Krzysztof kuhy Rudnicki cb3c985ee6 vmbox: 3-4x faster runs, a read-only host package cache, and vm scp ... `vm run` took 41s cold / 30s warm to run `true`. Both were vmbox waiting on itself. Now 12s / 0s, with all five shutdown verdicts re-tested unchanged. - _run_settle waited up to 30s for the kernel's "reboot: Power down" marker UNCONDITIONALLY, including on the majority of runs that leave the guest up, where that marker is never going to appear. It now settles only when the guest has actually stopped, or when ssh returned 255 (what a successful poweroff looks like from the host). - The ssh readiness polls used a 5s ConnectTimeout. QEMU's user-mode networking ACCEPTS the forwarded connection while the guest still has nothing on :22, so each probe blocked for the full timeout instead of failing fast: a guest reachable at ~10s was reported up at ~45s. Fixed in both the sandbox and build paths, via an env override -- ssh honours the FIRST value for an option, so a second -o could not have worked. Making runs fast exposed a race: sshd now answers BEFORE tty1's autologin has started Xorg, so the X environment could be missing on the first run after a boot. `VMBOX_X_WAIT=<seconds>` waits for the session; it defaults to 0 so an ordinary run never pays for a graphical session it is not using. Build: the host's /var/cache/pacman/pkg is offered to the build guest read-only (`readonly=on` AND an `ro` mount, because it is the real host cache) as an extra CacheDir after the guest's own writable one, so a package the host lacks still downloads rather than failing the build. This removes the 396 MiB the build used to fetch. Host cache verified byte-for-byte identical across four builds: same file count, same size, same mtime. Build time itself moved only 103.8s -> 100.3s. Per-phase timings (also added here) show why: 47s of it is the build guest's cloud-init first boot, and that is NOT datasource probing -- `cloud-init analyze blame` totals 2.27s. Left unexplained rather than guessed at; SESSION_RESULTS.md records the evidence. Also: `vm scp`, which lib/ssh.sh could always do but the CLI never exposed, and provision.sh split at the 250-line cap. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01VdyMBGCrGVGDWtJ9xe48f3		2026-08-22 23:17:21 +02:00
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vm	vmbox: 3-4x faster runs, a read-only host package cache, and vm scp	2026-08-22 23:17:21 +02:00