https://nalar.dev/tags/clone3/ Recent content in Clone3 on Nalar Hugo en-us Sat, 19 Sep 2026 00:00:00 +0000 https://nalar.dev/clone-into-cgroup-places-child-in-target-cgroup-at-creation/ Sat, 19 Sep 2026 00:00:00 +0000 https://nalar.dev/clone-into-cgroup-places-child-in-target-cgroup-at-creation/ <h1 id="clone_into_cgroup-places-a-child-in-its-target-cgroup-at-creation">CLONE_INTO_CGROUP Places a Child in Its Target cgroup at Creation</h1> <p>A process created in one cgroup and moved to another has a short but real interval in the original cgroup. During that interval, accounting, resource controls, and freezer state come from the initial placement rather than the destination. Linux provides <code>CLONE_INTO_CGROUP</code> so <code>clone3()</code> can place the child in a cgroup v2 target as part of process creation.</p> <p>This changes the placement boundary. Instead of creating a task and repairing its cgroup membership afterward, the caller identifies the destination before the child exists.</p>