[Intel-gfx] [PATCH 7/7] drm/i915/gem: Acquire all vma/objects under reservation_ww_class

[Chris Wilson]

Quoting Dave Airlie (2020-06-23 22:01:24)
> On Tue, 23 Jun 2020 at 20:03, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> >
> > Quoting Thomas Hellström (Intel) (2020-06-23 10:33:20)
> > > Hi, Chris!
> > >
> > > On 6/22/20 11:59 AM, Chris Wilson wrote:
> > > > In order to actually handle eviction and what not, we need to process
> > > > all the objects together under a common lock, reservation_ww_class. As
> > > > such, do a memory reservation pass after looking up the object/vma,
> > > > which then feeds into the rest of execbuf [relocation, cmdparsing,
> > > > flushing and ofc execution].
> > > >
> > > > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> > > > ---
> > > >   .../gpu/drm/i915/gem/i915_gem_execbuffer.c    | 91 ++++++++++++++-----
> > > >   1 file changed, 70 insertions(+), 21 deletions(-)
> > > >
> > > Which tree is this against? The series doesn't apply cleanly against
> > > drm-tip?
> >
> > It's continuing on from the scheduler patches, the bug fixes and the
> > iris-deferred-fence work. I thought throwing all of those old patches
> > into the pile would have been distracting.
> >
> > > ...
> > >
> > > > +static int eb_reserve_mm(struct i915_execbuffer *eb)
> > > > +{
> > > > +     const u64 idx = eb->context->timeline->fence_context;
> > > > +     struct ww_acquire_ctx acquire;
> > > > +     struct eb_vma *ev;
> > > > +     int err;
> > > > +
> > > > +     eb->mm_fence = __dma_fence_create_proxy(0, 0);
> > > > +     if (!eb->mm_fence)
> > > > +             return -ENOMEM;
> > >
> > > Where are the proxy fence functions defined?
> >
> > In dma-fence-proxy.c ;)
> 
> The dma-fence-proxy that Christian NAKed before?

I do not have an email from Christian about dma-fence-proxy in the last
3 years it has been on the list.
-Chris