[LTP] shell: add optional OOM protection

[linuxtestproject.agent@gmail.com]

Hi Andrea,

On Mon, Jul 13 2026, Andrea Cervesato <andrea.cervesato@suse.com> wrote:
> shell: add optional OOM protection

--- [PATCH 1/2] ---

> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0-or-later
> +# Copyright (c) 2026 Linux Test Project
> +
> +TST_TESTFUNC=test
> +TST_OOM_PROTECTION=1

The new test is missing both the mandatory doc block and the mandatory env
block. All other tests in testcases/lib/tests/ carry them (e.g.
shell_loader.sh, shell_loader_cleanup.sh). Add at minimum:

  # ---
  # doc
  # Verify that TST_OOM_PROTECTION shields the shell harness from the OOM
  # killer and resets the test process oom_score_adj to 0.
  # ---
  #
  # ---
  # env
  # {
  # }
  # ---

> +TST_TESTFUNC=test

Is naming the test function "test" intentional? "test" is a POSIX shell
builtin and a standalone utility; shell-tests.md forbids naming functions
after common shell commands. Rename to e.g. "do_test" and update
TST_TESTFUNC accordingly.

> +. tst_test.sh
> +tst_run

Every other test in testcases/lib/tests/ uses the ". tst_loader.sh" /
". tst_run.sh" pattern. This test uses the pure-shell harness directly.
Is that because tst_loader.sh goes through the C binary (tst_run_shell)
and therefore never exercises the OOM protection that lives in tst_test.sh?

If so, can the test still be brought into the standard structure, or does
this require the OOM protection to be moved into the C backend first?

Verdict - Needs revision

Pre-existing issues:
  testcases/kernel/controllers/memcg/stress/memcg_stress_test.sh uses
  TST_TESTFUNC=test (function named after shell builtin); it also lacks
  doc/env blocks. These pre-date this series.

---
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