From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH v2] perf stat: Support old kernels for bperf cgroup
 counting
Date: Tue, 11 Oct 2022 06:53:43 -1000
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Sender: Tejun Heo <htejun@gmail.com>
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To: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>, Zefan Li <lizefan.x@bytedance.com>, Johannes Weiner <hannes@cmpxchg.org>, cgroups@vger.kernel.org, Jiri Olsa <jolsa@kernel.org>, LKML <linux-kernel@vger.kernel.org>, linux-perf-users@vger.kernel.org, Song Liu <songliubraving@fb.com>, bpf@vger.kernel.org, Andrii Nakryiko <andrii@kernel.org>

On Mon, Oct 10, 2022 at 10:28:08PM -0700, Namhyung Kim wrote:
> The recent change in the cgroup will break the backward compatiblity in
> the BPF program.  It should support both old and new kernels using BPF
> CO-RE technique.
> 
> Like the task_struct->__state handling in the offcpu analysis, we can
> check the field name in the cgroup struct.
> 
> Acked-by: Jiri Olsa <jolsa@kernel.org>
> Acked-by: Andrii Nakryiko <andrii@kernel.org>
> Signed-off-by: Namhyung Kim <namhyung@kernel.org>

Applied to cgroup/for-6.1-fixes.

Thanks.

-- 
tejun