ice-DAX
> sub-systems.
>
> The linux-nvdimm mailing hosts a patchwork instance for both DAX and
> NVDIMM patches.
>
> Cc: Jan Kara
> Cc: Ira Weiny
> Cc: Ross Zwisler
> Cc: Keith Busch
> Cc: Matthew Wilcox
> Signed-off-by: Dan Williams
Acked-by: Ira Weiny
> ---
devm_memremap_pages() users: pmem, devdax, hmm, and p2pdma.
>
> Reported-by: Logan Gunthorpe
> Fixes: 41e94a851304 ("add devm_memremap_pages")
> Cc: Ira Weiny
> Cc: Bjorn Helgaas
> Cc: "Jérôme Glisse"
> Cc: Christoph Hellwig
> Signed-off-by: Dan
THP)"
> Co-developed-by: Liang ZhiCheng
> Signed-off-by: Liang ZhiCheng
> Signed-off-by: Li RongQing
Reviewed-by: Ira Weiny
> ---
> drivers/nvdimm/pmem.c | 8
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/nvdimm/pmem.c b/drivers
From: Ira Weiny
make-git-snapshot.sh made an assumption of the git tree location.
Furthermore, it assumed the user has an rpmbuild environment directory
structure set up.
Enhance the script to figure out where in what location it has been
cloned and create the rpmbuild directory if the user
78b44275 ("ndctl: add passphrase management commands")
> Reviewed-by: Dan Williams
> Signed-off-by: Robert Elliott
V2
Reviewed-by: Ira Weiny
> ---
> configure.ac | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/configure.ac b/configure.ac
On Fri, Feb 15, 2019 at 11:31:46AM -0800, Dan Williams wrote:
> On Fri, Feb 15, 2019 at 11:21 AM wrote:
> >
> > From: Ira Weiny
> >
> > make-git-snapshot.sh made an assumption of the git tree location.
> >
> > Furthermore, it assumed the user has an rpmbu
From: Ira Weiny
make-git-snapshot.sh made an assumption of the git tree location.
Furthermore, it assumed the user has an rpmbuild environment directory
structure set up.
Enhance the script to figure out where in what location it has been
cloned and setup the rpmbuild tree if the user does
From: Ira Weiny
make-git-snapshot.sh made an assumption of the git tree location.
Furthermore, it assumed the user has an rpmbuild environment directory
structure set up.
Enhance the script to error out if not run in the root of the git tree
and create the output directory if the user does
On Fri, Feb 15, 2019 at 01:01:27PM -0800, 'Vishal Verma' wrote:
>
> On Fri, 2019-02-15 at 12:06 -0800, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > make-git-snapshot.sh made an assumption of the git tree location.
> >
> > Furthermore, it assumed
On Fri, Jun 07, 2019 at 09:17:29AM -0300, Jason Gunthorpe wrote:
> On Fri, Jun 07, 2019 at 12:36:36PM +0200, Jan Kara wrote:
>
> > Because the pins would be invisible to sysadmin from that point on.
>
> It is not invisible, it just shows up in a rdma specific kernel
> interface. You have to use
On Fri, Jun 07, 2019 at 01:04:26PM +0200, Jan Kara wrote:
> On Thu 06-06-19 15:03:30, Ira Weiny wrote:
> > On Thu, Jun 06, 2019 at 12:42:03PM +0200, Jan Kara wrote:
> > > On Wed 05-06-19 18:45:33, ira.we...@intel.com wrote:
> > > > From: Ira Weiny
> > >
On Thu, Jun 06, 2019 at 04:51:15PM -0300, Jason Gunthorpe wrote:
> On Thu, Jun 06, 2019 at 12:42:03PM +0200, Jan Kara wrote:
>
> > So I'd like to actually mandate that you *must* hold the file lease until
> > you unpin all pages in the given range (not just that you have an option to
> > hold a
On Thu, Jun 06, 2019 at 03:03:30PM -0700, 'Ira Weiny' wrote:
> On Thu, Jun 06, 2019 at 12:42:03PM +0200, Jan Kara wrote:
> > On Wed 05-06-19 18:45:33, ira.we...@intel.com wrote:
> > > From: Ira Weiny
> > >
> > > ... V1,000,000 ;-)
> > >
From: Ira Weiny
If pages are actively gup pinned fail the truncate operation. To
support an application who wishes to removing a pin upon SIGIO reception
we must change the order of breaking layout leases with respect to DAX
layout leases.
