]
https://lore.kernel.org/all/166630293549.1017198.3833687373550679565.st...@dwillia2-xfh.jf.intel.com/
[4] https://www.computeexpresslink.org/download-the-specification
[5] https://github.com/cxl-micron-reskit/famfs-linux
John Groves (20):
famfs: Documentation
dev_dax_iomap: Add fs_dax_get() func to prepare dax for fs-d
Introduce Documentation/filesystems/famfs.rst into the Documentation
tree
Signed-off-by: John Groves
---
Documentation/filesystems/famfs.rst | 124
1 file changed, 124 insertions(+)
create mode 100644 Documentation/filesystems/famfs.rst
diff --git a/Documentation
This function should be called by fs-dax file systems after opening the
devdax device. This adds holder_operations.
This function serves the same role as fs_dax_get_by_bdev(), which dax
file systems call after opening the pmem block device.
Signed-off-by: John Groves
---
drivers/dax/super.c
bus.c can't call functions in device.c - that creates a circular linkage
dependency.
Signed-off-by: John Groves
---
drivers/dax/bus.c| 24
drivers/dax/device.c | 23 ---
2 files changed, 24 insertions(+), 23 deletions(-)
diff --git a/driver
ses we need to
add the difference to virt_addr in order to have the physaddr's in
dev_dax->ranges match dev_dax->virt_addr.
Dragons...
Signed-off-by: John Groves
---
drivers/dax/dax-private.h | 1 +
drivers/dax/device.c | 15 +++
2 files changed, 16 insertions(+)
ult()), and the kva is used
for read/write (dax_iomap_rw())
* dev_dax_recovery_write() and dev_dax_zero_page_range() have not been
tested yet. I'm looking for suggestions as to how to test those.
Signed-off-by: John Groves
---
drivers/dax/bus.c | 107 +
Add the CONFIG_DEV_DAX_IOMAP kernel config parameter to control building
of the iomap functionality to support fsdax on devdax.
Signed-off-by: John Groves
---
drivers/dax/Kconfig | 6 ++
1 file changed, 6 insertions(+)
diff --git a/drivers/dax/Kconfig b/drivers/dax/Kconfig
index
Add uapi include file for famfs. The famfs user space uses ioctl on
individual files to pass in mapping information and file size. This
would be hard to do via sysfs or other means, since it's
file-specific.
Signed-off-by: John Groves
---
include/uapi/linux/famfs_ioctl.h
Add the famfs_internal.h include file. This contains internal data
structures such as the per-file metadata structure (famfs_file_meta)
and extent formats.
Signed-off-by: John Groves
---
fs/famfs/famfs_internal.h | 53 +++
1 file changed, 53 insertions
Introduce the famfs superblock operations
Signed-off-by: John Groves
---
fs/famfs/famfs_inode.c | 72 ++
1 file changed, 72 insertions(+)
create mode 100644 fs/famfs/famfs_inode.c
diff --git a/fs/famfs/famfs_inode.c b/fs/famfs/famfs_inode.c
new file
.
Signed-off-by: John Groves
---
fs/famfs/famfs_inode.c | 83 ++
1 file changed, 83 insertions(+)
diff --git a/fs/famfs/famfs_inode.c b/fs/famfs/famfs_inode.c
index 3329aff000d1..82c861998093 100644
--- a/fs/famfs/famfs_inode.c
+++ b/fs/famfs/famfs_inode.c
This commit introduces the famfs fs_context_operations and
famfs_get_inode() which is used by the context operations.
Signed-off-by: John Groves
---
fs/famfs/famfs_inode.c | 178 +
1 file changed, 178 insertions(+)
diff --git a/fs/famfs/famfs_inode.c b
This commit introduces the famfs inode_operations. There is nothing really
unique to famfs here in the inode_operations..
This commit also introduces the famfs_file_system_type struct and the
famfs_kill_sb() function.
Signed-off-by: John Groves
---
fs/famfs/famfs_inode.c | 132
e per-file metadata is just an extent list to the
backing dax dev. The order of this resolution is O(N) for N
extents. Note with the current user space, files usually have
only one extent.
Signed-off-by: John Groves
---
fs/famfs/famfs_file.c | 245 ++
1 fi
replaying the log, or by
umount/mount/log replay - all of which are user space operations.
