Three quality-of-life improvements now that the daemon-side races
that gated parallel mode are fixed:
1. **Smol VMs by default.** Smoke installs a tuned config.toml at
/etc/banger/config.toml between `system install` and `system
restart` so the respawned daemon picks up:
vcpu = 2
memory_mib = 1024
disk_size = "2G"
system_overlay_size = "2G"
Smoke scenarios assert behavior, not capacity — they don't need
4 vCPU / 8 GiB / 8 GiB / 8 GiB. Per-VM RAM cost drops from 8 GiB
to 1 GiB; nominal disk drops from 16 GiB to 4 GiB (sparse, so
actual use is small either way, but the new ceiling is gentler
on hosts that can't overcommit). Scenarios that test
reconfiguration (vm_set's --vcpu 2 → 4) still pass --vcpu
explicitly, so this default doesn't perturb their assertions.
2. **JOBS defaults to nproc.** The Makefile resolves JOBS to
`$(shell nproc)` if unset; the smoke script's existing cap of 8
keeps the parallel pool sane on bigger hosts. The script always
passes --jobs N now, so behavior is consistent. Override with
`make smoke JOBS=1` for a fully serial run.
3. **Help text catches up.** --help no longer flags parallelism as
experimental (the underlying daemon races are fixed) and now
describes the small-VM default. `make help` mentions the new
default and how to override.
Verified: `make smoke` (no JOBS) on a 32-core box auto-runs with
JOBS=8, smol VMs, 21/21 PASS in 172s.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Thales Maciel
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