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Eee: MGLRU min_ttl, earlyoom on RAM alone

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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rope 2026-09-29 19:34:32 +01:00
parent de5e2968e7
commit 169447f593
1 changed files with 7 additions and 1 deletions
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hosts/FredOS-Eee.nix
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@ -101,8 +101,14 @@ in
# 1GB RAM: compressed swap only (disk swap is off, see hardware file).
zramSwap.enable = true;
# A heavy page (bbc.co.uk) used to freeze everything; now the biggest
# process (the browser's web process) dies instead.
# process (the browser's web process) dies instead. zram lives in RAM, so
# swap never looks full: judge on RAM alone.
services.earlyoom.enable = true;
services.earlyoom.freeSwapThreshold = 100;
# Even with no disk swap it still froze: the kernel kept evicting and
# re-reading program code from disk. MGLRU's min_ttl OOM-kills instead
# when it can't keep the last 1s of working set in RAM.
systemd.tmpfiles.rules = [ "w /sys/kernel/mm/lru_gen/min_ttl_ms - - - - 1000" ];
# The NixOS manual is a big from-source build on i686 for a page nobody reads.
documentation.nixos.enable = false;