linux-kernel - Re: [RFC V2 14/18] famfs_fuse: GET_DAXDEV message and daxdev

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Message-ID: <CAJfpeguxZVVddGQsMtM35tVo0dD118hKBf9KJcuhSBznzqUzSg@mail.gmail.com>
Date: Thu, 14 Aug 2025 21:19:15 +0200
From: Miklos Szeredi <miklos@...redi.hu>
To: "Darrick J. Wong" <djwong@...nel.org>
Cc: John Groves <John@...ves.net>, Dan Williams <dan.j.williams@...el.com>, 
	Bernd Schubert <bschubert@....com>, John Groves <jgroves@...ron.com>, Jonathan Corbet <corbet@....net>, 
	Vishal Verma <vishal.l.verma@...el.com>, Dave Jiang <dave.jiang@...el.com>, 
	Matthew Wilcox <willy@...radead.org>, Jan Kara <jack@...e.cz>, 
	Alexander Viro <viro@...iv.linux.org.uk>, Christian Brauner <brauner@...nel.org>, 
	Randy Dunlap <rdunlap@...radead.org>, Jeff Layton <jlayton@...nel.org>, 
	Kent Overstreet <kent.overstreet@...ux.dev>, linux-doc@...r.kernel.org, 
	linux-kernel@...r.kernel.org, nvdimm@...ts.linux.dev, 
	linux-cxl@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
	Amir Goldstein <amir73il@...il.com>, Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
	Stefan Hajnoczi <shajnocz@...hat.com>, Joanne Koong <joannelkoong@...il.com>, 
	Josef Bacik <josef@...icpanda.com>, Aravind Ramesh <arramesh@...ron.com>, 
	Ajay Joshi <ajayjoshi@...ron.com>
Subject: Re: [RFC V2 14/18] famfs_fuse: GET_DAXDEV message and daxdev_table

On Thu, 14 Aug 2025 at 20:55, Darrick J. Wong <djwong@...nel.org> wrote:

> Or do we move the backing_files_map out of CONFIG_FUSE_PASSTHROUGH and
> then let fuse-iomap/famfs extract the block/dax device from that?
> Then the backing_id/device cookie would be the same across a fuse mount.

Yes.

Thanks,
Miklos