linux-kernel - Re: [PATCH v3 bpf-next 4/4] selftests/bpf: add auto-detach test

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Message-ID: <20190523234254.GA17907@tower.DHCP.thefacebook.com>
Date:   Thu, 23 May 2019 23:43:00 +0000
From:   Roman Gushchin <guro@...com>
To:     Yonghong Song <yhs@...com>
CC:     Alexei Starovoitov <ast@...nel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        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 v3 bpf-next 4/4] selftests/bpf: add auto-detach test

On Thu, May 23, 2019 at 04:09:30PM -0700, Yonghong Song wrote:
> 
> 
> On 5/23/19 12:45 PM, Roman Gushchin wrote:
> > Add a kselftest to cover bpf auto-detachment functionality.
> > The test creates a cgroup, associates some resources with it,
> > attaches a couple of bpf programs and deletes the cgroup.
> > 
> > Then it checks that bpf programs are going away in 5 seconds.
> > 
> > Expected output:
> >    $ ./test_cgroup_attach
> >    #override:PASS
> >    #multi:PASS
> >    #autodetach:PASS
> >    test_cgroup_attach:PASS
> > 
> > On a kernel without auto-detaching:
> >    $ ./test_cgroup_attach
> >    #override:PASS
> >    #multi:PASS
> >    #autodetach:FAIL
> >    test_cgroup_attach:FAIL
> > 
> > Signed-off-by: Roman Gushchin <guro@...com>
> 
> Looks good to me. It will be good if you can add test_cgroup_attach
> to .gitignore to avoid it shows up in `git status`. With that,

I don't think it deserves a new version, I'll prepare a separate patch
for it.

> 
> Acked-by: Yonghong Song <yhs@...com>

Thank you for the review!