Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Mon, 11 Jan 2021 15:04:05 +0100
From:   Peter Zijlstra <peterz@infradead.org>
To:     Qais Yousef <qais.yousef@arm.com>
Cc:     Phil Auld <pauld@redhat.com>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        vincent.donnefort@arm.com, mingo@redhat.com,
        vincent.guittot@linaro.org, linux-kernel@vger.kernel.org,
        valentin.schneider@arm.com
Subject: Re: [PATCH v2] sched/debug: Add new tracepoint to track cpu_capacity
Message-ID: <X/xa1WBqu8ZOl5QD@hirez.programming.kicks-ass.net>
References: <1598605249-72651-1-git-send-email-vincent.donnefort@arm.com>
 <20200828102724.wmng7p6je2pkc33n@e107158-lin.cambridge.arm.com>
 <1e806d48-fd54-fd86-5b3a-372d9876f360@arm.com>
 <20200828172658.dxygk7j672gho4ax@e107158-lin.cambridge.arm.com>
 <58f5d2e8-493b-7ce1-6abd-57705e5ab437@arm.com>
 <20200902135423.GB93959@lorien.usersys.redhat.com>
 <20200907110223.gtdgqod2iv2w7xmg@e107158-lin.cambridge.arm.com>
 <20200908131954.GA147026@lorien.usersys.redhat.com>
 <20210104182642.xglderapsfrop6pi@e107158-lin>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20210104182642.xglderapsfrop6pi@e107158-lin>
Precedence: bulk

On Mon, Jan 04, 2021 at 06:26:42PM +0000, Qais Yousef wrote:

> So I have a proper patch for that now, that actually turned out to be really
> tiny once you untangle exactly what is missing.
> 
> Peter, bpf programs aren't considered ABIs AFAIK, do you have concerns about
> that?

In order to use these you need to rely on BTF to get anything useful
done right? And anything that relies on BTF cannot be ABI.