Davíð Steinn Geirsson 32d6a4a98f feat(rootfs): move overlay upper layer from tmpfs to ephemeral qcow2 ... VM root overlay writes now go to a sparse qcow2 disk instead of tmpfs, reducing host RAM usage. The host creates the qcow2 at VM start and deletes it at stop. The guest formats it as ext4 with discard support. Adds rootOverlay option (type: qcow2/tmpfs, size: default 10G) with tmpfs available as fallback for the original behavior. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>		2026-02-14 12:58:02 +00:00
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helpers.nix	feat(rootfs): move overlay upper layer from tmpfs to ephemeral qcow2	2026-02-14 12:58:02 +00:00