Signed-off-by: John Groves
---
fs/famfs/famfs_file.c | 136 ++
1 file changed, 136 insertions(+)
diff --git a/fs/famfs/famfs_file.c b/fs/famfs/famfs_file.c
index
- Get the header of the metadata for a file
FAMFSIOC_MAP_GETEXT - Get the extents for a file
The latter two, together, are comparable to xfs_bmap. Our user space tools
use them primarly in testing.
Signed-off-by: John Groves
---
fs/famfs/famfs_file.c | 226
enabled and read via /sys/fs/famfs/...
These counters have proved useful in troubleshooting situations where
PTE faults were happening instead of PMD. No performance impact when
disabled.
Signed-off-by: John Groves
---
fs/famfs/famfs_file.c | 97 +++
fs/famfs
This commit introduces the module init and exit machinery for famfs.
Signed-off-by: John Groves
---
fs/famfs/famfs_inode.c | 44 ++
1 file changed, 44 insertions(+)
diff --git a/fs/famfs/famfs_inode.c b/fs/famfs/famfs_inode.c
index ab46ec50b70d
This commit introduces the ability to open a character /dev/dax device
instead of a block /dev/pmem device. This rests on the dev_dax_iomap
patches earlier in this series.
Signed-off-by: John Groves
---
fs/famfs/famfs_inode.c | 97 +-
1 file changed, 87
This patch introduces famfs into the MAINTAINERS file
Signed-off-by: John Groves
---
MAINTAINERS | 11 +++
1 file changed, 11 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 73d898383e51..e4e8bf3602bb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8097,6 +8097,17 @@ F
Add famfs Kconfig and Makefile, and hook into fs/Kconfig and fs/Makefile
Signed-off-by: John Groves
---
fs/Kconfig| 2 ++
fs/Makefile | 1 +
fs/famfs/Kconfig | 10 ++
fs/famfs/Makefile | 5 +
4 files changed, 18 insertions(+)
create mode 100644 fs/famfs/Kconfig
On 24/02/23 10:23AM, Dave Hansen wrote:
> On 2/23/24 09:42, John Groves wrote:
> > One of the key requirements for famfs is that it service vma faults
> > efficiently. Our metadata helps - the search order is n for n extents,
> > and n is usually 1. But we can still observe g
On 24/02/23 12:04PM, Dan Williams wrote:
> John Groves wrote:
> > On 24/02/23 10:23AM, Dave Hansen wrote:
> > > On 2/23/24 09:42, John Groves wrote:
> > > > One of the key requirements for famfs is that it service vma faults
> > > > efficiently. Our me
On 24/02/23 05:39PM, Randy Dunlap wrote:
> Hi--
>
> On 2/23/24 09:41, John Groves wrote:
> > Add uapi include file for famfs. The famfs user space uses ioctl on
> > individual files to pass in mapping information and file size. This
> > would be hard to do via sysfs
On 24/02/23 05:50PM, Randy Dunlap wrote:
> Hi,
>
> On 2/23/24 09:42, John Groves wrote:
> > Add famfs Kconfig and Makefile, and hook into fs/Kconfig and fs/Makefile
> >
> > Signed-off-by: John Groves
> > ---
> > fs/Kconfig| 2 ++
> > f
On 24/02/23 07:27PM, Randy Dunlap wrote:
> Hi John,
>
> On 2/23/24 18:23, John Groves wrote:
> >>> +
> >>> +#define FAMFSIOC_MAGIC 'u'
> >> This 'u' value should be documented in
> >> Documentation/userspace-api/ioctl/ioctl-n
On 24/02/23 04:07PM, Luis Chamberlain wrote:
> On Fri, Feb 23, 2024 at 11:41:44AM -0600, John Groves wrote:
> > This patch set introduces famfs[1] - a special-purpose fs-dax file system
> > for sharable disaggregated or fabric-attached memory (FAM). Famfs is not
> > CXL-s
On 24/02/26 12:05PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:46 -0600
> John Groves wrote:
>
> > This function should be called by fs-dax file systems after opening the
> > devdax device. This adds holder_operations.
> >
> > This function serves th
On 24/02/26 12:10PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:47 -0600
> John Groves wrote:
>
> > bus.c can't call functions in device.c - that creates a circular linkage
> > dependency.
