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feat(hermes): enable zram swap to survive nixos-upgrade OOM spikes #29

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hermes wants to merge 1 commit from hermes/hermes-zram into main AGit
pull from: hermes/hermes-zram
merge into: harald:main
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hermes commented 2026-08-30 18:25:08 +02:00
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The 8 GiB guest had swapDevices = [ ] and zero swap; the 2026-08-29
nixos-upgrade build hit global OOM (kernel killed nix, total-vm 7.2G).
zram (zstd, 50%) gives the kernel headroom to page out, same shape as
sgx/amd. Merge+deploy by Harald (autoUpgrade timer).

The 8 GiB guest had swapDevices = [ ] and zero swap; the 2026-08-29 nixos-upgrade build hit global OOM (kernel killed nix, total-vm 7.2G). zram (zstd, 50%) gives the kernel headroom to page out, same shape as sgx/amd. Merge+deploy by Harald (autoUpgrade timer).
feat(hermes): enable zram swap to survive nixos-upgrade OOM spikes
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nix flake check / flake-check (pull_request) Successful in 3m59s
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8db425f5a0 
The 8 GiB guest had swapDevices = [ ] and zero swap; the 2026-08-29
nixos-upgrade build hit global OOM (kernel killed nix, total-vm 7.2G).
zram (zstd, 50%) gives the kernel headroom to page out, same shape as
sgx/amd. Merge+deploy by Harald (autoUpgrade timer).
All checks were successful
nix flake check / flake-check (pull_request) Successful in 3m59s
Details
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From your project repository, check out a new branch and test the changes.
git fetch -u origin +refs/pull/29/head:hermes/hermes-zram
git switch hermes/hermes-zram
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