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Linux 4.16-rc1 Kernel Released With Many Changes

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  • Linux 4.16-rc1 Kernel Released With Many Changes

    Phoronix: Linux 4.16-rc1 Kernel Released With Many Changes

    Just like clockwork, the first release candidate of Linux 4.16 is now available...

    http://www.phoronix.com/scan.php?pag....16-rc1-Kernel

  • #2
    Apparently Spectre v1 mitigation has landed already in 4.14. Never saw any news about it here. Missed it, Michael?

    Code:
    $ cat /sys/devices/system/cpu/vulnerabilities/spectre_v1  
    Mitigation: __user pointer sanitization

    Comment


    • #3
      Yeah 4.14.18 have spectre1 mitigated, while 4.9, 4.4 or older not yet... actually older than these have not spectre2 yet, but all have pti.

      Short news

      Code:
      > cat /proc/sys/kernel/osrelease
      4.14.18
      > cat /sys/devices/system/cpu/vulnerabilities/*
      Not affected
      Mitigation: __user pointer sanitization
      Mitigation: Full AMD retpoline
      Last edited by dungeon; 02-11-2018, 08:19 PM.

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      • #4
        If Linus is happy, I'm happy.

        Comment


        • #5
          4.15.2 seems to have added spectre v1 mitigation too:

          > cat /proc/sys/kernel/osrelease
          4.15.2
          > cat /sys/devices/system/cpu/vulnerabilities/*
          Not affected
          Mitigation: __user pointer sanitization
          Mitigation: Full AMD retpoline

          Compiled using GCC 7.3. Now, which programs need to be recompiled using the spectre gcc changes? Everything except games?

          Comment


          • #6
            Originally posted by audi100quattro View Post

            Compiled using GCC 7.3. Now, which programs need to be recompiled using the spectre gcc changes? Everything except games?
            Everything and nothing It is just that retopline require this.

            Third party kernel modules needs to be built by same to say 'spectre-aware' compiler of course, otherwise kernel will warn you
            Last edited by dungeon; 02-11-2018, 09:29 PM.

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            • #7
              Just updated, very excited to see MUCH better performance with amdgpu.dc=1 on my RX460 compared to the 4.15 kernels, which was completely broken.

              All 4.15 kernels with amdgpu.dc=1 are unusable to me, got terrible performance. Now I'm getting better performance than I did with 4.14, or 4.15 with amdgpu.dc=0

              Finally, HDMI audio, and even better performance.

              Comment


              • #8
                Should drop x86 support altogether.

                Comment


                • #9
                  Originally posted by hax0r View Post
                  Should drop x86 support altogether.
                  ... riiiiiiiight...

                  Comment


                  • #10
                    Originally posted by czz0 View Post
                    Just updated, very excited to see MUCH better performance with amdgpu.dc=1 on my RX460 compared to the 4.15 kernels, which was completely broken.

                    All 4.15 kernels with amdgpu.dc=1 are unusable to me, got terrible performance. Now I'm getting better performance than I did with 4.14, or 4.15 with amdgpu.dc=0

                    Finally, HDMI audio, and even better performance.
                    Mainline kernels do have partially implemented amdgpu driver. Use this one: https://cgit.freedesktop.org/~agd5f/...-next-4.17-wip

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