Check for a GUP pin on the page being truncated
From: Ira Weiny
GUP longterm pins of non-pagecache file system pages (eg FS DAX) are
currently disallowed because they are unsafe.
The danger for pinning these pages comes from the fact that hole punch
and/or truncate of those files results in the pages being mapped and
pinned by a user space
From: Ira Weiny
Signed-off-by: Ira Weiny
---
fs/locks.c | 20 ++-
include/trace/events/filelock.h | 35 +
2 files changed, 50 insertions(+), 5 deletions(-)
diff --git a/fs/locks.c b/fs/locks.c
index ec1e4a5df629
From: Ira Weiny
Now that there is a mechanism for users to safely take LONGTERM pins on
FS DAX pages, remove the FS DAX exclusion from GUP with FOLL_LONGTERM.
Special processing remains in effect for CONFIG_CMA
Signed-off-by: Ira Weiny
---
mm/gup.c | 78
From: Ira Weiny
In order to support checking for a layout lease on a FS DAX inode these
calls need to know if FOLL_LONGTERM was specified.
Prepare for this with this patch.
Signed-off-by: Ira Weiny
---
mm/gup.c | 26 +-
1 file changed, 17 insertions(+), 9 deletions
From: Ira Weiny
... V1,000,000 ;-)
Pre-requisites:
John Hubbard's put_user_pages() patch series.[1]
Jan Kara's ext4_break_layouts() fixes[2]
Based on the feedback from LSFmm and the LWN article which resulted. I've
decided to take a slightly different tack on this problem
From: Ira Weiny
On FS DAX files users must inform the file system they intend to take
long term GUP pins on the file pages. Failure to do so should result in
an error.
Ensure that a F_LAYOUT lease exists at the time the GUP call is made.
If not return EPERM.
Signed-off-by: Ira Weiny
---
fs
From: Ira Weiny
Callers of dax_layout_busy_page() are only rarely operating on the
entire file of concern.
Teach dax_layout_busy_page() to operate on a sub-range of the
address_space provided. Specifying 0 - ULONG_MAX however, will continue
to operate on the "entire file" and XFS is
From: Ira Weiny
ext4 needs to break a layout lease if it is held to inform a user
holding a layout lease that a truncate is about to happen. This allows
the user knowledge of, and choice in how to handle, some other thread
attempting to modify a file they are actively using.
Split out
From: Ira Weiny
If pages are actively gup pinned fail the truncate operation.
Signed-off-by: Ira Weiny
---
fs/ext4/inode.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 75f543f384e4..1ded83ec08c0 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4
From: Ira Weiny
dax_layout_busy_page() can now operate on a sub-range of the
address_space provided.
Have xfs specify the sub range to dax_layout_busy_page()
Signed-off-by: Ira Weiny
---
fs/xfs/xfs_file.c | 19 +--
fs/xfs/xfs_inode.h | 5 +++--
fs/xfs/xfs_ioctl.c | 15
On Thu, Jun 06, 2019 at 12:58:55PM +0200, Jan Kara wrote:
> On Wed 05-06-19 18:45:40, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > If pages are actively gup pinned fail the truncate operation.
