Meltdown Update Kernel doesnt boot

Re:Meltdown Update Kernel doesnt boot by trendia on Wednesday January 10, 2018 @06:26PM (#16120107)

(Copying my instructions from another post).

If kernel 4.4 doesn't work, I recommend compiling the 4.15 kernel. (Note, however, that you may need to apply a patch to NVIDIA drivers).

I've done this on Ubuntu 16.04 LTS, 17.10, and Debian 8 so far this week. To compile, set CONFIG_PAGE_TABLE_ISOLATION=y. That is:

    sudo apt-get build-dep linux
    sudo apt-get install gcc-6-plugin-dev libelf-dev libncurses5-dev
    cd /usr/src
    wget https://git.kernel.org/torvalds/t/linux-4.15-rc7.tar.gz
    tar -xvf linux-4.15-rc7.tar.gz
    cd linux-4.15-rc7
    cp /boot/config-`uname -r` .config
    make CONFIG_PAGE_TABLE_ISOLATION=y deb-pkg

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Re:Meltdown Update Kernel doesnt boot by lathiat on Wednesday January 10, 2018 @10:00PM (#16121138)

I wouldn't really recommend doing this, but if you really want to do this, it would probably be easier just to use the pre-spun mainline kernels: https://wiki.ubuntu.com/Kernel/MainlineBuilds

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Re:Meltdown Update Kernel doesnt boot by gphreak on Thursday January 11, 2018 @01:21AM (#16121793)

Exactly, and use 4.14. According to a recent comment from a kernel dev both kernels use the same patch approach. 4.4 and 4.9 are using a different approach that’s less ideal, less complete and apparently less tested.

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Re:Meltdown Update Kernel doesnt boot by trendia on Thursday January 11, 2018 @10:18AM (#16124369)

I can somewhat understand where you're coming from if the person doing it only wants something that works.

But for those who would be willing to risk breaking a few things to try something out, building a kernel is a worthwhile effort, and the meltdown / spectre bugs provide a perfect excuse to do it.

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