On Thu 13-06-19 08:27:55, 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 so skips straight
On Thu, Jun 13, 2019 at 01:34:06PM -0700, Ira Weiny wrote:
> 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
On Thu, Jun 13, 2019 at 07:31:07PM -0700, Matthew Wilcox wrote:
> On Fri, Jun 14, 2019 at 12:09:21PM +1000, Dave Chinner wrote:
> > If the lease holder modifies the mapping in a way that causes it's
> > own internal state to screw up, then that's a bug in the lease
> > holder application.
>
>
On Thu, Jun 13, 2019 at 01:34:05PM -0700, Ira Weiny wrote:
> 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
On Fri, Jun 14, 2019 at 12:09:21PM +1000, Dave Chinner wrote:
> On Thu, Jun 13, 2019 at 08:45:30PM -0300, Jason Gunthorpe wrote:
> > On Thu, Jun 13, 2019 at 02:13:21PM -0700, Ira Weiny wrote:
> > > On Thu, Jun 13, 2019 at 08:27:55AM -0700, Matthew Wilcox wrote:
> > > > On Thu, Jun 13, 2019 at
On Thu, Jun 13, 2019 at 08:45:30PM -0300, Jason Gunthorpe wrote:
> On Thu, Jun 13, 2019 at 02:13:21PM -0700, Ira Weiny 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
On Thu, Jun 13, 2019 at 08:45:30PM -0300, Jason Gunthorpe wrote:
> On Thu, Jun 13, 2019 at 02:13:21PM -0700, Ira Weiny 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
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 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 Fri, Jun 07, 2019 at
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:
> > > > Are you suggesting that we have
On Wed, Jun 12, 2019 at 4:32 PM Ira Weiny wrote:
>
> 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,
On Thu, Jun 13, 2019 at 8:14 AM Jason Gunthorpe wrote:
>
> On Wed, Jun 12, 2019 at 06:14:46PM -0700, Dan Williams wrote:
> > > Effectively, we would need a way for an admin to close a specific file
> > > descriptor (or set of fds) which point to that file. AFAIK there is no
> > > way to
> > >
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 so skips straight through layout breaking
> because it owns the lease and
On Thu, Jun 13, 2019 at 02:36:49PM +1000, Dave Chinner wrote:
> On Wed, Jun 12, 2019 at 08:23:20PM -0700, Matthew Wilcox wrote:
> > 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:
> > > > That's rather different
On Wed 12-06-19 15:13:36, 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 12-06-19 08:47:21, Jason Gunthorpe wrote:
> > > > On Wed, Jun 12, 2019 at 12:29:17PM +0200, Jan Kara wrote:
> > >
On Wed 12-06-19 11:49:52, Dan Williams wrote:
> On Wed, Jun 12, 2019 at 3:29 AM Jan Kara wrote:
> >
> > On Fri 07-06-19 07:52:13, Ira Weiny wrote:
> > > 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:
> > > >
> > >
On Wed 12-06-19 11:41:53, Dan Williams wrote:
> On Wed, Jun 12, 2019 at 5:09 AM 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 & DAX solution is that
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:
> > That's rather different from the normal meaning of 'exclusive' in the
> > context of locks, which is "only one user can have access to this at
> > a time".
>
>
On Wed, Jun 12, 2019 at 4:32 PM Ira Weiny wrote:
>
> 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,
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 Fri, Jun 07, 2019 at 11:25:35AM -0700, Ira Weiny wrote:
> > > > Are you suggesting that we have
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?
> > >
> > > fcntl(fd,
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 12-06-19 08:47:21, Jason
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?
> > >
> > > fcntl(fd,
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 12-06-19 08:47:21, Jason Gunthorpe wrote:
> > > > On Wed, Jun 12, 2019 at 12:29:17PM +0200, Jan Kara
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 Wed, Jun 12, 2019 at 3:29 AM Jan Kara wrote:
>
> On Fri 07-06-19 07:52:13, Ira Weiny wrote:
> > 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
On Wed, Jun 12, 2019 at 5:09 AM 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 & DAX solution is that very
> > > > > little HW can actually implement it, having
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?
> >
> > fcntl(fd, F_SETLEASE, F_LAYOUT | F_UNBREAKABLE);
>
> Rather than "unbreakable", perhaps
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 & DAX solution is that very
> > > > little HW can actually implement it, having the alternative still
> > > > require HW support doesn't
On Fri 07-06-19 07:52:13, Ira Weiny wrote:
> 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
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 12:42:03PM +0200, Jan Kara
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 12:42:03PM +0200, Jan Kara wrote:
> > > > On Wed 05-06-19 18:45:33, ira.we...@intel.com 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 12:42:03PM +0200, Jan Kara wrote:
> > > On Wed 05-06-19 18:45:33, ira.we...@intel.com wrote:
> > > > From: Ira Weiny
> > >
> > > So I'd like to actually mandate that
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 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
> >
> > So I'd like to actually mandate that you *must* hold the file lease until
> > you unpin all pages in the
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 ;-)
> > >
> > > Pre-requisites:
> > > John Hubbard's
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 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]
> > Jan Kara's ext4_break_layouts() fixes[2]
> >
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]
> > Jan Kara's ext4_break_layouts() fixes[2]
> >
>
On Thu, Jun 6, 2019 at 3:42 AM 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]
> > Jan Kara's ext4_break_layouts() fixes[2]
> >
> >
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]
> Jan Kara's ext4_break_layouts() fixes[2]
>
> Based on the feedback from LSFmm and the LWN article which resulted.
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]
> Jan Kara's ext4_break_layouts() fixes[2]
>
> Based on the feedback from LSFmm and the LWN article which resulted. I've
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.
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