From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 685FD42464F; Thu, 16 Jul 2026 13:02:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784206945; cv=none; b=jwodrA3PQq/ed+a7SYpZ9xqXvATnGPPv5M4v5zh3Sm6XaHIF7nnohDtmfUw7XbP9zfeNV7Q3pt44yhzmGZg77QKeJrooR4r7HYFfh1pZ+Hd9uI4D0BgKlHXhzHEw3kTKhLMcUGsnm+Cfssr9xBP5zi1QAQqTX9KxpTIxPCoNtgI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784206945; c=relaxed/simple; bh=Ze6s8VdThzGMKrBXTB45qXX1AQcVO7v31NBdMfIgdBY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=HTf/KeWOYXJbTY0u8hJL6miARw5BThUgb5R//F0p02ExE2wyrB+JI02PWjX9cdrIwEHXiazi59A8Qxq7sYFM7odtB6J80hestEYzdCXuNmSn7gd0dxAN2VmyE05K5SBbHIuUHGzlabBC2GPrrrmUPhIyTrY9kx/j1ceX453RYoU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=Vh9bdtuO; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=R+EEOa4y; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="Vh9bdtuO"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="R+EEOa4y" Date: Thu, 16 Jul 2026 15:02:16 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1784206937; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=48Pb7U8ibySN14Dj/pl8Cx7cjOEGZ2zMu05jsQsKM+A=; b=Vh9bdtuOLHGEhBdj2vTV+zUgTW8lsBBiYBtFhDAqU6WmqjFsM9FJ3ll4/Hjum27/4hZjgW im24923HJ8eWWpmxPkUFT90hXa5o1pv4Tba+gdzqOCE28u4QOmA0wkKnUweeF2La39puiJ 1xbNi67K51+lFx1W8rOmsEmYgreN4K7THCW9MNIHjBT82zzp5NRSJlgFqC4FibzRlzHnX3 thh82/5hCCbnkJrSArks511bkxO5Rn4wyo8Bt14/cVKZvrtpG5+FQ7mmvRIfvRBLMwI0PJ vpHLq01FR7oMQX3iTSH3eoY8l8OM2bzlGH/bZ2PoC2MLi0CBbULB26MeCOZ9jQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1784206937; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=48Pb7U8ibySN14Dj/pl8Cx7cjOEGZ2zMu05jsQsKM+A=; b=R+EEOa4yQxPebApQUs9azfnyy8vnXDcibchXjEzehysrQ2PEhWVmqrsya2d5bY2NuDelAq KsS+mJazDrpFFdCg== From: Sebastian Andrzej Siewior To: Clark Williams Cc: Florian Bezdeka , Steven Rostedt , Greg Kroah-Hartman , driver-core@lists.linux.dev, linux-rt-devel@lists.linux.dev, linux-rt-users@vger.kernel.org, "Rafael J. Wysocki" , Arnd Bergmann , Clark Williams , Danilo Krummrich , Peter Zijlstra , Clark Williams , Thomas Gleixner , Jan Kiszka Subject: Re: [RFC PATCH] sysfs: Add /sys/kernel/realtime entry Message-ID: <20260716130216.dTmk8kCQ@linutronix.de> References: <20260709143108.UYeCUUcd@linutronix.de> <2026070922-kilowatt-matador-5e1c@gregkh> <20260709152214.rH1O_8SM@linutronix.de> <748a489687000b21d0e8f961fc2f9f963b0bc1d1.camel@siemens.com> <20260710115145.32729a7c@gandalf.local.home> <20260714110718.E5qV5-Hf@linutronix.de> Precedence: bulk X-Mailing-List: driver-core@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: On 2026-07-15 12:18:21 [-0500], Clark Williams wrote: > > Clark, what is the status on your end? > > > > I still carry it in v6.1-rt and v6.6-rt and don't really see a reason > not to. I don't believe it's a security risk since a write to > /sys/kernel/realtime gets ignored; it's just there to say that this is a > PREEMPT_RT kernel. > > So, I'm ambivalent on the keep or drop question. I'll go ahead and clean > up what I'm carrying in v6.1-rt and v6.6-rt and if we decide to keep it > I'll send you the updated changes. I'm not suggesting to drop it from existing stable trees. It is just, if there is no wider audience asking for it and reasoning why, I will drop it from my queue and not submit it upstream. I just don't want do it quietly. In https://lore.kernel.org/all/ak_GDsJS6kVoUM2f@lysander/ you mentioned that it was needed in the past. If that requirement is gone and everyone can live without it, I see no reason to pursue it ;) > Clark > Sebastian