netdev - Re: [PATCH bpf-next v3 00/27] bpf: RLIMIT

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Message-ID: <CALOAHbB2tsrcx5LZbrxJ8LZQW7dSCrD7ErKx4HRXj2i29Pq9Ew@mail.gmail.com>
Date:   Wed, 6 Apr 2022 22:32:02 +0800
From:   Yafang Shao <laoar.shao@...il.com>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     Andrii Nakryiko <andrii@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin Lau <kafai@...com>, Song Liu <songliubraving@...com>,
        Yonghong Song <yhs@...com>,
        john fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Shuah Khan <shuah@...nel.org>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>
Subject: Re: [PATCH bpf-next v3 00/27] bpf: RLIMIT_MEMLOCK cleanups

On Wed, Apr 6, 2022 at 4:53 AM Andrii Nakryiko
<andrii.nakryiko@...il.com> wrote:
>
> On Tue, Apr 5, 2022 at 6:09 AM Yafang Shao <laoar.shao@...il.com> wrote:
> >
> > We have switched to memcg based memory accouting and thus the rlimit is
> > not needed any more. LIBBPF_STRICT_AUTO_RLIMIT_MEMLOCK was introduced in
> > libbpf for backward compatibility, so we can use it instead now.
> >
> > This patchset cleanups the usage of RLIMIT_MEMLOCK in tools/bpf/,
> > tools/testing/selftests/bpf and samples/bpf. The file
> > tools/testing/selftests/bpf/bpf_rlimit.h is removed. The included header
> > sys/resource.h is removed from many files as it is useless in these files.
> >
> > - v3: Get rid of bpf_rlimit.h and fix some typos (Andrii)
> > - v2: Use libbpf_set_strict_mode instead. (Andrii)
> > - v1: https://lore.kernel.org/bpf/20220320060815.7716-2-laoar.shao@gmail.com/
> >
> > Yafang Shao (27):
> >   bpf: selftests: Use libbpf 1.0 API mode instead of RLIMIT_MEMLOCK in
> >     xdping
> >   bpf: selftests: Use libbpf 1.0 API mode instead of RLIMIT_MEMLOCK in
> >     xdpxceiver
> >   bpf: selftests: No need to include bpf_rlimit.h in test_tcpnotify_user
> >   bpf: selftests: No need to include bpf_rlimit.h in flow_dissector_load
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in
> >     get_cgroup_id_user
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in
> >     test_cgroup_storage
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in
> >     get_cgroup_id_user
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in test_lpm_map
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in test_lru_map
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in
> >     test_skb_cgroup_id_user
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in test_sock_addr
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in test_sock
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in test_sockmap
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in test_sysctl
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in test_tag
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in
> >     test_tcp_check_syncookie_user
> >   bpf: selftests: Set libbpf 1.0 API mode explicitly in
> >     test_verifier_log
> >   bpf: samples: Set libbpf 1.0 API mode explicitly in hbm
> >   bpf: selftests: Get rid of bpf_rlimit.h
> >   bpf: selftests: No need to include sys/resource.h in some files
> >   bpf: samples: Use libbpf 1.0 API mode instead of RLIMIT_MEMLOCK in
> >     xdpsock_user
> >   bpf: samples: Use libbpf 1.0 API mode instead of RLIMIT_MEMLOCK in
> >     xsk_fwd
> >   bpf: samples: No need to include sys/resource.h in many files
> >   bpf: bpftool: Remove useless return value of libbpf_set_strict_mode
> >   bpf: bpftool: Set LIBBPF_STRICT_AUTO_RLIMIT_MEMLOCK for legacy libbpf
> >   bpf: bpftool: remove RLIMIT_MEMLOCK
> >   bpf: runqslower: Use libbpf 1.0 API mode instead of RLIMIT_MEMLOCK
> >
>
> Hey Yafang, thanks for the clean up! It looks good, but please make it
> a bit more manageable in terms of number of patches. There is no need
> to have so many tiny patches. Can you squash together all the
> samples/bpf changes into one patch, all the selftests/bpf changes into
> another, bpftool ones still can be just one patch. runqslower makes
> sense to keep separate. Please also use customary subject prefixes for
> those: "selftests/bpf: ", "bpftool: ", "samples/bpf: ". For runqslower
> probably "tools/runqslower: " would be ok as well.
>

Thanks for your suggestion. I will change it.

-- 
Thanks
Yafang