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SubjectRe: [PATCH v2 1/1] selftests: vm: add process_mrelease tests
On Mon, 16 May 2022 00:55:38 -0700 Suren Baghdasaryan <surenb@google.com> wrote:

> Introduce process_mrelease syscall sanity tests which include tests
> which expect to fail:
> - process_mrelease with invalid pidfd and flags inputs
> - process_mrelease on a live process with no pending signals
> and valid process_mrelease usage which is expected to succeed.
> Because process_mrelease has to be used against a process with a pending
> SIGKILL, it's possible that the process exits before process_mrelease
> gets called. In such cases we retry the test with a victim that allocates
> twice more memory up to 1GB. This would require the victim process to
> spend more time during exit and process_mrelease has a better chance of
> catching the process before it exits and succeeding.
>
> On success the test reports the amount of memory the child had to
> allocate for reaping to succeed. Sample output:
> Success reaping a child with 1MB of memory allocations
>
> On failure the test reports the failure. Sample outputs:
> All process_mrelease attempts failed!
> process_mrelease: Invalid argument
>
> ...
>
> --- a/tools/testing/selftests/vm/run_vmtests.sh
> +++ b/tools/testing/selftests/vm/run_vmtests.sh
> @@ -287,6 +287,22 @@ else
> echo "[PASS]"
> fi
>
> +echo "---------------------"
> +echo "running mrelease_test"
> +echo "---------------------"
> +./mrelease_test
> +ret_val=$?
> +
> +if [ $ret_val -eq 0 ]; then
> + echo "[PASS]"
> +elif [ $ret_val -eq $ksft_skip ]; then
> + echo "[SKIP]"
> + exitcode=$ksft_skip
> +else
> + echo "[FAIL]"
> + exitcode=1
> +fi
> +
> echo "-------------------"
> echo "running mremap_test"
> echo "-------------------"

Can you please redo this against
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm branch mm-stable
or mm-unstable. Or against linux-next?

This script now has a helper function run_test which I think can be
used here.

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