9-67
    Last edited by romankqsok; 7th January 2019 at 05:02 PM.

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