What issues might I face using the epel mainline kernel with CentOS?
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  1. #1
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    What issues might I face using the epel mainline kernel with CentOS?

    I'm upgrading a dual processor Opteron (Abu Dhabi) to a Ryzen 2000 series processor.

    I understand that there seems to be a minimum retirement somewhere in the 4.x kernels for proper boost support and stability being somewhere around 4.18. As the Ryzen processors are not officially supported by RHEL 7 and there haven't been any backports for it yet that I'm aware of, I'm looking at either using Fedora Server or CentOS 7 with the epel mainline kernel.

    I always prefer CentOS as I don't have any pressing need for the latest packages and am always happy with the stability and consistency provided by the distro. I've never used the mainline kernel with CentOS before. What issues might I face with this configuration? Should it be more or less transparent?

    I also want to mention that CentOS 7.5 actually installs and runs just fine with the stock kernel. But there is a warning message at startup about the unsupported hardware. I haven't done any further testing beyond confirming that it boots and runs.

  2. #2
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    Re: What issues might I face using the epel mainline kernel with CentOS?

    I'm curious, been reading a while with backward compatibility in other brand, and most of them seems to have a problem with ASRock mobo, so I'm guessing it must be a mobo problem not processor.

  3. #3
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    Re: What issues might I face using the epel mainline kernel with CentOS?

    By epel, do you mean ElRepo? I can't think of any issues off the top of my head, but as long as you're not removing the current working kernel there's little to no risk of trying it out as you can always boot in to the old kernel if things don't work.

    If the ElRepo kernels don't suit your needs either, you can always compile your own from the latest stable kernel source, there are different methods but here's a guide which makes it look a lot more complicated than it actually is: https://fedoraproject.org/wiki/Build...nel/Source_RPM . To simplify, the process is:

    - Download the kernel source release you wish to use from git as a tarball and unpack it or "git clone"
    - cd linux
    - [Optional] Apply any patches you require to the source
    - Use dnf to download your *current* kernel's source package (Can't remember if this is actually required for the next step or not)
    - Copy the .config file from /boot/config-<kernel name>
    - Use a text editor to add something to the "EXTRAVERSION" variable in Makefile (to avoid overwriting any other kernels, can be anything, "custom", "<yourName>" whatever).
    - make oldconfig (which applies the old kernels config settings to the new kernel, there may be some choices to make re: new things added since your old kernel version)
    - make menuconfig (which brings up a text type menu where you can enable any modules you may want to add support for in relation to your Ryzen 2000)
    - make bzImage
    - make modules
    - make modules_install
    - make install
    - There's no need to add the kernel to grub, it's done for you these days.

  4. #4
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    Re: What issues might I face using the epel mainline kernel with CentOS?

    moved (belatedly) to Linux Chat since it does not involve Fedora.
    Linux & Beer - That TOTALLY Computes!
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    Don't use any of my solutions on working computers or near small children.

  5. #5
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    Re: What issues might I face using the epel mainline kernel with CentOS?

    EPEL and ElRepo are two different things. EPEL is some programs not included in default RedHat or CentOS installs, and ElRepo is done by a small group, to add various drivers, for example, NVidia and some wireless drivers, and possibly a newer kernel.

    https://wiki.centos.org/AdditionalRe...s/Repositories

  6. #6
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    Re: What issues might I face using the epel mainline kernel with CentOS?

    I've run mainline kernels in centos, it worked fine.

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