> >
> > Signed-off-by: John Groves
>
> This a
On 24/02/26 12:21PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:48 -0600
> John Groves wrote:
>
> > Save the kva from memremap because we need it for iomap rw support
> >
> > Prior to famfs, there were no iomap users of /dev/dax - so the virtual
> > add
On 24/02/26 12:32PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:49 -0600
> John Groves wrote:
>
> > Notes about this commit:
> >
> > * These methods are based somewhat loosely on pmem_dax_ops from
> > drivers/nvdimm/pmem.c
> >
> > * de
On 24/02/26 12:34PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:50 -0600
> John Groves wrote:
>
> > Add the CONFIG_DEV_DAX_IOMAP kernel config parameter to control building
> > of the iomap functionality to support fsdax on devdax.
>
> I would squash wit
On 24/02/26 12:39PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:51 -0600
> John Groves wrote:
>
> > Add uapi include file for famfs. The famfs user space uses ioctl on
> > individual files to pass in mapping information and file size. This
> > would be ha
On 24/02/26 12:48PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:52 -0600
> John Groves wrote:
>
> > Add the famfs_internal.h include file. This contains internal data
> > structures such as the per-file metadata structure (famfs_file_meta)
> > and extent form
On 24/02/26 04:56PM, Jonathan Cameron wrote:
> On Mon, 26 Feb 2024 10:44:43 -0600
> John Groves wrote:
>
> > On 24/02/26 12:39PM, Jonathan Cameron wrote:
> > > On Fri, 23 Feb 2024 11:41:51 -0600
> > > John Groves wrote:
> > >
> > > > Add
On 24/02/26 07:53AM, Luis Chamberlain wrote:
> On Mon, Feb 26, 2024 at 07:27:18AM -0600, John Groves wrote:
> > Run status group 0 (all jobs):
> > WRITE: bw=29.6GiB/s (31.8GB/s), 29.6GiB/s-29.6GiB/s (31.8GB/s-31.8GB/s),
> > io=44.7GiB (48.0GB), run=1511-1511msec
>
&
On 24/02/26 12:51PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:53 -0600
> John Groves wrote:
>
> > Introduce the famfs superblock operations
> >
> > Signed-off-by: John Groves
> > ---
> > fs/famfs/famfs_inode.c | 72 +++
On 24/02/26 12:56PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:54 -0600
> John Groves wrote:
>
> > Famfs works on both /dev/pmem and /dev/dax devices. This commit introduces
> > the function that opens a block (pmem) device and the struct
> > dax_holder_ope
On 24/02/26 01:20PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:55 -0600
> John Groves wrote:
>
> > This commit introduces the famfs fs_context_operations and
> > famfs_get_inode() which is used by the context operations.
> >
> > Signed-off-by: John
On 24/02/26 01:25PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:56 -0600
> John Groves wrote:
>
> > This commit introduces the famfs inode_operations. There is nothing really
> > unique to famfs here in the inode_operations..
> >
> >
On 24/02/26 01:30PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:57 -0600
> John Groves wrote:
>
> > This commit introduces the famfs iomap_ops. When either
> > dax_iomap_fault() or dax_iomap_rw() is called, we get a callback
> > via our iomap_begin() handler.
On 24/02/26 01:32PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:58 -0600
> John Groves wrote:
>
> > This commit introduces the famfs file_operations. We call
> > thp_get_unmapped_area() to force PMD page alignment. Our read and
> > write handlers
On 24/02/26 04:58PM, Luis Chamberlain wrote:
> On Mon, Feb 26, 2024 at 1:16 PM John Groves wrote:
> >
> > On 24/02/26 07:53AM, Luis Chamberlain wrote:
> > > On Mon, Feb 26, 2024 at 07:27:18AM -0600, John Groves wrote:
> > > > Run status group 0 (all jobs):
>
On 24/02/27 02:38PM, Christian Brauner wrote:
> On Fri, Feb 23, 2024 at 11:41:52AM -0600, John Groves wrote:
> > Add the famfs_internal.h include file. This contains internal data
> > structures such as the per-file metadata structure (famfs_file_meta)
> > and extent formats
On 24/02/26 12:51PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:41:53 -0600
> John Groves wrote:
> > + */
> > +static int famfs_show_options(
> > + struct seq_file *m,
> > + struct dentry *root)
> Not that familiar with fs code, but this unusual kerne
On 24/02/27 02:39PM, Christian Brauner wrote:
> On Fri, Feb 23, 2024 at 11:41:54AM -0600, John Groves wrote:
> > Famfs works on both /dev/pmem and /dev/dax devices. This commit introduces
> > the function that opens a block (pmem) device and the struct
> > dax_holder_operation
On 24/02/26 01:47PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:42:01 -0600
> John Groves wrote:
>
> > This commit introduces the module init and exit machinery for famfs.
