From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sandeen.net (sandeen.net [63.231.237.45]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 47AAC2C98 for ; Wed, 3 Nov 2021 18:07:54 +0000 (UTC) Received: from [10.0.0.146] (liberator.sandeen.net [10.0.0.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by sandeen.net (Postfix) with ESMTPSA id 2B0BF14627D; Wed, 3 Nov 2021 12:57:54 -0500 (CDT) Message-ID: <21ff4333-e567-2819-3ae0-6a2e83ec7ce6@sandeen.net> Date: Wed, 3 Nov 2021 12:59:31 -0500 Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.2.1 Content-Language: en-US To: Christoph Hellwig Cc: Dan Williams , Mike Snitzer , Ira Weiny , dm-devel@redhat.com, linux-xfs@vger.kernel.org, nvdimm@lists.linux.dev, linux-s390@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, virtualization@lists.linux-foundation.org References: <20211018044054.1779424-1-hch@lst.de> From: Eric Sandeen Subject: Re: futher decouple DAX from block devices In-Reply-To: <20211018044054.1779424-1-hch@lst.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/17/21 11:40 PM, Christoph Hellwig wrote: > Hi Dan, > > this series cleans up and simplifies the association between DAX and block > devices in preparation of allowing to mount file systems directly on DAX > devices without a detour through block devices. Christoph, can I ask what the end game looks like, here? If dax is completely decoupled from block devices, are there user-visible changes? If I want to run fs-dax on a pmem device - what do I point mkfs at, if not a block device? Thanks, -Eric