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Date: Thu, 4 Nov 2021 10:34:17 -0700 From: "Darrick J. Wong" <djwong@...nel.org> To: Christoph Hellwig <hch@....de> Cc: Eric Sandeen <sandeen@...deen.net>, Dan Williams <dan.j.williams@...el.com>, Mike Snitzer <snitzer@...hat.com>, Ira Weiny <ira.weiny@...el.com>, dm-devel@...hat.com, linux-xfs@...r.kernel.org, nvdimm@...ts.linux.dev, linux-s390@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-erofs@...ts.ozlabs.org, linux-ext4@...r.kernel.org, virtualization@...ts.linux-foundation.org Subject: Re: futher decouple DAX from block devices On Thu, Nov 04, 2021 at 09:17:40AM +0100, Christoph Hellwig wrote: > On Wed, Nov 03, 2021 at 12:59:31PM -0500, Eric Sandeen wrote: > > Christoph, can I ask what the end game looks like, here? If dax is completely > > decoupled from block devices, are there user-visible changes? > > Yes. > > > If I want to > > run fs-dax on a pmem device - what do I point mkfs at, if not a block device? > > The rough plan is to use the device dax character devices. I'll hopefully > have a draft version in the next days. /me wonders, are block devices going away? Will mkfs.xfs have to learn how to talk to certain chardevs? I guess jffs2 and others already do that kind of thing... but I suppose I can wait for the real draft to show up to ramble further. ;) --D
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