netdev - Re: [PATCH bpf 4/4] selftests: bpf: reset global state between reuseport test runs

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Date:   Thu, 23 Jan 2020 17:56:47 +0000
From:   Martin Lau <kafai@...com>
To:     Lorenz Bauer <lmb@...udflare.com>
CC:     Shuah Khan <shuah@...nel.org>, Alexei Starovoitov <ast@...nel.org>,
        "Daniel Borkmann" <daniel@...earbox.net>,
        Song Liu <songliubraving@...com>, "Yonghong Song" <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf 4/4] selftests: bpf: reset global state between
 reuseport test runs

On Thu, Jan 23, 2020 at 04:59:33PM +0000, Lorenz Bauer wrote:
> Currently, there is a lot of false positives if a single reuseport test
> fails. This is because expected_results and the result map are not cleared.
Ah, right.  An earlier test failure has ripple effect on the following tests.

I notice another embarrassing typo.  Can you also make this change in this fix?

-static enum result expected_results[NR_RESULTS];
+static __u32 expected_results[NR_RESULTS];

> 
> Zero both after individual test runs, which fixes the mentioned false
> positives.
Thanks for the fix!

Acked-by: Martin KaFai Lau <kafai@...com>