> >
> > Signed-off-by: John Groves
> I'd prefer to see this from the start w
On 24/02/26 01:52PM, Jonathan Cameron wrote:
> On Fri, 23 Feb 2024 11:42:02 -0600
> John Groves wrote:
>
> > This commit introduces the ability to open a character /dev/dax device
> > instead of a block /dev/pmem device. This rests on the dev_dax_iomap
> > pat
On 24/02/27 02:41PM, Christian Brauner wrote:
> On Fri, Feb 23, 2024 at 11:41:55AM -0600, John Groves wrote:
> > This commit introduces the famfs fs_context_operations and
> > famfs_get_inode() which is used by the context operations.
> >
> > Signed-off-by: John Gr
On 24/02/27 10:28AM, Jonathan Cameron wrote:
> On Mon, 26 Feb 2024 11:35:17 -0600
> John Groves wrote:
>
> > On 24/02/26 12:48PM, Jonathan Cameron wrote:
> > > On Fri, 23 Feb 2024 11:41:52 -0600
> > > John Groves wrote:
> > >
> > > >
Hi Dave!
On 24/02/29 01:15PM, Dave Chinner wrote:
> On Mon, Feb 26, 2024 at 08:05:58PM -0600, John Groves wrote:
> > On 24/02/26 04:58PM, Luis Chamberlain wrote:
> > > On Mon, Feb 26, 2024 at 1:16 PM John Groves wrote:
> > > >
> > > > On 24/02/26 07:
On 24/02/29 08:52AM, Amir Goldstein wrote:
> On Fri, Feb 23, 2024 at 7:42 PM John Groves wrote:
> >
> > This patch set introduces famfs[1] - a special-purpose fs-dax file system
> > for sharable disaggregated or fabric-attached memory (FAM). Famfs is not
> >
Initial reply to both Amir and Miklos. Sorry for the delay - I took a few
days off after LSFMM and I'm just re-engaging now.
First an observation: these messages are on the famfs v1 patch set thread.
The v2 patch set is at [1]. That is also the default branch now if you clone
the famfs kernel from
On 24/05/22 10:58AM, Miklos Szeredi wrote:
> On Wed, 22 May 2024 at 04:05, John Groves wrote:
> > I'm happy to help with that if you care - ping me if so; getting a VM
> > running
> > in EFI mode is not necessary if you reserve the dax memory via memmap=, or
> >
ing some kernel modules
soon, and would be interested in preemptively avoiding /dev name space
conflicts if possible, but we don't see any need for an invariant
major number. The names we currently use are /dev/mpool[ctl].
Is linux-doc the right list to ask? Any tips appreciated.
John Grov
_phys() since
both bus.c and device.c now call it.
Signed-off-by: John Groves
---
drivers/dax/bus.c| 24
drivers/dax/device.c | 23 ---
2 files changed, 24 insertions(+), 23 deletions(-)
diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index fde29e0
- https://github.com/cxl-micron-reskit/famfs
[3] - https://lore.kernel.org/linux-cxl/cover.1708709155.git.j...@groves.net/
[4] - https://lore.kernel.org/linux-cxl/cover.1714409084.git.j...@groves.net/
[5] - https://lwn.net/Articles/983105/
[6] -
https://lore.kernel.org/linux-cxl/cover
sed
for read/write (dax_iomap_rw())
* dev_dax_recovery_write() and dev_dax_zero_page_range() have not been
tested yet. I'm looking for suggestions as to how to test those.
Signed-off-by: John Groves
---
drivers/dax/bus.c | 120 --
1 file chan
famfs needs access to dev_dax_get()
Signed-off-by: John Groves
---
drivers/dax/super.c | 3 ++-
include/linux/dax.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 48bab9b5f341..033fd841c2bb 100644
--- a/drivers/dax/super.c
device.
This also adds the CONFIG_DEV_DAX_IOMAP Kconfig parameter
Signed-off-by: John Groves
---
drivers/dax/Kconfig | 6 ++
drivers/dax/super.c | 30 ++
include/linux/dax.h | 5 +
3 files changed, 41 insertions(+)
diff --git a/drivers/dax/Kconfig b/drivers/dax
ge tables, but this works in all known cases.
