On Thursday, 11 February 2021 6:55:10 PM AEDT Christoph Hellwig wrote:
> On Wed, Feb 10, 2021 at 01:59:13PM -0400, Jason Gunthorpe wrote:
> > Really what you want to do here is leave the CPU page in the VMA and
> > the page tables where it started and deny CPU access to the page. Then
> > all the p
On 2/10/21 4:59 AM, Daniel Vetter wrote:
...
GPU atomic operations to sysmem are hard to categorize, because because
application
programmers could easily write programs that do a long series of atomic
operations.
Such a program would be a little weird, but it's hard to rule out.
Yeah, but we
On Tue, Feb 09, 2021 at 12:53:27PM -0800, John Hubbard wrote:
> This direction sounds at least...possible. Using MMU notifiers instead of pins
> is definitely appealing. I'm not quite clear on the callback idea above, but
> overall it seems like taking advantage of the ZONE_DEVICE tracking of page
On Tue, Feb 09, 2021 at 04:17:38PM -0500, Jerome Glisse wrote:
> > > Yes, I would like to avoid the long term pin constraints as well if
> > > possible I
> > > just haven't found a solution yet. Are you suggesting it might be
> > > possible to
> > > add a callback in the page migration logic to
On Tue, Feb 09, 2021 at 12:53:27PM -0800, John Hubbard wrote:
> On 2/9/21 5:37 AM, Daniel Vetter wrote:
> > On Tue, Feb 9, 2021 at 1:57 PM Alistair Popple wrote:
> > >
> > > On Tuesday, 9 February 2021 9:27:05 PM AEDT Daniel Vetter wrote:
> > > > >
> > > > > Recent changes to pin_user_pages() pr
On Tue, Feb 09, 2021 at 09:35:20AM -0400, Jason Gunthorpe wrote:
> On Tue, Feb 09, 2021 at 11:57:28PM +1100, Alistair Popple wrote:
> > On Tuesday, 9 February 2021 9:27:05 PM AEDT Daniel Vetter wrote:
> > > >
> > > > Recent changes to pin_user_pages() prevent the creation of pinned pages
> > > > i
On 2/9/21 5:37 AM, Daniel Vetter wrote:
On Tue, Feb 9, 2021 at 1:57 PM Alistair Popple wrote:
On Tuesday, 9 February 2021 9:27:05 PM AEDT Daniel Vetter wrote:
Recent changes to pin_user_pages() prevent the creation of pinned pages in
ZONE_MOVABLE. This series allows pinned pages to be create
On Tue, Feb 09, 2021 at 02:39:51PM +0100, Daniel Vetter wrote:
> Either way ZONE_DEVICE for not vram/device memory sounds wrong. Is
> that really going on here?
My read was this was doing non-coherent atomics on CPU memory.
Atomics on GPU memory is just called migration to GPU memory, it
doesn't
On Tue, Feb 9, 2021 at 2:35 PM Jason Gunthorpe wrote:
>
> On Tue, Feb 09, 2021 at 11:57:28PM +1100, Alistair Popple wrote:
> > On Tuesday, 9 February 2021 9:27:05 PM AEDT Daniel Vetter wrote:
> > > >
> > > > Recent changes to pin_user_pages() prevent the creation of pinned pages
> > > > in
> > >
On Tue, Feb 9, 2021 at 1:57 PM Alistair Popple wrote:
>
> On Tuesday, 9 February 2021 9:27:05 PM AEDT Daniel Vetter wrote:
> > >
> > > Recent changes to pin_user_pages() prevent the creation of pinned pages in
> > > ZONE_MOVABLE. This series allows pinned pages to be created in
> ZONE_MOVABLE
> >
On Tue, Feb 09, 2021 at 11:57:28PM +1100, Alistair Popple wrote:
> On Tuesday, 9 February 2021 9:27:05 PM AEDT Daniel Vetter wrote:
> > >
> > > Recent changes to pin_user_pages() prevent the creation of pinned pages in
> > > ZONE_MOVABLE. This series allows pinned pages to be created in
> ZONE_MOV
On Tuesday, 9 February 2021 9:27:05 PM AEDT Daniel Vetter wrote:
> >
> > Recent changes to pin_user_pages() prevent the creation of pinned pages in
> > ZONE_MOVABLE. This series allows pinned pages to be created in
ZONE_MOVABLE
> > as attempts to migrate may fail which would be fatal to userspace.
On Tue, Feb 09, 2021 at 12:07:13PM +1100, Alistair Popple wrote:
> This series adds support to Nouveau for atomic memory operations on OpenCL
> shared virtual memory (SVM). This is achieved using the atomic PTE bits on
> the GPU to only permit atomic operations to system memory when a page is
> not
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