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Linux 5.2 Live-Patching Makes Use Of GCC 9 Option That May Slowdown Select Cases

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  • Linux 5.2 Live-Patching Makes Use Of GCC 9 Option That May Slowdown Select Cases

    Phoronix: Linux 5.2 Live-Patching Makes Use Of GCC 9 Option That May Slowdown Select Cases

    If you make use of Linux kernel live-patching or even just have CONFIG_LIVEPATCH enabled, when switching to Linux 5.2 and building with GCC 9, the performance may be impacted in select workloads...

    Phoronix, Linux Hardware Reviews, Linux hardware benchmarks, Linux server benchmarks, Linux benchmarking, Desktop Linux, Linux performance, Open Source graphics, Linux How To, Ubuntu benchmarks, Ubuntu hardware, Phoronix Test Suite

  • #2
    Is it enabled by default?

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    • #3
      Originally posted by Hi-Angel View Post
      Is it enabled by default?
      As said in the article, yes, if you use CONFIG_LIVEPATCH enabled. Most distro kernels these days do have CONFIG_LIVEPATCH enabled.
      Michael Larabel
      https://www.michaellarabel.com/

      Comment


      • #4
        Originally posted by Michael View Post

        As said in the article, yes, if you use CONFIG_LIVEPATCH enabled. Most distro kernels these days do have CONFIG_LIVEPATCH enabled.
        Thanks, I saw it, made me wondering in turn though whether this CONFIG_LIVEPATCH is enabled by default. So, most distros have it enabled, I see, thanks.

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        • #5
          I'm glad I compile my own kernels because I don't have this enabled...because my distribution doesn't

          Arch and Manjaro don't have this enabled. They have

          Code:
          CONFIG_HAVE_LIVEPATCH=y
          # CONFIG_LIVEPATCH is not set
          I wonder if CONFIG_HAVE_LIVEPATCH should be disabled too?

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