Signed-off-by: John Groves
---
drivers/dax/dax-private.h | 1 +
drivers/dax/device.c | 15 +++
2 files changed, 16 insertions(+)
diff --git a/drivers/dax/dax-private.h b/drivers/dax/dax-private.h
index 0867115aeef2..2a6b07813f9f 10064
Upon completion of a LOOKUP, if we're in famfs-mode we do a GET_FMAP to
retrieve and cache up the file-to-dax map in the kernel. If this
succeeds, read/write/mmap are resolved direct-to-dax with no upcalls.
Signed-off-by: John Groves
---
fs/fuse/dir.c
Add FUSE_FAMFS_DAX config parameter, to control compilation of famfs
within fuse.
Signed-off-by: John Groves
---
fs/fuse/Kconfig | 13 +
1 file changed, 13 insertions(+)
diff --git a/fs/fuse/Kconfig b/fs/fuse/Kconfig
index ca215a3cba3e..e6d554f2a21c 100644
--- a/fs/fuse/Kconfig
Virtio_fs now needs to determine if an inode is DAX && not famfs.
Signed-off-by: John Groves
---
fs/fuse/dir.c| 2 +-
fs/fuse/file.c | 13 -
fs/fuse/fuse_i.h | 6 +-
fs/fuse/inode.c | 2 +-
fs/fuse/iomode.c | 2 +-
5 files changed, 16 insertions(+), 9 d
* -o shadow=
* -o daxdev=
Signed-off-by: John Groves
---
fs/fuse/fuse_i.h | 8 +++-
fs/fuse/inode.c | 25 -
2 files changed, 31 insertions(+), 2 deletions(-)
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index b2c563b1a1c8..931613102d32 100644
--- a/fs/fuse
* FUSE_DAX_FMAP flag in INIT request/reply
* fuse_conn->famfs_iomap (enable famfs-mapped files) to denote a
famfs-enabled connection
Signed-off-by: John Groves
---
fs/fuse/fuse_i.h | 3 +++
fs/fuse/inode.c | 5 +
include/uapi/linux/fuse.h | 2 ++
3 files changed,
Famfs distinguishes between its on-media and in-memory superblocks
Signed-off-by: John Groves
---
include/uapi/linux/magic.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h
index bb575f3ab45e..ee497665d8d7 100644
--- a/include/uapi
This just works around a the "poisoned page" warning that will be
properly fixed in a future version of this patch set. Please ignore
for the moment.
Signed-off-by: John Groves
---
fs/dax.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/fs/dax.c b/fs/dax.c
index 21b47402b3dc..63
* The new GET_DAXDEV message/response is enabled
* The command it triggered by the update_daxdev_table() call, if there
are any daxdevs in the subject fmap that are not represented in the
daxdev_dable yet.
Signed-off-by: John Groves
---
fs/fuse/famfs.c | 281
On completion of GET_FMAP message/response, setup the full famfs
metadata such that it's possible to handle read/write/mmap directly to
dax. Note that the devdax_iomap plumbing is not in yet...
Update MAINTAINERS for the new files.
Signed-off-by: John Groves
---
MAINTAINERS
This commit fills in read/write/mmap handling for famfs files. The
dev_dax_iomap interface is used - just like xfs in fs-dax mode.
Signed-off-by: John Groves
---
fs/fuse/famfs.c | 432
fs/fuse/file.c | 14 ++
2 files changed, 446 insertions
If we get a notify_failure() call on a daxdev, set its error flag and
prevent further access to that device.
