From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 27AC419E7F9; Mon, 23 Jun 2025 22:15:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750716918; cv=none; b=WfU47+Haemybqp7nlyP29Op24tK85L2s27TyRBWIgt/RD9P5lOHjuCHCTTtH1v1KYUp+RTBHotId+C5nBTCiuzaXJiU2dowSCRd3X0MPaE2PKAY2T2UXt1dihWM0TRUHGXNoLwzn5NT+5JezPaAuZ+ZbovgptgyN2a4oAvkOzs8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750716918; c=relaxed/simple; bh=NQnwdVGF9YDZMibpTyHJ/2X8jH/VklWZLlzwFJitvA0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=daXaT38kCWNq2kweQ+oz43RElogN46RM8oUZELntNXmAPu7m34PIFZsd9BW9z+cg/iW8z7rg52kCpqhwL4Zmzj7GaRdVSul37aJXuYa1wzNExrZ4lz+av3Z1yuCFvlnhynZ/VWp1EqkIZc2dFHSs+K5dtt8HG34f4pq1O9v385A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JQ86Q7Vp; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JQ86Q7Vp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CB573C4CEEA; Mon, 23 Jun 2025 22:15:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750716917; bh=NQnwdVGF9YDZMibpTyHJ/2X8jH/VklWZLlzwFJitvA0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=JQ86Q7VpVqOCQrfi/hwLrTLo/Hyw1ZWw6cMaCiM0u8DdYBadWjSF76oxKNpSoSEiW X+Rp4n2Buz5XOGDWN2li65qIkcPsYxo1xs2ucCwP3Yefk/DuVN4ItOIkewuaVa37Tu epjnwtu7LLMpczPgMg9M9N+j4oXKT5SO/EfwXDRwg+xCbDyKuYjVoU7xD7+wBQCbGS Tuwt8KKPfXZdOC49WT+xLK9/OWY+NfqpP8brfPRBAEz7SHCQ8xV4zUWIE4ez4abTLD hm6W7nQMPZEe0U3ZCFugSG3m1kUrefBIEkuvbnZny5rV9X7TWglJB29Gbfp3V8efcs gvWpHBdzQ9sjg== Date: Mon, 23 Jun 2025 12:15:17 -1000 From: Tejun Heo To: Joel Fernandes Cc: linux-kernel@vger.kernel.org, Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , David Vernet , Andrea Righi , Changwoo Min , bpf@vger.kernel.org Subject: Re: [PATCH v5 00/14] Add a deadline server for sched_ext tasks Message-ID: References: <20250620203234.3349930-1-joelagnelf@nvidia.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250620203234.3349930-1-joelagnelf@nvidia.com> On Fri, Jun 20, 2025 at 04:32:15PM -0400, Joel Fernandes wrote: > sched_ext tasks currently are starved by RT hoggers especially since RT > throttling was replaced by deadline servers to boost only CFS tasks. Several > users in the community have reported issues with RT stalling sched_ext tasks. > Add a sched_ext deadline server as well so that sched_ext tasks are also > boosted and do not suffer starvation. I left some minor comments and had a question about adding @rf to ->pick_task() but the patchset generally looks great to me otherwise. Thanks. -- tejun