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You May Want To Wait On Trying Out The Linux 4.2 Kernel

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  • You May Want To Wait On Trying Out The Linux 4.2 Kernel

    Phoronix: You May Want To Wait On Trying Out The Linux 4.2 Kernel

    If you're a Linux enthusiast that's a habitual upgrader of the Linux kernel, you may want to hold off a few days on trying out the Linux 4.2 development kernel. For several systems, I've seen nothing but kernel panics the past few days when riding the mainline Linux kernel Git...

    http://www.phoronix.com/scan.php?pag...Linux-4.2-Woes

  • #2
    I downloaded the 4.2 from the Ubuntu repositories and got Kernel panics too, in a FX8350 based system.

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    • #3
      One of the biggest problems on my system: https://bugzilla.kernel.org/show_bug.cgi?id=101061
      Post your bugreports here to share your problems

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      • #4
        AMD FX-8120 on FX990 chipset also gets a very quick kernel panic attempting to boot the 4.2 kernel as built by the Ubuntu kernel PPA late on July 5

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        • #5
          Before anyone asks, no, unfortunately it's not much of an option to do the bisecting of the regressions given the affected systems are rather slow, and while PTS has support for auto-bisecting and can withstand preserving states across reboots, it will hang on the faulty kernel revisions and require manual intervention to recover.
          It seems that with Grub's one time boot and automatic reboot on kernel panic, you could get around the latter limitation. Won't help the speed, though.

          A Continuous Integration-like system for testing Linux kernel development would be really great and something I would definitely support. I wonder if any companies like Intel are already doing something like this internally.

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          • #6
            Originally posted by adler187 View Post
            It seems that with Grub's one time boot and automatic reboot on kernel panic, you could get around the latter limitation. Won't help the speed, though.

            A Continuous Integration-like system for testing Linux kernel development would be really great and something I would definitely support. I wonder if any companies like Intel are already doing something like this internally.
            I haven't found an easy way to tell GRUB that "If(kernel panic) reboot to older kernel instead as the default", if there was a way to do that, PTS already takes care of handling the rest. Rather right now it always seems to default to the latest (broken) kernel.
            Michael Larabel
            http://www.michaellarabel.com/

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            • #7
              No idea, rc1 all works fine since yesterday release of rc1 here on Athlon 5350 and Debian Sid... but it is self compiled minimal one, not a distro kernel.

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              • #8
                In Sunday I was bisecting kernel, and it booted every time. Can you provide .config of your kernel? What compiler you used?
                Last edited by sobkas; 07-06-2015, 04:59 PM.

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                • #9
                  It is compiled using Sid's default gcc 4.9 and rc1 tarball. localmodconfig-ed and couple things added/removed too, etc.. that config is likely completely unusable for you but anyway as you wish:

                  http://paste.debian.net/plain/279629
                  Last edited by dungeon; 07-06-2015, 05:05 PM.

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                  • #10
                    for me it runs fine, no issues whatsoever since it was in the fc23 (rawhide) repos - i.e. 2 or 3 days

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