From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 CDAD31D8DFE; Tue, 7 Jan 2025 19:41:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736278874; cv=none; b=HXvBr6P+SPnxaiShskj9mSZJp2d6eKeb9RvUCJSL8DOZhM+V402hyIplUMUXcjBifgPBWgFABIgh5V77GrbAExwIOJ4qsNBOpwTCEYIAyrgQWgwNHbaJrENCpfx3S7/jw9S8YOp0SE2BeaOQVLupCcc95Ft/jZntguw6rlbI/l0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736278874; c=relaxed/simple; bh=RWn9cauNPe+Adxo/IKxLpNzTuXAJGNIEjmLPVz+OfQQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=t5/1sj0x8Cs/KQku9RuD3ruY7HI/Vx/kqQ3a0yNdR6/h5VAg3ggNi/kvUwmcjepLkaTSigAD8AagJzqUabsITTCte1uqf2+qWiGPtk8YYuMwErkknPOSIqsXNSnGIosfprMq3Z1YJUWKHu+gV9Q2uDOyQL6pvSRWVY9GEKNFRvs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=EDPTF/yZ; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="EDPTF/yZ" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Transfer-Encoding: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-ID:Content-Description; bh=RWn9cauNPe+Adxo/IKxLpNzTuXAJGNIEjmLPVz+OfQQ=; b=EDPTF/yZ6ibD/xji+qPGwIegAe Kqps3MGIiO2jZZH2eJtYVlWc4vJ3o9UYfum/gZdNgQZ9zi69W7qcYhwexU/OKXF8SGB29jrq+PUTA e05p+e8XQVbDPmss4vkbj1aOH8TEjGIVXCkggS9qGGJkwJxefNX2D+YFHgX+s+T4ymfjPQY5F1rkF mAGJ76kND4nwIhhyWG5oi7ntcnNJeKgprp5M2laRBf7V26tm9XH9vjWgdtwn2HGzH0a0+oy8/3FVU OjyWRqxFwi2sSOjY3NjSHjOBWRUrFgslaoh0aBhP7tmh/f4oY+b+s4VLKd/+RZu7ph4vEU6RnQsLl 23k2w0Sw==; Received: from 77-249-17-89.cable.dynamic.v4.ziggo.nl ([77.249.17.89] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.98 #2 (Red Hat Linux)) id 1tVFRq-00000008ffo-3JfG; Tue, 07 Jan 2025 19:41:07 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 9279630057A; Tue, 7 Jan 2025 20:41:06 +0100 (CET) Date: Tue, 7 Jan 2025 20:41:06 +0100 From: Peter Zijlstra To: Michal =?iso-8859-1?Q?Koutn=FD?= Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Ingo Molnar , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Frederic Weisbecker Subject: Re: [RFC PATCH 0/9] Add kernel cmdline option for rt_group_sched Message-ID: <20250107194106.GB28303@noisy.programming.kicks-ass.net> References: <20241216201305.19761-1-mkoutny@suse.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20241216201305.19761-1-mkoutny@suse.com> On Mon, Dec 16, 2024 at 09:12:56PM +0100, Michal Koutný wrote: > Despite RT_GROUP_SCHED is only available on cgroup v1, there are still > some users of this feature. General purpose distros (e.g. [1][2][3][4]) > cannot enable CONFIG_RT_GROUP_SCHED easily: We all hate this thing and want it to go away. So not being able to use it is a pro from where I'm at. Sadly the replacement isn't there yet either, which makes it all really difficult.