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Juliusz Sosinowicz
f2fa741bad
The socat suite is sleep-bound and slow run serially. Drive it through parallel-make-check.py as ~6 shards per CPU, 2 running per CPU at once: each shard runs a round-robin slice of the tests in its own bwrap network namespace (so parallel shards don't collide on ports) and its own build-dir copy. The work is almost all waiting, so the oversubscription just overlaps the waits. Install bubblewrap so the netns isolation actually happens (without it the runner silently shares one namespace and the shards collide). Each fresh netns is IPv4-loopback only, so re-create IPv6 loopback (CAP_NET_ADMIN) for the ::1 / dual-stack tests, and add non-loopback placeholders (fc00::1, 192.0.2.1) so glibc's AI_ADDRCONFIG still returns both families - without them socat's getaddrinfo fails on numeric non-loopback addresses, e.g. the multicast tests. Relax the AppArmor unprivileged-userns restriction so the bwrap netns + CAP_NET_ADMIN work on ubuntu-24.04.