> >
> > Signed-off-by: Ira Weiny
> > ---
> >
On Wed, Jun 05, 2019 at 11:18:19PM -0700, Christoph Hellwig wrote:
> On Wed, Jun 05, 2019 at 06:45:36PM -0700, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > In order to support checking for a layout lease on a FS DAX inode these
> > calls need to know if
On Wed, Jun 05, 2019 at 10:52:12PM -0700, John Hubbard wrote:
> On 6/5/19 6:45 PM, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > ... V1,000,000 ;-)
> >
> > Pre-requisites:
> > John Hubbard's put_user_pages() patch series.[1]
> >
On Thu, Jun 06, 2019 at 12:42:03PM +0200, Jan Kara wrote:
> On Wed 05-06-19 18:45:33, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > ... V1,000,000 ;-)
> >
> > Pre-requisites:
> > John Hubbard's put_user_pages() patch series.[1]
> >
On Thu, Jun 13, 2019 at 10:25:55AM +1000, Dave Chinner wrote:
> On Wed, Jun 12, 2019 at 05:37:53AM -0700, Matthew Wilcox wrote:
> > On Sat, Jun 08, 2019 at 10:10:36AM +1000, Dave Chinner wrote:
> > > On Fri, Jun 07, 2019 at 11:25:35AM -0700, Ira Weiny wrote:
> > > > A
On Thu, Jun 13, 2019 at 10:55:52AM +1000, Dave Chinner wrote:
> On Wed, Jun 12, 2019 at 04:30:24PM -0700, Ira Weiny wrote:
> > On Wed, Jun 12, 2019 at 05:37:53AM -0700, Matthew Wilcox wrote:
> > > On Sat, Jun 08, 2019 at 10:10:36AM +1000, Dave Chinner wrote:
> > > >
On Thu, Jun 13, 2019 at 08:27:55AM -0700, Matthew Wilcox wrote:
> On Thu, Jun 13, 2019 at 10:25:55AM +1000, Dave Chinner wrote:
> > e.g. Process A has an exclusive layout lease on file F. It does an
> > IO to file F. The filesystem IO path checks that Process A owns the
> > lease on the file and
On Wed, Jun 12, 2019 at 05:37:53AM -0700, Matthew Wilcox wrote:
> On Sat, Jun 08, 2019 at 10:10:36AM +1000, Dave Chinner wrote:
> > On Fri, Jun 07, 2019 at 11:25:35AM -0700, Ira Weiny wrote:
> > > Are you suggesting that we have something like this from user space?
>
On Wed, Jun 12, 2019 at 03:54:19PM -0700, Dan Williams wrote:
> On Wed, Jun 12, 2019 at 3:12 PM Ira Weiny wrote:
> >
> > On Wed, Jun 12, 2019 at 04:14:21PM -0300, Jason Gunthorpe wrote:
> > > On Wed, Jun 12, 2019 at 02:09:07PM +0200, Jan Kara wrote:
> > >
On Wed, Jun 12, 2019 at 04:14:21PM -0300, Jason Gunthorpe wrote:
> On Wed, Jun 12, 2019 at 02:09:07PM +0200, Jan Kara wrote:
> > On Wed 12-06-19 08:47:21, Jason Gunthorpe wrote:
> > > On Wed, Jun 12, 2019 at 12:29:17PM +0200, Jan Kara wrote:
> > >
> > > > > > The main objection to the current ODP
On Thu, Jun 13, 2019 at 08:40:46PM +, Jason Gunthorpe wrote:
> On Thu, Jun 13, 2019 at 11:27:39AM -0700, Dan Williams wrote:
> > On Thu, Jun 13, 2019 at 2:43 AM Christoph Hellwig wrote:
> > >
> > > Hi Dan, Jérôme and Jason,
> > >
> > > below is a series that cleans up the dev_pagemap
On Sat, Jun 08, 2019 at 10:10:36AM +1000, Dave Chinner wrote:
> On Fri, Jun 07, 2019 at 11:25:35AM -0700, Ira Weiny wrote:
> > On Fri, Jun 07, 2019 at 01:04:26PM +0200, Jan Kara wrote:
> > > On Thu 06-06-19 15:03:30, Ira Weiny wrote:
> > > > On Thu, Jun 06, 2019 at 12
On Sun, Jun 09, 2019 at 09:00:24AM -0400, Jeff Layton wrote:
> On Wed, 2019-06-05 at 18:45 -0700, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > GUP longterm pins of non-pagecache file system pages (eg FS DAX) are
> > currently disallowed because they are
;
> +static atomic_t devmap_managed_enable;
> +
> +static void devmap_managed_enable_put(void *data)
> +{
> + if (atomic_dec_and_test(_managed_enable))
> + static_branch_disable(_managed_key);
> +}
> +
> +static int devmap_managed_enable_get(struct device *
ny setups,
> and depend on it instead.
