Commits on Jul 15, 2022

1. coreos-printk-quiet.service: Lower kernel log level to 4 …

   Closes: coreos/fedora-coreos-tracker#1244
   
   A lot going on for this simple service.  See the tracker issue above
   for more info, but briefly:
   
   Anaconda has historically injected `quiet` into the kernel command
   line in many cases, and this suppresses *both* kernel and systemd
   output.  On computers in general, but particularly many bare metal
   servers, the serial console can be slow.  This can cause reliability
   issues.
   
   However for servers, we usually *do* want to see informational
   output when they boot.  For example, today the kernel "mitigations"
   information for hardware vulnerabilities is output.
   
   This change is a compromise; we boot up at the kernel's default
   verbosity level (which for Fedora and derivatives is the upstream 7),
   but switch to 4 very early on in the real root.  At that point, we've
   gotten most of the boot time output, and our initramfs is not
   extremely performance sensitive right now.
   
   Also, we explicitly only *lower* the output log level, and only if
   there isn't explicitly `debug` on the kernel command line.

   

   cgwalters committed Jul 15, 2022
   Configuration menu

   • View commit details
   • Copy full SHA for 25a2883
   • Browse repository at this point

   Copy the full SHA

   25a2883 View commit details

   Browse the repository at this point in the history