netdev - Re: [PATCH bpf-next v2 6/8] cgroup: bpf: enable bpf programs to integrate with rstat

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Message-ID: <1c1fb651-cc69-4b5c-1b68-8f29908794bc@fb.com>
Date:   Mon, 27 Jun 2022 23:12:12 -0700
From:   Yonghong Song <yhs@...com>
To:     Yosry Ahmed <yosryahmed@...gle.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Hao Luo <haoluo@...gle.com>,
        Tejun Heo <tj@...nel.org>, Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Shuah Khan <shuah@...nel.org>, Michal Hocko <mhocko@...nel.org>
Cc:     Roman Gushchin <roman.gushchin@...ux.dev>,
        David Rientjes <rientjes@...gle.com>,
        Stanislav Fomichev <sdf@...gle.com>,
        Greg Thelen <gthelen@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, cgroups@...r.kernel.org
Subject: Re: [PATCH bpf-next v2 6/8] cgroup: bpf: enable bpf programs to
 integrate with rstat



On 6/10/22 12:44 PM, Yosry Ahmed wrote:
> Enable bpf programs to make use of rstat to collect cgroup hierarchical
> stats efficiently:
> - Add cgroup_rstat_updated() kfunc, for bpf progs that collect stats.
> - Add cgroup_rstat_flush() kfunc, for bpf progs that read stats.
> - Add an empty bpf_rstat_flush() hook that is called during rstat
>    flushing, for bpf progs that flush stats to attach to. Attaching a bpf
>    prog to this hook effectively registers it as a flush callback.
> 
> Signed-off-by: Yosry Ahmed <yosryahmed@...gle.com>

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