From patchwork Tue May 27 12:59:10 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shashank Balaji X-Patchwork-Id: 892890 Received: from jpms-ob01.noc.sony.co.jp (jpms-ob01.noc.sony.co.jp [211.125.140.164]) (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 4BB8B27144E; Tue, 27 May 2025 13:00:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=211.125.140.164 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748350824; cv=none; b=FfaLS6cPoEKmbIejWTZCpR+IZZwLbk0bxf0p6ZqCo5yw0XWioa9vdJbDOUWp0+30OR/kwYo9ovcbYNTlognySqRfRvpvQ/QT1FsasGteRUOpeCctsW9yOnPlRDqYBf0AQR9np2BRCRUB8VD2Tel3DNifKl5FTXvZxrokPBDjQ8Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748350824; c=relaxed/simple; bh=MEqM4vWFkkhwqxSh+gqQSgVUNNIX+HgRMV/7LAhpF48=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=p6aqrcWCBJDP3DRcm5bH2LOQGNGNLf8gQVsOVaQigUvL5E5uYR5PbLMpBzU5hyn7RZGG2loaGVGUZV+xCoInu7qxyAPD52zp1nMhdJTuRBKawOWGbt1I8W5ZP58HFnC3l8weNtoiUwRTQ7IxNj/MINcC4LKK4VEyCzRl+if4nnU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sony.com; spf=pass smtp.mailfrom=sony.com; dkim=pass (2048-bit key) header.d=sony.com header.i=@sony.com header.b=IVNUtryi; arc=none smtp.client-ip=211.125.140.164 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sony.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sony.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sony.com header.i=@sony.com header.b="IVNUtryi" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sony.com; s=s1jp; t=1748350822; x=1779886822; h=from:date:subject:mime-version:content-transfer-encoding: message-id:references:in-reply-to:to:cc; bh=+Lxgs3He9IdDt6ifvL+tC57fCEzAPriv444VErqusZI=; b=IVNUtryiJWuouNq1l0dQWIl/runxMaBydXiYlrJSEXphR3/1hD1B7sF6 zN6VeF+lC7dPgt2LRM3dd/iD8jxFZXFiQ59ghmfzEcN8i/RCAdId6TXuE dzEaJHe40b2Atwv/saw2RCvF5YdCJppegipAoES58vWdJSb3kNVG6CSN7 zvHYiL64XzsGFkknEGckoaabfdm4CstWBP9tK6Y3HlIcjZsVc3VC6m7Cb 9vgH12h7NgtHA4MoU+uK5/0L0qiMjh+at3iDKwnCuY3lEr6mMUsHbhPiG /pvxP9IKK7qGgtorUsIZ0CgZZFnNI3fsh9bkrNU/oYekU8Li2w0YHAI5H g==; Received: from unknown (HELO jpmta-ob1.noc.sony.co.jp) ([IPv6:2001:cf8:0:6e7::6]) by jpms-ob01.noc.sony.co.jp with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 May 2025 22:00:14 +0900 X-IronPort-AV: E=Sophos;i="6.15,318,1739804400"; d="scan'208";a="564893580" Received: from unknown (HELO [127.0.1.1]) ([IPv6:2001:cf8:1:573:0:dddd:6b3e:119e]) by jpmta-ob1.noc.sony.co.jp with ESMTP; 27 May 2025 22:00:14 +0900 From: Shashank Balaji Date: Tue, 27 May 2025 21:59:10 +0900 Subject: [PATCH v2 2/2] cpufreq, docs: userspace: mention variation in freq due to hw coordination Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250527-userspace-governor-doc-v2-2-0e22c69920f2@sony.com> References: <20250527-userspace-governor-doc-v2-0-0e22c69920f2@sony.com> In-Reply-To: <20250527-userspace-governor-doc-v2-0-0e22c69920f2@sony.com> To: "Rafael J. Wysocki" , Viresh Kumar , Jonathan Corbet Cc: linux-pm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Shinya Takumi , 20250522-userspace-governor-doc-v1-1-c8a038e39084@sony.com, Shashank Balaji X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1009; i=shashank.mahadasyam@sony.com; h=from:subject:message-id; bh=MEqM4vWFkkhwqxSh+gqQSgVUNNIX+HgRMV/7LAhpF48=; b=owGbwMvMwCV2mPH4Ij++H1mMp9WSGDJMt8d+ezrz5p8Zc4++XMZS2b/l46ZnVzqZFF0tTO+7p Ggu3qPZ31HKwiDGxSArpsjyTmbdhYNWlk1fjzN8g5nDygQyhIGLUwAm0u/N8Fcwk+PKRIbawypr JXyvf/0qVhKaJFW0UlZkhxjz9YjF7dGMDOuEvr7/d2yVp/uUvpwjCbdsHwcuu+NSv2j1mwkVM1g /7WcDAA== X-Developer-Key: i=shashank.mahadasyam@sony.com; a=openpgp; fpr=EE1CAED0C13A3982F5C700F6C301C7A24E0EF86A Signed-off-by: Shashank Balaji --- Documentation/admin-guide/pm/cpufreq.rst | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/admin-guide/pm/cpufreq.rst b/Documentation/admin-guide/pm/cpufreq.rst index 3950583f2b1549b27f568632547e22e9ef8bc167..30799f734ca5568002d790c1db0ced7454bbbc8d 100644 --- a/Documentation/admin-guide/pm/cpufreq.rst +++ b/Documentation/admin-guide/pm/cpufreq.rst @@ -398,7 +398,9 @@ policy limits change after that. This governor does not do anything by itself. Instead, it allows user space to set the CPU frequency for the policy it is attached to by writing to the -``scaling_setspeed`` attribute of that policy. +``scaling_setspeed`` attribute of that policy. Though the intention may be to +set an exact frequency for the policy, the actual frequency may vary depending +on hardware coordination, thermal and power limits, and other factors. ``schedutil`` -------------