netdev - Re: [PATCH v2 bpf-next 0/4] cgroup bpf auto-detachment

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Date:   Thu, 23 May 2019 05:17:05 +0000
From:   Yonghong Song <yhs@...com>
To:     Roman Gushchin <guro@...com>, Alexei Starovoitov <ast@...nel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>
CC:     Daniel Borkmann <daniel@...earbox.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Tejun Heo <tj@...nel.org>, Kernel Team <Kernel-team@...com>,
        "cgroups@...r.kernel.org" <cgroups@...r.kernel.org>,
        Stanislav Fomichev <sdf@...ichev.me>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 bpf-next 0/4] cgroup bpf auto-detachment



On 5/22/19 4:20 PM, Roman Gushchin wrote:
> This patchset implements a cgroup bpf auto-detachment functionality:
> bpf programs are attached as soon as possible after removal of the
typo here "attached" => "detached"?

> cgroup, without waiting for the release of all associated resources.
> 
> Patches 2 and 3 are required to implement a corresponding kselftest
> in patch 4.
> 
> v2:
>    1) removed a bogus check in patch 4
>    2) moved buf[len] = 0 in patch 2
> 
> 
> Roman Gushchin (4):
>    bpf: decouple the lifetime of cgroup_bpf from cgroup itself
>    selftests/bpf: convert test_cgrp2_attach2 example into kselftest
>    selftests/bpf: enable all available cgroup v2 controllers
>    selftests/bpf: add auto-detach test
> 
>   include/linux/bpf-cgroup.h                    |   8 +-
>   include/linux/cgroup.h                        |  18 +++
>   kernel/bpf/cgroup.c                           |  25 ++-
>   kernel/cgroup/cgroup.c                        |  11 +-
>   samples/bpf/Makefile                          |   2 -
>   tools/testing/selftests/bpf/Makefile          |   4 +-
>   tools/testing/selftests/bpf/cgroup_helpers.c  |  57 +++++++
>   .../selftests/bpf/test_cgroup_attach.c        | 145 ++++++++++++++++--
>   8 files changed, 243 insertions(+), 27 deletions(-)
>   rename samples/bpf/test_cgrp2_attach2.c => tools/testing/selftests/bpf/test_cgroup_attach.c (79%)
>