From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 9C0A41E9919; Sat, 29 Aug 2026 09:28:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787995687; cv=none; b=SYDqyBhRg2FUNbFjnkhAyNVxO1LUsEgjBW8EZldcbreEy37dqAzHqXrORUjgziQrgw+Kb5h+an/GrM8BxShiQ+ZXJhZatDsJ5vqeaWMPrh3wrvAtDqVVhoaTmDgDOzWURdscXb9nFF5SJuX0Qo0X522sW9bcewwB/HR0SW9GPBg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787995687; c=relaxed/simple; bh=v/8YmhLrFnQRVVkJDwi/gdfTFBqsiyk2BeUZ+ACMX/M=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=oAm7wZ0FOOVhbsWmxPRJFpdpmMSuu5RtPxfU4IWdYIGz6CJh0gqvBe9haoLbH4xQAhYCU/lDy/XGfhhrGRI9msNXTRn2GjhZAnMmomLM6B12p4usRw7nnnfERI43WtllGoObJ6oT0Er2u4RL3H6huwrreEdSku6kcV59mA3t6ho= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=pass smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=MgBO+uT5; arc=none smtp.client-ip=90.155.92.199 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) header.d=infradead.org header.i=@infradead.org header.b="MgBO+uT5" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; 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=gsx9FzCn0fYeIPez1WlJp41xEuPVWj4SvlX0oJHdrIk=; b=MgBO+uT5JRXLPLYJ2slbhZllMv jPZ0jbBQasvPZaSEPTCanzWK68CZziReYsRD7ykhO/Xs8gO+6ZLMxaUJ6sLbeCXgSZhAjDi4OT/72 zypaCnWwMWy3RB+Csm7TtXL9ujEzeFGRydGNksD4W3eppzoxr48IsE9I+dLEqvX3+zCp4raNnzMwz QVVfCV/kq9qWmx3siUGyXd9TLqk4/2hXRjPcUgcR/u/zmA67Ak70R/MDQlban4dCjMKh071wHWb+P FVlrTDubxDdk3960Gk2O3LOke7eHU16j5H8mullUKrsHTXHCkJD+O3idnU7ZKqTfOgRJLJYPnOD3i cwixDHhw==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.99.2 #2 (Red Hat Linux)) id 1x0FLP-00000008mBV-1tk0; Sat, 29 Aug 2026 09:27:23 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 6551A300382; Sat, 29 Aug 2026 11:27:21 +0200 (CEST) Date: Sat, 29 Aug 2026 11:27:21 +0200 From: Peter Zijlstra To: Tim Chen Cc: Ingo Molnar , Vincent Guittot , Qais Yousef , K Prateek Nayak , Juri Lelli , Dietmar Eggemann , Valentin Schneider , Madadi Vineeth Reddy , Shrikanth Hegde , Jianyong Wu , Yangyu Chen , Tingyin Duan , Vern Hao , Vern Hao , Len Brown , Aubrey Li , Zhao Liu , Chen Yu , Chen Yu , Adam Li , Aaron Lu , Tim Chen , Josh Don , Luo Gengkun , Gavin Guo , Yi Lai , Ricardo Neri , linux-kernel@vger.kernel.org, linux-api@vger.kernel.org Subject: Re: [RFC PATCH 0/7] sched/cache: Per-task control of cache aware scheduling via prctl Message-ID: <20260829092721.GB776954@noisy.programming.kicks-ass.net> References: 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=us-ascii Content-Disposition: inline In-Reply-To: On Fri, Aug 28, 2026 at 03:29:07PM -0700, Tim Chen wrote: > Feedbacks very welcome, especially on the interface shape (prctl vs. a QoS > attribute), the kernel-owned-cookie choice, and whether the always/advise/ > never policy composition is the right model. Who would be using this -- what workload prompted you do do this etc.