Allow skipping oom_score_adj write via ACTIONS_RUNNER_DISABLE_OOM_SCORE_ADJ env var#4478
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biagiopietro wants to merge 2 commits into
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Allow skipping oom_score_adj write via ACTIONS_RUNNER_DISABLE_OOM_SCORE_ADJ env var#4478biagiopietro wants to merge 2 commits into
biagiopietro wants to merge 2 commits into
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…RE_ADJ env var Unprivileged containerized runners (e.g. ARC on Kubernetes) cannot write to /proc/<pid>/oom_score_adj and raise System.UnauthorizedAccessException. Setting ACTIONS_RUNNER_DISABLE_OOM_SCORE_ADJ=true (or =1) suppresses the write entirely so operators are not flooded with access-denied exceptions when they know the container is already securely isolated.
marcelosinhorini-jet
approved these changes
Jun 4, 2026
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Summary
ACTIONS_RUNNER_DISABLE_OOM_SCORE_ADJenvironment variable (acceptstrueor1) to suppress writes to/proc/<pid>/oom_score_adj;procfsand receivesSystem.UnauthorizedAccessExceptionon every spawned process;Verbosetrace is emitted so operators can confirm the skip is active.Test plan
OomScoreAdjIsWriten_Default,OomScoreAdjIsWriten_FromEnv, andOomScoreAdjIsInheritedtests continue to pass (no env var set → behaviour unchanged)OomScoreAdjIsSkipped_WhenDisableEnvVarSettest: setsACTIONS_RUNNER_DISABLE_OOM_SCORE_ADJ=true, runs a child process, and asserts itsoom_score_adjequals the parent's value (i.e. no write occurred)UnauthorizedAccessExceptionis raised when the variable is setLinked issues