From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=90.155.50.34 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793962209; b=yyOju/V9d0LlfmPKe21EPyRHin1IIQtjrp4VVKFVVypuDupEgHik+KbrQwtIVEFSjpIj o8A12Tks3TZoXL7bAltdbcDEUylcERWKD2R1a8XomoyrlT6UZh/1vcH8CyPcEjWDvvNVd ZIBJ4VI9LNbymtbMBZJMtMYXTu9DM4jcP8JPAbLkdE5B01/gcuzmUl6gLxDaEF9mIkJbl CVvUSDy5j5G9orz5zfqleTySj+ZPMLbD3waWHSZq0KRkaKs8f/gfmGC3kEY/wagGhYRtf 4pidWhqHtY0Bqs70PJM7Tt61wclzgzBI8vhk44YLkqr6pchhh+uWtYBN9cK4/7HHcMQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793962209; h=DMARC-Filter:DKIM-Signature:Received:Received:Date:From:To:Cc: Subject:Message-ID:References:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; bh=xYW39RZi6BQZ7wB7I4RRp3gBwQGPXTwbaw7HbZN2BsI=; b=oOsiNTwS7I9lbRKxrgoonRf0EcgG12BbRuTewFnlOBdW5h+W70vj8STH7OETEp7JhS6j anKSeE46C01ArcUQX0FMJZdQAKeftqQWHnsCfK6BZhQPr2kw7v0NhmZ8Hdp9OD9dpiiiG zzJ3E9IWn1I4xOu/ZhfEPgaZHrhYb/cop2eqh0wddos8x9xTEfuyA9GCp6rHgZoLV9/yh ILpqi7kVvX+WqM2FZgkX8hZER1jKMk3zvvWTQ6a6mnpfM0c2slIP+pdR8iCj7/KxUBuoX /jpd9qSRnc9PT2GvuHQnKkkP/lrkMoCII7buX2swz1HU/6N/YNiX8fuWw3fobg0kjMg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=infradead.org; spf=pass smtp.mailfrom=infradead.org; dkim=pass header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=casper.20170209 header.b=poBvO1j7; arc=none smtp.remote-ip=90.155.50.34 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB582606EEAC; Fri, 6 Nov 2026 10:50:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org EB582606EEAC Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=casper.20170209 header.b=poBvO1j7 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=xYW39RZi6BQZ7wB7I4RRp3gBwQGPXTwbaw7HbZN2BsI=; b=poBvO1j7MwZvUIGsLTn3iJCmx/ CSuYqhq//CeM0atUd9aOwTyvnO52sxlX/0pRX7c2Ot1CP3q4viXf3nFpCGIBHXD93M654Z0GncDYY 0s/1FckqirvBZN5ryvJADB/GI+hUbi2XTPmU3wwN8X5ZPmYswmFE/ZducjrM0jNSxIMj6rssVzP9m naSTva9/+9GWSpeTjIKwW9H2Kh5a3K+BKEQiwKWouEQlv379jB/f0yiHjPSVkzyaDpaWxCloZkqLM bonIjdGN2fblCQ1oVoKGBsT8yFdWAO0Gqy+F/n5vYu55b3XvzakgJpRQJXhk5siDP9j1z63fgygBZ pNqHHb5A==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.100.1 #2 (Red Hat Linux)) id 1xPHWF-000000039C3-3mMH; Fri, 06 Nov 2026 10:50:03 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 7DB0E300882; Fri, 06 Nov 2026 11:50:03 +0100 (CET) Date: Fri, 6 Nov 2026 11:50:03 +0100 From: Peter Zijlstra To: Sebastian Andrzej Siewior Cc: Tejun Heo , linux-rt-devel@lists.linux.dev, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Ingo Molnar , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , K Prateek Nayak , Johannes Weiner , Michal =?iso-8859-1?Q?Koutn=FD?= , John Ogness , Shrikanth Hegde , luca abeni , Yuri Andriaccio , Yuri Andriaccio Subject: Re: [PATCH] sched: Remove CONFIG_RT_GROUP_SCHED Message-ID: <20261106105003.GU1813469@noisy.programming.kicks-ass.net> References: <20261105164724.yxONBd03@linutronix.de> <20261105193010.tXUDDu2w@linutronix.de> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261105193010.tXUDDu2w@linutronix.de> On Thu, Nov 05, 2026 at 08:30:10PM +0100, Sebastian Andrzej Siewior wrote: > On 2026-11-05 07:19:27 [-1000], Tejun Heo wrote: > > Hello, Sebastian. > Hi Tejun, > > > > > I'm not against it but wonder whether it'd be useful to do it more gradually > > so that people can pipe up if they depend on it. ie. Mark it deprecated and > > put it behind EXPORT for a bit and then BROKEN before actual removal. > > I would be surprised if this is actually used especially since it is > cg-v1 and v2 is the default/ used by everyone (?). So I would love to actually delete this. But IIRC there were actually people who used it. But yes, we need to replace this with that other thing.