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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...

    http://www.phoronix.com/scan.php?pag...ivepatch-Lands

  • #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
      http://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.

        Comment


        • #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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