Signed-off-by: John Groves
---
fs/fuse/famfs.c | 154 ++-
fs/fuse/file.c | 6 +-
fs/fuse/fuse_i.h | 6 +-
3 files changed, 117
Add Documentation/filesystems/famfs.rst and update MAINTAINERS
Signed-off-by: John Groves
---
Documentation/filesystems/famfs.rst | 142
Documentation/filesystems/index.rst | 1 +
MAINTAINERS | 1 +
3 files changed, 144 insertions
From: John Groves
This describes the fmap metadata - both simple and interleaved
Signed-off-by: John Groves
---
fs/fuse/famfs_kfmap.h | 90 ---
1 file changed, 85 insertions(+), 5 deletions(-)
diff --git a/fs/fuse/famfs_kfmap.h b/fs/fuse/famfs_kfmap.h
This debug cruft will be dropped from the "real" patch set
Signed-off-by: John Groves
---
fs/fuse/Makefile | 2 +-
fs/fuse/dev.c| 61
2 files changed, 62 insertions(+), 1 deletion(-)
diff --git a/fs/fuse/Makefile b/fs/fuse/Make
On 25/04/21 06:25PM, Darrick J. Wong wrote:
> On Mon, Apr 21, 2025 at 05:00:35PM -0500, John Groves wrote:
> > On 25/04/21 11:27AM, Darrick J. Wong wrote:
> > > On Sun, Apr 20, 2025 at 08:33:27PM -0500, John Groves wrote:
> > > > Subject: famfs: port into fuse
> &
On 25/04/24 07:38AM, Darrick J. Wong wrote:
> On Thu, Apr 24, 2025 at 08:43:33AM -0500, John Groves wrote:
> > On 25/04/20 08:33PM, John Groves wrote:
> > > On completion of GET_FMAP message/response, setup the full famfs
> > > metadata such that it's possible to ha
On 25/04/21 07:10PM, Randy Dunlap wrote:
>
>
> On 4/20/25 6:33 PM, John Groves wrote:
> > Add Documentation/filesystems/famfs.rst and update MAINTAINERS
> >
> > Signed-off-by: John Groves
> > ---
> > Documentation/filesystems/famfs.rst | 142
On 25/04/20 08:33PM, John Groves wrote:
> On completion of GET_FMAP message/response, setup the full famfs
> metadata such that it's possible to handle read/write/mmap directly to
> dax. Note that the devdax_iomap plumbing is not in yet...
>
> Update MAINTAINERS for the new fi
On 25/04/30 03:42PM, Alireza Sanaee wrote:
> On Sun, 20 Apr 2025 20:33:27 -0500
> John Groves wrote:
>
>>
>
> Hi John,
>
> Apologies if the question is far off or irrelevant.
>
> I am trying to understand FAMFS, and I am thinking where does FAMFS
> s
On 25/04/22 06:51PM, Joanne Koong wrote:
> On Sun, Apr 20, 2025 at 6:34 PM John Groves wrote:
> >
> > * -o shadow=
> > * -o daxdev=
> >
> > Signed-off-by: John Groves
> > ---
> > fs/fuse/fuse_i.h | 8 +++-
> > fs/fuse/inode.c | 25
On 25/04/22 06:36PM, Joanne Koong wrote:
> On Sun, Apr 20, 2025 at 6:34 PM John Groves wrote:
> >
> > * FUSE_DAX_FMAP flag in INIT request/reply
> >
> > * fuse_conn->famfs_iomap (enable famfs-mapped files) to denote a
> > famfs-enabled connectio
On 25/04/20 08:43PM, Randy Dunlap wrote:
> Hi,
Hi Randy - thanks for the review!
>
> On 4/20/25 6:33 PM, John Groves wrote:
> > * The new GET_DAXDEV message/response is enabled
> > * The command it triggered by the update_daxdev_table() call, if there
> > are any
On 25/04/20 08:51PM, Randy Dunlap wrote:
>
>
good edits...
Caching them into a branch for the next versions
Thank you!
John
On 25/04/21 11:27AM, Darrick J. Wong wrote:
> On Sun, Apr 20, 2025 at 08:33:27PM -0500, John Groves wrote:
> > Subject: famfs: port into fuse
> >
> > This is the initial RFC for the fabric-attached memory file system (famfs)
> > integration into fuse. In order to functi
On 25/04/21 02:57PM, Darrick J. Wong wrote:
> On Sun, Apr 20, 2025 at 08:33:40PM -0500, John Groves wrote:
> > On completion of GET_FMAP message/response, setup the full famfs
> > metadata such that it's possible to handle read/write/mmap directly to
> > dax. Note that th
On 25/05/06 06:56PM, Miklos Szeredi wrote:
> On Mon, 28 Apr 2025 at 21:00, Darrick J. Wong wrote:
>
> > I don't know what Miklos' opinion is about having multiple
> > fusecmds that do similar things -- on the one hand keeping yours and my
> > efforts separate explodes the amount of userspace abi
On 25/05/01 10:48PM, Joanne Koong wrote:
> On Sun, Apr 20, 2025 at 6:34 PM John Groves wrote:
> >
> > Upon completion of a LOOKUP, if we're in famfs-mode we do a GET_FMAP to
> > retrieve and cache up the file-to-dax map in the kernel. If this
> > succeeds, read/w
On 25/04/20 08:33PM, John Groves wrote:
> Subject: famfs: port into fuse
>
>
I'm planning to apply the review comments and send v2 of
this patch series soon - hopefully next week.
