[Intel-gfx] [PATCH 1/9] drm/i915: Reference objects on the ww object list

[Matthew Auld]

On Tue, 8 Jun 2021 at 10:29, Thomas Hellström
<thomas.hellstrom at linux.intel.com> wrote:
>
> Since the ww transaction endpoint easily end up far out-of-scope of
> the objects on the ww object list, particularly for contending lock
> objects, make sure we reference objects on the list so they don't
> disappear under us.
>
> This comes with a performance penalty so it's been debated whether this
> is really needed. But I think this is motivated by the fact that locking
> is typically difficult to get right, and whatever we can do to make it
> simpler for developers moving forward should be done, unless the
> performance impact is far too high.
>
> Signed-off-by: Thomas Hellström <thomas.hellstrom at linux.intel.com>
Reviewed-by: Matthew Auld <matthew.auld at intel.com>