From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 D7ED1370AE3 for ; Wed, 10 Jun 2026 04:31:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781065867; cv=none; b=a6wMbQCkW5iXJEJhULX3Cf0kDj2I9v8I3O6qnD3BkDJPc9FFoJ4frYeCbXqRcY4hRLWIIWI9PqMdrtdOcvtKZyr0MmyTvWTyhGG1wigyvuuexILQI5IKeBQNzkrtg8grXxpLsC1dyVDNr3diFWR5pjOulrez4N+bnAtmGneFHdU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781065867; c=relaxed/simple; bh=0ABNNGM/zxV6N2sDOSOXZDKMF3wzdX/gxcb/XJbb4Yk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=m/GMw0k0DauF7Bt1gKkofESBavbFbwwVodluEfIR68ao684Aysux9kt1DIbyybs0a2bvGbEHYZGYpjd49mldVfTCa+8mvkn8huivrjjmalNFKIa1b9yMBaKHKW8wTQx2sz4eCxX9dph2YgOvHOXl8AJAYMwz9ze5+ar42y7CGg0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=W1LyO1vl; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="W1LyO1vl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3D2901F00893; Wed, 10 Jun 2026 04:31:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781065866; bh=oIPCw4hLIXjJ340uDuLDf5xtmJ5S87ThqtkJVZJ+Qbw=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=W1LyO1vlPon6sWMeINyTKcqxP4B15QNVKY0MxBfWPwl8K/76JANODYyQH/vOVxDiM kQ0F0jZKYFqOJy6co6s6Nrj8iXqtiWzsw2YQTtzHRRWkkcTAUNU2v9+F2uzg7F/jo+ IUu1SpxTCiK/7vDELmZYDb/kaTJ57y+Z5Y1EseRAB7R5+Qi1FIcQiCpnwpUHmXY1aU tZjJnt66fBpq4lv40irh5CYnv2uAFXs5eELVYyux7Xp2yY2csA3KjMAkpPpaf/DyQG 8o/Y9efSib1WpGvojY+vPY3CvFYaH/7Z+2J7RwZapwXrbttPebqcOV2dG6Ta/HuWch lGLoxQHmX8iZQ== Date: Tue, 9 Jun 2026 21:31:04 -0700 From: Drew Fustini To: Reinette Chatre Cc: Ben Horgan , Tony Luck , James Morse , Dave Martin , Babu Moger , Fenghua Yu , Chen Yu , Borislav Petkov , Thomas Gleixner , Dave Hansen , Peter Newman , "x86@kernel.org" , "linux-kernel@vger.kernel.org" Subject: Re: [RFC] mpam,x86,fs/resctrl: Generic schema description Proof of Concept Message-ID: References: <29c95b69-e1a4-46b1-ab8b-45c09308b924@arm.com> <7f2d0cc3-266c-4fa3-a9ba-7352325c76d1@intel.com> <3ef279c9-c4b3-48cb-8235-da8a871b54f9@arm.com> <5cffdb88-924e-43e7-84f2-ea19d82910fb@intel.com> <0c957e0a-0188-40c0-96e6-4e5d787a8ae6@arm.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=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Jun 09, 2026 at 08:28:09AM -0700, Reinette Chatre wrote: > - I see that the default of zero for the MIN control can be appropriate. For the > usage of resctrl_get_default_ctrlval() when creating a new control group this > could be ok as a general setting since the user is expected to, after creating > the resource group, adjust control values as required by the workloads it will > contain. I need to make sure about this from all architectures and if 0 is not > ok then we could use Drew's suggestion of architecture providing a specific reset > value. Unfortunately, 0 will not work for the default value for Reserved bandwidth Blocks (Rbwb) in RISC-V CBQRI as it is required by the spec to be at least 1. Thanks, Drew