>
> Signed-off-by: Christoph Hellwig
Reviewed-by: Ira Weiny
> ---
> drivers/gpu/drm/nouveau/Kconfig | 2 +-
> mm/Kconfig | 5 ++---
> 2 files changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/d
TR(-EINVAL);
> + if (!pgmap->ref) {
> + if (pgmap->ops && (pgmap->ops->kill || pgmap->ops->cleanup))
> + return ERR_PTR(-EINVAL);
> +
> + init_completion(>done);
> + error = percpu_ref_init(>int
On Wed, Jun 26, 2019 at 02:27:15PM +0200, Christoph Hellwig wrote:
> The functionality is identical to the one currently open coded in
> device-dax.
>
> Signed-off-by: Christoph Hellwig
Reviewed-by: Ira Weiny
> ---
> drivers/dax/dax-private.h | 4
> drivers/d
On Wed, Jun 26, 2019 at 10:14:45AM -0700, 'Ira Weiny' wrote:
> On Wed, Jun 26, 2019 at 09:00:47AM -0700, Dan Williams wrote:
> > [ add Ira ]
> >
> > On Wed, Jun 26, 2019 at 5:27 AM Christoph Hellwig wrote:
> > >
> > > The code hasn't been used sinc
map using
> it.
>
> Signed-off-by: Christoph Hellwig
Reviewed-by: Ira Weiny
> ---
> arch/powerpc/mm/mem.c | 10 +-
> arch/x86/mm/init_64.c | 8 ++--
> drivers/nvdimm/pfn_devs.c | 3 +--
> drivers/nvdimm/pmem.c | 1 -
> include/linux/memremap.h |
> pretty portable.
>
> Signed-off-by: Christoph Hellwig
Seems reasonable to me.
Reviewed-by: Ira Weiny
> ---
> drivers/gpu/drm/nouveau/Kconfig | 3 +--
> include/linux/hmm.h | 5 +
> include/linux/mm_types.h| 2 +-
> mm/
On Wed, Jun 26, 2019 at 02:27:16PM +0200, Christoph Hellwig wrote:
> The functionality is identical to the one currently open coded in
> p2pdma.c.
>
> Signed-off-by: Christoph Hellwig
Reviewed-by: Ira Weiny
> ---
> drivers/pci/p2pdma.c | 57 ---
ice dax gets replaced with an explicit MEMORY_DEVICE_DEVDAX type.
>
> Signed-off-by: Christoph Hellwig
Reviewed-by: Ira Weiny
> ---
> drivers/dax/device.c | 1 +
> include/linux/memremap.h | 8
> kernel/memremap.c| 22 ++
>
On Wed, Jun 26, 2019 at 09:00:47AM -0700, Dan Williams wrote:
> [ add Ira ]
>
> On Wed, Jun 26, 2019 at 5:27 AM Christoph Hellwig wrote:
> >
> > The code hasn't been used since it was added to the tree, and doesn't
> > appear to actually be usable.
> >
> > Signed-off-by: Christoph Hellwig
> >
On Tue, Aug 13, 2019 at 08:48:42AM -0300, Jason Gunthorpe wrote:
> On Mon, Aug 12, 2019 at 02:15:37PM -0700, Ira Weiny wrote:
> > On Mon, Aug 12, 2019 at 02:56:15PM -0300, Jason Gunthorpe wrote:
> > > On Mon, Aug 12, 2019 at 10:28:27AM -0700, Ira Weiny wrote:
> > > >
On Tue, Aug 13, 2019 at 08:47:06AM -0300, Jason Gunthorpe wrote:
> On Mon, Aug 12, 2019 at 02:48:55PM -0700, Ira Weiny wrote:
> > On Mon, Aug 12, 2019 at 09:28:14AM -0300, Jason Gunthorpe wrote:
> > > On Fri, Aug 09, 2019 at 03:58:29PM -0700, ira.we...@intel.com wrote:
>
On Mon, Aug 12, 2019 at 10:00:40AM -0300, Jason Gunthorpe wrote:
> On Fri, Aug 09, 2019 at 03:58:30PM -0700, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > In order for MRs to be tracked against the open verbs context the ufile
> > needs to have a poin
On Sat, Aug 10, 2019 at 09:30:37AM +1000, Dave Chinner wrote:
> On Fri, Aug 09, 2019 at 03:58:21PM -0700, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > dax_layout_busy_page() can now operate on a sub-range of the
> > address_space provided.