I asked a couple of specific questions for Miklos and
Amir at [1] that I hope they will answer in the
On 25/05/22 05:45PM, Amir Goldstein wrote:
> On Mon, May 12, 2025 at 6:28 PM John Groves wrote:
> >
> > On 25/05/01 10:48PM, Joanne Koong wrote:
> > > On Sun, Apr 20, 2025 at 6:34 PM John Groves wrote:
> > > >
> > > > Upon completion of a LO
On 25/07/04 09:54AM, Amir Goldstein wrote:
> On Thu, Jul 3, 2025 at 8:51 PM John Groves wrote:
> >
> > * FUSE_DAX_FMAP flag in INIT request/reply
> >
> > * fuse_conn->famfs_iomap (enable famfs-mapped files) to denote a
> > famfs-enabled connectio
On 25/07/04 11:39AM, Jonathan Cameron wrote:
> On Thu, 3 Jul 2025 13:50:16 -0500
> John Groves wrote:
>
> > This function should be called by fs-dax file systems after opening the
> > devdax device. This adds holder_operations, which effects exclusivity
> > be
On 25/07/07 10:39AM, Darrick J. Wong wrote:
> On Fri, Jul 04, 2025 at 08:39:59AM -0500, John Groves wrote:
> > On 25/07/04 09:54AM, Amir Goldstein wrote:
> > > On Thu, Jul 3, 2025 at 8:51 PM John Groves wrote:
> > > >
> > > > * FUSE_DAX_FMAP flag in INIT
On 25/07/04 03:30PM, John Groves wrote:
> On 25/07/04 10:54AM, Amir Goldstein wrote:
> > On Thu, Jul 3, 2025 at 8:51 PM John Groves wrote:
> > >
> > > Upon completion of an OPEN, if we're in famfs-mode we do a GET_FMAP to
> > > retrieve and cache up t
On 25/07/08 09:27PM, Darrick J. Wong wrote:
> On Thu, Jul 03, 2025 at 01:50:26PM -0500, John Groves wrote:
> > Upon completion of an OPEN, if we're in famfs-mode we do a GET_FMAP to
> > retrieve and cache up the file-to-dax map in the kernel. If this
> > succeeds, re
On 25/07/09 05:26AM, Miklos Szeredi wrote:
> On Thu, 3 Jul 2025 at 20:56, John Groves wrote:
> >
> > DERP: I did it again; Miklos' email is wrong in this series.
>
> linux-fsdevel also lands in my inbox, so I don't even notice.
>
> I won't get to
On 25/07/08 06:53PM, Darrick J. Wong wrote:
> On Tue, Jul 08, 2025 at 07:02:03AM -0500, John Groves wrote:
> > On 25/07/07 10:39AM, Darrick J. Wong wrote:
> > > On Fri, Jul 04, 2025 at 08:39:59AM -0500, John Groves wrote:
> > > > On 25/07/04 09:54AM, Amir Goldstein
On 25/07/08 08:59PM, Darrick J. Wong wrote:
> On Thu, Jul 03, 2025 at 01:50:25PM -0500, John Groves wrote:
> > * -o shadow=
>
> What is a shadow?
>
> > * -o daxdev=
Derp - OK, that's a stale commit message. Here is the one for the -next
version of this patch:
et/Articles/983105/
[6] -
https://lore.kernel.org/linux-cxl/cover.8068ad144a7eea4a813670301f4d2a86a8e68ec4.1740713401.git-series.apop...@nvidia.com/
John Groves (18):
dev_dax_iomap: Move dax_pgoff_to_phys() from device.c to bus.c
dev_dax_iomap: Add fs_dax_get() func to prepare dax for fs-dax usa
_phys() since
both bus.c and device.c now call it.
Signed-off-by: John Groves
---
drivers/dax/bus.c| 24
drivers/dax/device.c | 23 ---
2 files changed, 24 insertions(+), 23 deletions(-)
diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index fde29e0
1 - 100 of 125 matches
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