From: Gregory Price <gourry@gourry.net>
To: "David Hildenbrand (Arm)" <david@kernel.org>
Cc: "Darrick J. Wong" <djwong@kernel.org>,
John Groves <John@groves.net>, Miklos Szeredi <miklos@szeredi.hu>,
Joanne Koong <joannelkoong@gmail.com>,
Bernd Schubert <bernd@bsbernd.com>,
John Groves <john@jagalactic.com>,
Dan Williams <dan.j.williams@intel.com>,
Bernd Schubert <bschubert@ddn.com>,
Alison Schofield <alison.schofield@intel.com>,
John Groves <jgroves@micron.com>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
Vishal Verma <vishal.l.verma@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Matthew Wilcox <willy@infradead.org>, Jan Kara <jack@suse.cz>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>,
Randy Dunlap <rdunlap@infradead.org>,
Jeff Layton <jlayton@kernel.org>,
Amir Goldstein <amir73il@gmail.com>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Stefan Hajnoczi <shajnocz@redhat.com>,
Josef Bacik <josef@toxicpanda.com>,
Bagas Sanjaya <bagasdotme@gmail.com>,
Chen Linxuan <chenlinxuan@uniontech.com>,
James Morse <james.morse@arm.com>, Fuad Tabba <tabba@google.com>,
Sean Christopherson <seanjc@google.com>,
Shivank Garg <shivankg@amd.com>,
Ackerley Tng <ackerleytng@google.com>,
Aravind Ramesh <arramesh@micron.com>,
Ajay Joshi <ajayjoshi@micron.com>,
"venkataravis@micron.com" <venkataravis@micron.com>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"nvdimm@lists.linux.dev" <nvdimm@lists.linux.dev>,
"linux-cxl@vger.kernel.org" <linux-cxl@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
djbw@kernel.org
Subject: Re: [PATCH V10 00/10] famfs: port into fuse
Date: Wed, 15 Apr 2026 09:34:56 -0400 [thread overview]
Message-ID: <ad-UAMcALRubBcHk@gourry-fedora-PF4VCD3F> (raw)
In-Reply-To: <f254f6fc-dc06-4612-82d7-35bb10dbd32e@kernel.org>
On Wed, Apr 15, 2026 at 10:16:38AM +0200, David Hildenbrand (Arm) wrote:
> On 4/15/26 00:20, Gregory Price wrote:
> > On Tue, Apr 14, 2026 at 11:57:40AM -0700, Darrick J. Wong wrote:
> >>>
> >>> I very strongly object to making this a prerequisite to merging. This
> >>> is an untested idea that will certainly delay us by at least a couple
> >>> of merge windows when products are shipping now, and the existing approach
> >>> has been in circulation for a long time. It is TOO LATE!!!!!!
> >>
> > ...
> >>
> >> That said, you're clearly pissed at the goalposts changing yet again,
> >> and that's really not fair that we collectively keep moving them.
> >>
> >
> > This seems a bit more than moving a goalpost.
> >
> > We're now gating working software, for real working hardware, on a novel,
> > unproven BPF ops structure that controls page table mappings on page table
> > faults which would be used by exactly 1 user : FAMFS.
>
> Are MM people on board with even letting BPF do that? Honest question,
> if someone has a pointer to how that should work, that would be appreciated.
>
This was my first reaction when I realized the BPF program would be
controlling iomap return value in the fault path. Big ol' (!) popped
up over my head.
~Gregory
next prev parent reply other threads:[~2026-04-15 13:35 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20260331123702.35052-1-john@jagalactic.com>
2026-03-31 12:37 ` [PATCH V10 00/10] famfs: port into fuse John Groves
2026-03-31 12:38 ` [PATCH V10 01/10] famfs_fuse: Update macro s/FUSE_IS_DAX/FUSE_IS_VIRTIO_DAX/ John Groves
2026-03-31 12:38 ` [PATCH V10 02/10] famfs_fuse: Basic fuse kernel ABI enablement for famfs John Groves
2026-03-31 12:38 ` [PATCH V10 03/10] famfs_fuse: Plumb the GET_FMAP message/response John Groves
2026-03-31 12:38 ` [PATCH V10 04/10] famfs_fuse: Create files with famfs fmaps John Groves
2026-03-31 12:38 ` [PATCH V10 05/10] famfs_fuse: GET_DAXDEV message and daxdev_table John Groves
2026-03-31 12:39 ` [PATCH V10 06/10] famfs_fuse: Plumb dax iomap and fuse read/write/mmap John Groves
2026-03-31 12:39 ` [PATCH V10 07/10] famfs_fuse: Add holder_operations for dax notify_failure() John Groves
2026-03-31 12:39 ` [PATCH V10 08/10] famfs_fuse: Add DAX address_space_operations with noop_dirty_folio John Groves
2026-03-31 12:39 ` [PATCH V10 09/10] famfs_fuse: Add famfs fmap metadata documentation John Groves
2026-03-31 12:39 ` [PATCH V10 10/10] famfs_fuse: Add documentation John Groves
2026-04-01 15:15 ` [PATCH V10 00/10] famfs: port into fuse John Groves
2026-04-06 17:43 ` Joanne Koong
2026-04-10 14:46 ` John Groves
2026-04-10 15:24 ` Bernd Schubert
2026-04-10 18:38 ` John Groves
2026-04-10 19:44 ` Joanne Koong
2026-04-14 13:19 ` Miklos Szeredi
2026-04-14 13:41 ` John Groves
2026-04-14 14:18 ` Miklos Szeredi
2026-04-14 15:23 ` John Groves
2026-04-14 18:57 ` Darrick J. Wong
2026-04-14 22:13 ` Joanne Koong
2026-04-14 23:36 ` Darrick J. Wong
2026-04-15 0:10 ` John Groves
2026-04-14 22:20 ` Gregory Price
2026-04-15 8:16 ` David Hildenbrand (Arm)
2026-04-15 13:34 ` Gregory Price [this message]
2026-04-15 14:04 ` Miklos Szeredi
2026-04-15 15:10 ` Matthew Wilcox
2026-04-15 15:28 ` Darrick J. Wong
2026-04-15 15:32 ` Gregory Price
2026-04-15 17:12 ` Joanne Koong
2026-04-15 19:40 ` Gregory Price
2026-04-14 23:53 ` John Groves
2026-04-15 0:15 ` Darrick J. Wong
2026-04-15 8:57 ` Miklos Szeredi
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