> >
&
On Sat, Aug 10, 2019 at 09:52:31AM +1000, Dave Chinner wrote:
> On Fri, Aug 09, 2019 at 03:58:15PM -0700, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > In order to support an opt-in policy for users to allow long term pins
> > of FS DAX pages we need to expo
On Fri, Aug 09, 2019 at 05:18:31PM -0700, John Hubbard wrote:
> On 8/9/19 3:58 PM, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > In preparation for passing more information (vaddr_pin) into
> > follow_page_pte(), follow_devmap_pud(), and follow_devmap_pmd().
On Sat, Aug 10, 2019 at 09:22:09AM +1000, Dave Chinner wrote:
> On Fri, Aug 09, 2019 at 03:58:22PM -0700, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > If pages are under a lease fail the truncate operation. We change the
> > order of
> > lease brea
On Tue, Aug 13, 2019 at 03:00:22PM -0300, Jason Gunthorpe wrote:
> On Tue, Aug 13, 2019 at 10:41:42AM -0700, Ira Weiny wrote:
>
> > And I was pretty sure uverbs_destroy_ufile_hw() would take care of (or
> > ensure
> > that some other thread is) destroying all the
On Thu, Aug 15, 2019 at 03:05:58PM +0200, Jan Kara wrote:
> On Wed 14-08-19 11:08:49, Ira Weiny wrote:
> > On Wed, Aug 14, 2019 at 12:17:14PM +0200, Jan Kara wrote:
> > > Hello!
> > >
> > > On Fri 09-08-19 15:58:14, ira.we...@int
m_region
> - export the memremap_pages and munmap_pages as kvmppc can be a module
Except for the questions from Andrew this does not look to change anything so:
Reviewed-by: Ira Weiny
> ___
> Linux-nvdimm mailing list
> Linux-nvdimm@lists.01.org
&
On Mon, Aug 12, 2019 at 09:28:14AM -0300, Jason Gunthorpe wrote:
> On Fri, Aug 09, 2019 at 03:58:29PM -0700, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > The addition of FOLL_LONGTERM has taken on additional meaning for CMA
> > pages.
> >
> &
On Fri, Aug 09, 2019 at 05:09:54PM -0700, John Hubbard wrote:
> On 8/9/19 3:58 PM, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > The addition of FOLL_LONGTERM has taken on additional meaning for CMA
> > pages.
> >
> > In addition subsyste
On Sun, Aug 11, 2019 at 04:07:23PM -0700, John Hubbard wrote:
> On 8/9/19 3:58 PM, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > The addition of FOLL_LONGTERM has taken on additional meaning for CMA
> > pages.
> >
> > In addition subsyste
On Fri, Aug 09, 2019 at 05:30:00PM -0700, John Hubbard wrote:
> On 8/9/19 3:58 PM, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > Once callers start to use vaddr_pin the put_user_pages calls will need
> > to have access to this data coming in. Prep put_use
On Mon, Aug 19, 2019 at 09:38:41AM -0300, Jason Gunthorpe wrote:
> On Mon, Aug 19, 2019 at 07:24:09PM +1000, Dave Chinner wrote:
>
> > So that leaves just the normal close() syscall exit case, where the
> > application has full control of the order in which resources are
> > released. We've
On Wed, Aug 14, 2019 at 09:23:08AM -0300, Jason Gunthorpe wrote:
> On Tue, Aug 13, 2019 at 01:38:59PM -0700, Ira Weiny wrote:
> > On Tue, Aug 13, 2019 at 03:00:22PM -0300, Jason Gunthorpe wrote:
> > > On Tue, Aug 13, 2019 at 10:41:42AM -0700, Ira Weiny wrote:
> > >
&g
On Wed, Aug 14, 2019 at 12:17:14PM +0200, Jan Kara wrote:
> Hello!
>
> On Fri 09-08-19 15:58:14, ira.we...@intel.com wrote:
> > Pre-requisites
> > ==
> > Based on mmotm tree.
