netdev - Re: [PATCH bpf v2] selftests/bpf: skip nmi test when perf hw events are disabled

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Date:   Tue, 16 Jul 2019 07:57:04 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Ilya Leoshkevich <iii@...ux.ibm.com>
Cc:     bpf <bpf@...r.kernel.org>, Networking <netdev@...r.kernel.org>,
        gor@...ux.ibm.com, heiko.carstens@...ibm.com,
        Y Song <ys114321@...il.com>
Subject: Re: [PATCH bpf v2] selftests/bpf: skip nmi test when perf hw events
 are disabled

On Tue, Jul 16, 2019 at 3:56 AM Ilya Leoshkevich <iii@...ux.ibm.com> wrote:
>
> Some setups (e.g. virtual machines) might run with hardware perf events
> disabled. If this is the case, skip the test_send_signal_nmi test.
>
> Add a separate test involving a software perf event. This allows testing
> the perf event path regardless of hardware perf event support.
>
> Signed-off-by: Ilya Leoshkevich <iii@...ux.ibm.com>
> ---

LGTM!

Acked-by: Andrii Nakryiko <andriin@...com>

>
> v1->v2: Skip the test instead of using a software event.
> Add a separate test with a software event.
>
>  .../selftests/bpf/prog_tests/send_signal.c    | 33 ++++++++++++++++++-
>  1 file changed, 32 insertions(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/bpf/prog_tests/send_signal.c b/tools/testing/selftests/bpf/prog_tests/send_signal.c
> index 67cea1686305..54218ee3c004 100644
> --- a/tools/testing/selftests/bpf/prog_tests/send_signal.c
> +++ b/tools/testing/selftests/bpf/prog_tests/send_signal.c
> @@ -173,6 +173,18 @@ static int test_send_signal_tracepoint(void)
>         return test_send_signal_common(&attr, BPF_PROG_TYPE_TRACEPOINT, "tracepoint");
>  }
>

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