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:
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 25/07/08 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 25/07/09 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 25/07/07 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 02:20PM, Jonathan Cameron wrote:
> On Thu, 3 Jul 2025 13:50:28 -0500
> 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 daxdevs in th
On 25/07/04 01:47PM, Jonathan Cameron wrote:
> On Thu, 3 Jul 2025 13:50:18 -0500
> John Groves wrote:
>
> > Notes about this commit:
> >
> > * These methods are based on pmem_dax_ops from drivers/nvdimm/pmem.c
> >
> > * dev_dax_direct_access() is re
On 25/07/04 11:13AM, Amir Goldstein wrote:
> On Thu, Jul 3, 2025 at 8:51 PM John Groves wrote:
> >
> > 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:
On 25/07/04 11:01AM, Amir Goldstein wrote:
> On Thu, Jul 3, 2025 at 8:51 PM 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
On 25/07/05 09:58AM, Amir Goldstein wrote:
> On Sat, Jul 5, 2025 at 2:06 AM John Groves wrote:
> >
> > 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:
> >
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 25/07/04 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 the file-to-dax map in the kernel. If this
> > succeeds, read/w
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 25/07/03 01:50PM, John Groves wrote:
> * 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 +++
>
DERP: I did it again; Miklos' email is wrong in this series.
Forwarding to him...
John
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 | 87 ---
1 file changed, 82 insertions(+), 5 deletions(-)
diff --git a/fs/fuse/famfs_kfmap.h b/fs/fuse/famfs_kfmap.h
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 | 70 ++---
1 file changed, 67 insertions(+), 3 deletions(-)
diff --git a/fs/fuse/famfs.c b/fs
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 | 436 +++
fs/fuse/file.c | 14 ++
fs/fuse/fuse_i.h | 3 +
3 files
* 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 | 227
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
n the in_args[0].size field. If the fmap would overflow the
message, the fuse server sends a reply of size 'sizeof(uint32_t)' which
specifies the size of the fmap message. Then the kernel can realloc a
large enough buffer and try again.
Signed-off-by: John Groves
---
fs/fuse/file.c
* -o shadow=
* -o daxdev=
Signed-off-by: John Groves
---
fs/fuse/fuse_i.h | 8 +++-
fs/fuse/inode.c | 28 +++-
2 files changed, 34 insertions(+), 2 deletions(-)
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index a592c1002861..f4ee61046578 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 | 14 ++
include/uapi/linux/fuse.h | 4
3 fi
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
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
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
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
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
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
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
_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
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
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 25/04/20 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 25/05/06 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 25/04/30 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 25/04/21 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 25/04/24 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 25/04/20 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 25/04/22 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 25/04/22 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 25/04/21 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 25/04/21 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 25/04/21 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 25/04/20 08:51PM, Randy Dunlap wrote:
>
>
good edits...
Caching them into a branch for the next versions
Thank you!
John
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
_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
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
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
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
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 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
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
* 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
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
* -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,
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
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
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
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
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
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
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
- 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
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
> >
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 24/02/29 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
> >
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 24/02/27 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:
> > >
> > > >
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 24/02/26 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 24/02/26 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 24/02/27 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 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 02:38PM, 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 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 24/02/26 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 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 01:25PM, 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 01:20PM, 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 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 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 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 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 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 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 12:34PM, 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 12:32PM, 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 12:21PM, 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 12:10PM, 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 12:05PM, 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 24/02/23 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 24/02/23 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 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
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