> >
> > Based on the feedback from LSFmm, the LWN article, the RFC series since
> > then, and a ton of
On Fri, Aug 16, 2019 at 12:05:28PM -0700, 'Ira Weiny' wrote:
> On Thu, Aug 15, 2019 at 03:05:58PM +0200, Jan Kara wrote:
> > On Wed 14-08-19 11:08:49, Ira Weiny wrote:
> > > On Wed, Aug 14, 2019 at 12:17:14PM +0200, Jan Kara wrote:
> > > > Hello!
> > > >
53PM -0700, John Hubbard wrote:
> > > > > On 8/19/19 2:24 AM, Dave Chinner wrote:
> > > > > > On Mon, Aug 19, 2019 at 08:34:12AM +0200, Jan Kara wrote:
> > > > > > > On Sat 17-08-19 12:26:03, Dave Chinner wrote:
> > > > > > > > On
On Tue, Aug 20, 2019 at 08:55:15AM -0300, Jason Gunthorpe wrote:
> On Tue, Aug 20, 2019 at 11:12:10AM +1000, Dave Chinner wrote:
> > On Mon, Aug 19, 2019 at 09:38:41AM -0300, Jason Gunthorpe wrote:
> > > On Mon, Aug 19, 2019 at 07:24:09PM +1000, Dave Chinner wrote:
> > >
> > > > So that leaves
On Wed, Aug 21, 2019 at 03:13:43PM -0300, Jason Gunthorpe wrote:
> On Wed, Aug 21, 2019 at 11:02:00AM -0700, Ira Weiny wrote:
> > On Tue, Aug 20, 2019 at 08:55:15AM -0300, Jason Gunthorpe wrote:
> > > On Tue, Aug 20, 2019 at 11:12:10AM +1000, Dave Chinner wrote:
> > > &
On Wed, Aug 21, 2019 at 11:57:03AM -0700, 'Ira Weiny' wrote:
> On Wed, Aug 21, 2019 at 03:13:43PM -0300, Jason Gunthorpe wrote:
> > On Wed, Aug 21, 2019 at 11:02:00AM -0700, Ira Weiny wrote:
> > > On Tue, Aug 20, 2019 at 08:55:15AM -0300, Jason Gunthorpe wrote:
> > > &
On Wed, Aug 21, 2019 at 04:48:10PM -0300, Jason Gunthorpe wrote:
> On Wed, Aug 21, 2019 at 11:57:03AM -0700, Ira Weiny wrote:
>
> > > Oh, I didn't think we were talking about that. Hanging the close of
> > > the datafile fd contingent on some other FD's closure is a r
On Wed, Aug 28, 2019 at 08:27:23PM -0700, John Hubbard wrote:
> On 8/28/19 7:02 PM, Ira Weiny wrote:
> > On Mon, Aug 26, 2019 at 03:55:10PM +1000, Dave Chinner wrote:
> > > On Fri, Aug 23, 2019 at 10:08:36PM -0700, Ira Weiny wrote:
> > > > On Sat, Aug 24, 2019 at
Missed this. sorry.
On Mon, Aug 26, 2019 at 06:41:07AM -0400, Jeff Layton wrote:
> On Thu, 2019-08-15 at 07:56 +1000, Dave Chinner wrote:
> > On Wed, Aug 14, 2019 at 10:15:06AM -0400, Jeff Layton wrote:
> > > On Fri, 2019-08-09 at 15:58 -0700, ira.we...@intel.com wrote:
>
On Fri, Aug 23, 2019 at 11:18:26AM -0400, Vivek Goyal wrote:
> On Fri, Aug 09, 2019 at 03:58:20PM -0700, ira.we...@intel.com wrote:
> > From: Ira Weiny
> >
> > Callers of dax_layout_busy_page() are only rarely operating on the
> > entire file of concern.
