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From: Jakub Sitnicki <jakub@cloudflare.com>
To: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc: bpf <bpf@vger.kernel.org>, Networking <netdev@vger.kernel.org>,
	kernel-team@cloudflare.com
Subject: Re: [PATCH bpf-next v5 12/12] selftests/bpf: Tests for SOCKMAP holding listening sockets
Date: Wed, 11 Mar 2020 20:49:47 +0100	[thread overview]
Message-ID: <87sgiey8mc.fsf@cloudflare.com> (raw)
In-Reply-To: <CAEf4Bzadh2T43bYbLO0EuKceUKr3SkfXK8Tj_fXFNj8BWtot1Q@mail.gmail.com>

On Wed, Mar 11, 2020 at 07:48 PM CET, Andrii Nakryiko wrote:
> On Mon, Jan 27, 2020 at 4:58 AM Jakub Sitnicki <jakub@cloudflare.com> wrote:
>>
>> Now that SOCKMAP can store listening sockets, user-space and BPF API is
>> open to a new set of potential pitfalls. Exercise the map operations (with
>> extra attention to code paths susceptible to races between map ops and
>> socket cloning), and BPF helpers that work with SOCKMAP to gain confidence
>> that all works as expected.
>>
>> Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
>> ---
>>  .../selftests/bpf/prog_tests/sockmap_listen.c | 1455 +++++++++++++++++
>>  .../selftests/bpf/progs/test_sockmap_listen.c |   77 +
>>  2 files changed, 1532 insertions(+)
>>  create mode 100644 tools/testing/selftests/bpf/prog_tests/sockmap_listen.c
>>  create mode 100644 tools/testing/selftests/bpf/progs/test_sockmap_listen.c
>>
>
> Hey Jakub!
>
> I'm frequently getting spurious failures for sockmap_listen selftest.
> We also see that in libbpf's Github CI testing as well. Do you mind
> taking a look? Usually it's the following kinds of error:
>
> ./test_progs:connect_accept_thread:733: accept: Resource temporarily unavailable
> connect_accept_thread:FAIL:733

Hey Andrii,

Sorry about that. Will investigate why this is happening.

Can't say I've seen those. Any additional details about the test
enviroment would be helpful. Like the kernel build config and qemu
params (e.g. 1 vCPU vs more).

I've taken a quick look at Github CI [0] to see if I can find a sample
failure report and fish out the kernel config & VM setup from the test
job spec, but didn't succeed. Will dig more later, unless you have a
link handy?

Thanks,
-jkbs

[0] https://travis-ci.org/github/libbpf/libbpf

  reply	other threads:[~2020-03-11 19:49 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-27 12:55 [PATCH bpf-next v5 00/12] Extend SOCKMAP to store listening sockets Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 01/12] bpf, sk_msg: Don't clear saved sock proto on restore Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 02/12] net, sk_msg: Annotate lockless access to sk_prot on clone Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 03/12] net, sk_msg: Clear sk_user_data pointer on clone if tagged Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 04/12] tcp_bpf: Don't let child socket inherit parent protocol ops on copy Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 05/12] bpf, sockmap: Allow inserting listening TCP sockets into sockmap Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 06/12] bpf, sockmap: Don't set up sockmap progs for listening sockets Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 07/12] bpf, sockmap: Return socket cookie on lookup from syscall Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 08/12] bpf, sockmap: Let all kernel-land lookup values in SOCKMAP Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 09/12] bpf: Allow selecting reuseport socket from a SOCKMAP Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 10/12] net: Generate reuseport group ID on group creation Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 11/12] selftests/bpf: Extend SK_REUSEPORT tests to cover SOCKMAP Jakub Sitnicki
2020-01-27 12:55 ` [PATCH bpf-next v5 12/12] selftests/bpf: Tests for SOCKMAP holding listening sockets Jakub Sitnicki
2020-03-11 18:48   ` Andrii Nakryiko
2020-03-11 19:49     ` Jakub Sitnicki [this message]
2020-03-11 21:02       ` Andrii Nakryiko
2020-03-12 17:25         ` Jakub Sitnicki
2020-01-27 13:01 ` [PATCH bpf-next v5 00/12] Extend SOCKMAP to store " Jakub Sitnicki
2020-01-27 13:05 ` Jakub Sitnicki

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