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 63EE518E778; Mon, 28 Oct 2024 14:49:53 +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=1730126993; cv=none; b=OurQUBaBo/nIJslbl0l81wTpCwJRwFvMj7O7HE3kYCVRo9N4BtXlheyCu2CqN0GmjJK76Z8tDZ3fw1SxzMGlh5i5IMa7nbhusowQyW4ViTLt/dzUCG5jsiMgAZahAUk9zT8H08Rwr8+ZVc/HiPKh/bwj5XDq1b2DDIMnf2/IDTs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730126993; c=relaxed/simple; bh=ul4FrUoyTM3eKMpUlfF3PIljQyXaWGzKT1GGKNK0tak=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=i/2jf2Rxd/p9AI+A9i2wT8uIqa+xlNRzaFCelqPVyl5O5Gg0fB5K+hOQ8nxSX6s0yZwpbmQtdjH4ElGjFinICkCxRt5B6HA2pvdOvgrW4BmZ0uJqTgoc7PaHwCYqUEwC42PGr3QTd0y8L9XMNU+hto3O4s/NLQZnsrG9SZ/gH1I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aKPg/yRG; 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="aKPg/yRG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 68628C4CEC3; Mon, 28 Oct 2024 14:49:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730126992; bh=ul4FrUoyTM3eKMpUlfF3PIljQyXaWGzKT1GGKNK0tak=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=aKPg/yRGtLNyL4aEfn9s0bwut8kYW1Njtk9aiQdYWsGOXQF1xoShKYeG1bzNcaHJD qsix6/5YGv7/9a039tLdMy/YksesxdLpd91QpE6LTiqJagUqEpImTPBdF6onUFXuDO mbkYYlJa7tp9aXZzL/lG8DsNf0aFZmN4fCMiM6pNLHO5+gf4iPmL5c2wRHwANn0aWm hAy6DnWgLB04DyMd/D+NxRLts2h3jjVTJbYUKMEKgcE6nMq+3Tii2u+liHZf9+3scA 5N/KxtluvFUb5fZWEMnsmPEkxx6Np7SM/nzmHZR3oKSYbJnI7vigo1qYOgEX5rRvLJ eu9slgJHd77bg== Date: Mon, 28 Oct 2024 08:49:50 -0600 From: Keith Busch To: Christoph Hellwig Cc: Keith Busch , linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, joshi.k@samsung.com, javier.gonz@samsung.com, bvanassche@acm.org Subject: Re: [PATCHv9 3/7] block: allow ability to limit partition write hints Message-ID: References: <20241025213645.3464331-1-kbusch@meta.com> <20241025213645.3464331-4-kbusch@meta.com> <20241028115805.GD8517@lst.de> Precedence: bulk X-Mailing-List: io-uring@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: <20241028115805.GD8517@lst.de> On Mon, Oct 28, 2024 at 12:58:05PM +0100, Christoph Hellwig wrote: > On Fri, Oct 25, 2024 at 02:36:41PM -0700, Keith Busch wrote: > > From: Keith Busch > > > > When multiple partitions are used, you may want to enforce different > > subsets of the available write hints for each partition. Provide a > > bitmap attribute of the available write hints, and allow an admin to > > write a different mask to set the partition's allowed write hints. > > Trying my best Greg impersonator voice: This needs to be documented > in Documentation/ABI/stable/sysfs-block. > > That would have also helped me understanding it. AFAIK the split here > is an opt-in, which means the use case I explained in the previous > case would still not work out of the box, right? Right.