> >
On Sat, Aug 24, 2019 at 10:11:24AM +1000, Dave Chinner wrote:
> On Fri, Aug 23, 2019 at 09:04:29AM -0300, Jason Gunthorpe wrote:
> > On Fri, Aug 23, 2019 at 01:23:45PM +1000, Dave Chinner wrote:
> >
> > > > But the fact that RDMA, and potentially others, can "pass the
> > > > pins" to other
On Fri, Aug 23, 2019 at 01:23:45PM +1000, Dave Chinner wrote:
> On Wed, Aug 21, 2019 at 01:44:21PM -0700, Ira Weiny wrote:
> > On Wed, Aug 21, 2019 at 04:48:10PM -0300, Jason Gunthorpe wrote:
> > > On Wed, Aug 21, 2019 at 11:57:03AM -0700, Ira Weiny wrote:
> > >
>
On Mon, Aug 26, 2019 at 03:55:10PM +1000, Dave Chinner wrote:
> On Fri, Aug 23, 2019 at 10:08:36PM -0700, Ira Weiny wrote:
> > On Sat, Aug 24, 2019 at 10:11:24AM +1000, Dave Chinner wrote:
> > > On Fri, Aug 23, 2019 at 09:04:29AM -0300, Jason Gunthorpe wrote:
> > >
>
On Fri, Aug 23, 2019 at 10:59:14AM +1000, Dave Chinner wrote:
> On Wed, Aug 21, 2019 at 11:02:00AM -0700, Ira Weiny wrote:
> > On Tue, Aug 20, 2019 at 08:55:15AM -0300, Jason Gunthorpe wrote:
> > > On Tue, Aug 20, 2019 at 11:12:10AM +1000, Dave Chinner wrote:
> > > >
On Tue, Sep 03, 2019 at 08:26:18AM +1000, Dave Chinner wrote:
> On Wed, Aug 28, 2019 at 07:02:31PM -0700, Ira Weiny wrote:
> > On Mon, Aug 26, 2019 at 03:55:10PM +1000, Dave Chinner wrote:
> > > On Fri, Aug 23, 2019 at 10:08:36PM -0700, Ira Weiny wrote:
> > > > On S
On Wed, Aug 14, 2019 at 09:23:08AM -0300, Jason Gunthorpe wrote:
> On Tue, Aug 13, 2019 at 01:38:59PM -0700, Ira Weiny wrote:
> > On Tue, Aug 13, 2019 at 03:00:22PM -0300, Jason Gunthorpe wrote:
> > > On Tue, Aug 13, 2019 at 10:41:42AM -0700, Ira Weiny wrote:
> > >
&g
From: Ira Weiny
Signed-off-by: Ira Weiny
---
include/linux/nd.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/nd.h b/include/linux/nd.h
index f778f962d1b6..55c735997805 100644
--- a/include/linux/nd.h
+++ b/include/linux/nd.h
@@ -147,7 +147,7 @@ static
this by including linux/acpi.h in nfit_test.h, which allows us to
> remove both the typedef and the forward declaration of acpi_object.
>
> Link: https://github.com/ClangBuiltLinux/linux/issues/660
> Signed-off-by: Nathan Chancellor
Reviewed-by: Ira Weiny
> ---
>
> I know that
From: Ira Weiny
Some subsystems need to pass owning file information to GUP calls to
allow for GUP to associate the "owning file" to any files being pinned
within the GUP call.
Introduce an object to specify this information and pass it down through
some of the GUP call stack.
From: Ira Weiny
ext4 must attempt to break a layout lease if it is held to know if the
layout can be modified.
Split out the logic to determine if a mapping is DAX, export it, and then
break layout leases if a mapping is DAX.
Signed-off-by: Ira Weiny
---
Changes from RFC v1:
Based
From: Ira Weiny
In order to support checking for a layout lease on a FS DAX inode these
calls need to know if FOLL_LONGTERM was specified.
Signed-off-by: Ira Weiny
---
mm/gup.c | 26 +-
1 file changed, 17 insertions(+), 9 deletions(-)
diff --git a/mm/gup.c b/mm/gup.c
From: Ira Weiny
Callers of dax_layout_busy_page() are only rarely operating on the
entire file of concern.
Teach dax_layout_busy_page() to operate on a sub-range of the
address_space provided. Specifying 0 - ULONG_MAX however, will continue
to operate on the "entire file" and XFS is
From: Ira Weiny
Internally GUP fast needs to know that fast users will not support file
pins. Pass NULL for vaddr_pin through the fast call stack so that the
pin code can return an error if it encounters file backed memory within
the address range.
