metropolis: prevent printk console pollution

This implements two separate approaches to limit printk pollution of the
new tconsole:

 1. Sets the minimum printk level to EMERG. Everything lower than this
    level will not get blasted to tty0.
 2. Jut in case something does a spurious EMERG printk (or something
    just writes to tty0), we redraw the console. This makes it
    self-healing.

Change-Id: I69370ebf6c3cb3cacc8b6ea1ad3703e758bbf50c
Reviewed-on: https://review.monogon.dev/c/monogon/+/3398
Tested-by: Jenkins CI
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
2 files changed
tree: ebbbb10d975d6f84cfa56bd45db904379d2ddb84
  1. .github/
  2. build/
  3. cloud/
  4. go/
  5. intellij/
  6. metropolis/
  7. osbase/
  8. third_party/
  9. tools/
  10. version/
  11. .bazelignore
  12. .bazelproject
  13. .bazelrc
  14. .bazelrc.ci
  15. .bazelrc.sandboxroot
  16. .bazelversion
  17. .git-ignore-revs
  18. .gitignore
  19. BUILD.bazel
  20. CODING_STANDARDS.md
  21. go.mod
  22. go.sum
  23. LICENSE
  24. MODULE.bazel
  25. MODULE.bazel.lock
  26. README.md
  27. SETUP.md
  28. shell.nix
  29. WORKSPACE
README.md

Monogon Monorepo

This is the main repository containing the source code for the Monogon Platform.

This is pre-release software - take a look, and check back later! In the meantime, join us on Matrix (#monogon-os-community:matrix.org) or Discord.

Environment

Our build environment is self-contained and requires only minimal host dependencies:

  • A Linux machine or VM.
  • Bazelisk >= v1.15.0 (or a working Nix environment).
  • A reasonably recent kernel with user namespaces enabled.
  • Working KVM with access to /dev/kvm (if you want to run tests).

Our docs assume that Bazelisk is available as bazel on your PATH.

Refer to SETUP.md for detailed instructions.

Monogon OS

The source code lives in //metropolis (Metropolis is the codename of Monogon OS).

See the //metropolis/README.md for a developer quick start guide, or see the Monogon OS Handbook for user documentation.