From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E327422157B; Mon, 17 Aug 2026 07:26:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786951573; cv=none; b=j/nHujYg+5OmlM2Hwx/QZZneNslwWe/FWMgDnqraGF0vKfhf8grIfH4OR04026QOnx+fG/BFJAC1hgn7FOm2s0lrqO0ABPflGmmgDvVfmJemiOI8Q7OEzV3lXLk5D0YLph15zw+klHMZVCE0zbkLowBQFP1QnpVoGXwGCn5GvRw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786951573; c=relaxed/simple; bh=zhMhv8QzU8Vtj3i+L7/sNzyq9s/r+Rp9rCx8UgcqRRA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Y8MiD/FhRHV3/8zn7JHxFwdVo+xxe3lB0TWiLeLU/8y3bnirQ521C6Jd5WOfbubwGjdu1CDJMmBIWOuFEvron+KILrhuKdbF+qT4OVGh3zz4xcIg/SiKcaYOBNL6Ojd+PWuXUJ2Zn5KNvFRe7VipKQ1CV7KwogitAoCxVXHdG6s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TPVwsH0+; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="TPVwsH0+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2E231F000E9; Mon, 17 Aug 2026 07:26:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786951572; bh=jx/fJHlv+TyqL14DjIYnpch16uX3FqMcscjcOmZZRMI=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=TPVwsH0+yYuF5dCUWAaOeLMTyhwWvDtbJxenguD4vGcYaOy7OeWd5GLCdI1b8Zztc LnyRlbBg71hEc/bvOnKGUzR+PNnHGJ4+544wktNjY5KPjH/tUfM5XMzQ5O53/Myb8n j0J6bjOq3D3TRBSWgxFXiGP7eGDL85OXT6oqW6CPWag0wOCtLnh1EtOAcbFDIky4Nz JmIDBa4yD2kBN9rZC0eNk0wP1Pi5xwce+grNtntwZp3WNBqKiyA8ks2YPW12J2KVbE x6bS88gfmJ6WjulOI9SsamrKv+qZw+NEvCdOJcFJLGREEjdDtU4PY79DDYGc2sv4ks s4ZDE9DRz7TNw== Message-ID: <7cc71fbf-425e-4047-94c5-3f06d3ed8905@kernel.org> Date: Mon, 17 Aug 2026 09:26:06 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v13 0/3] perf: Add Raspberry Pi AXI PMU driver To: Ian Rogers Cc: florian.fainelli@broadcom.com, linux-perf-users@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, pbrobinson@gmail.com References: <20260815082048.4043217-1-irogers@google.com> <20260815172712.50119-1-irogers@google.com> <4998d0ca-eeb0-4b04-b3ac-a1f97c1829f2@kernel.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 17/08/2026 08:57, Ian Rogers wrote: > On Sun, Aug 16, 2026 at 11:20 PM Krzysztof Kozlowski wrote: >> >> On 15/08/2026 19:27, Ian Rogers wrote: >>> Motivation & Background >>> ============================== >>> Currently, Linux lacks a standard perf-API compatible driver for the >>> Broadcom AXI performance counter blocks on Raspberry Pi platforms. Prior >>> out-of-tree vendor solutions relied on custom debugfs nodes and ad-hoc >>> kthreads, preventing integration with standard Linux perf tooling (`perf stat`, >>> `perf list`, etc.). >>> >> >> Slow down! >> >> One version per 24h in normal cycle, not 13 patchsets in two days! (and >> even rarer during the merge window) > > I'm familiar with perf-tools which was set up to follow BPF's example, > both have -next repos. The -next repos merge into linux-next for > testing. I agree that cherry-picking shouldn't be done straight into a > pull request to Linus. Is there a principle against using -next and > linux-next? How is this relevant? I don't think you read my comment. Best regards, Krzysztof