Signed-off-by: Ira Weiny
---
mm/gup.c | 65
From: Ira Weiny
dax_layout_busy_page() can now operate on a sub-range of the
address_space provided.
Have xfs specify the sub range to dax_layout_busy_page()
Signed-off-by: Ira Weiny
---
fs/xfs/xfs_file.c | 19 +--
fs/xfs/xfs_inode.h | 5 +++--
fs/xfs/xfs_ioctl.c | 15
From: Ira Weiny
If pages are under a lease fail the truncate operation. We change the order of
lease breaks to directly fail the operation if the lease exists.
Select EXPORT_BLOCK_OPS for FS_DAX to ensure that xfs_break_lease_layouts() is
defined for FS_DAX as well as pNFS.
Signed-off-by: Ira
From: Ira Weiny
Pre-requisites
==
Based on mmotm tree.
Based on the feedback from LSFmm, the LWN article, the RFC series since
then, and a ton of scenarios I've worked in my mind and/or tested...[1]
Solution summary
The real issue is that there is no use
From: Ira Weiny
User page pins (aka GUP) needs to track file information of files being
pinned by those calls. Depending on the needs of the caller this
information is stored in 1 of 2 ways.
1) Some subsystems like RDMA associate GUP pins with file descriptors
which can be passed around
From: Ira Weiny
In order to support an opt-in policy for users to allow long term pins
of FS DAX pages we need to export the LAYOUT lease to user space.
This is the first of 2 new lease flags which must be used to allow a
long term pin to be made on a file.
After the complete series:
0
From: Ira Weiny
Now that there is a mechanism for users to safely take LONGTERM pins on
FS DAX pages, remove the FS DAX exclusion from the GUP implementation.
Special processing remains in effect for CONFIG_CMA
NOTE: Some callers still fail because the vaddr_pin information has not
been passed
From: Ira Weiny
When a file back area is being pinned add the appropriate file pin
information to the appropriate file or mm owner. This information can
then be used by admins to determine who is causing a failure to change
the layout of a file.
Signed-off-by: Ira Weiny
---
fs/locks.c
From: Ira Weiny
The addition of FOLL_LONGTERM has taken on additional meaning for CMA
pages.
In addition subsystems such as RDMA require new information to be passed
to the GUP interface to track file owning information. As such a simple
FOLL_LONGTERM flag is no longer sufficient
From: Ira Weiny
In order to properly track the pinning information we need to keep a
vaddr_pin object around. Store that within the umem object directly.
The vaddr_pin object allows the GUP code to associate any files it pins
with the RDMA file descriptor associated with this GUP.
Furthermore
From: Ira Weiny
Add an exclusive lease flag which indicates that the layout mechanism
can not be broken.
Exclusive layout leases allow the file system to know that pages may be
GUP pined and that attempts to change the layout, ie truncate, should be
failed.
A process which attempts to break
From: Ira Weiny
On FS DAX files users must inform the file system they intend to take
long term GUP pins on the file pages. Failure to do so should result in
an error.
Ensure that a F_LAYOUT lease exists at the time the GUP call is made.
If not return EPERM.
Signed-off-by: Ira Weiny
From: Ira Weiny
Once callers start to use vaddr_pin the put_user_pages calls will need
to have access to this data coming in. Prep put_user_pages() for this
data.
Signed-off-by: Ira Weiny
---
include/linux/mm.h | 20 +---
mm/gup.c | 122
From: Ira Weiny
In preparation for passing more information (vaddr_pin) into
follow_page_pte(), follow_devmap_pud(), and follow_devmap_pmd().
Signed-off-by: Ira Weiny
---
include/linux/huge_mm.h | 17 -
mm/gup.c| 31 +++
mm
From: Ira Weiny
In order for MRs to be tracked against the open verbs context the ufile
needs to have a pointer to hand to the GUP code.
No references need to be taken as this should be valid for the lifetime
of the context.
Signed-off-by: Ira Weiny
---
drivers/infiniband/core/uverbs.h
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