The Pi now boots with cgroup_enable=memory cgroup_memory=1; the MemAvailable guard stays as a
second layer and as the fallback on systems without the memory controller.
scripts/pi_run.sh runs heavy jobs in their own process group and stops them when
MemAvailable drops below a floor (Raspberry Pi OS boots with cgroup_disable=memory, so a
systemd MemoryMax cap is not available); a 360-sample genotype run with cohort QC had
exhausted memory and the OOM killer took down the desktop session.
kemal