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
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 proper machinery will continue to work.
>
> IMHO "migration" is the wrong idea
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
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
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()
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
> > > >
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
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
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
>
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
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
>
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 mapped in userspace on the CPU.
This is implemented by adding a mode
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