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drm/i915: Only GGTT vma may be pinned and prevent shrinking 

As only GGTT vma may be permanently pinned and are always at the head of
the object's vma list, as soon as we seen a ppGTT vma we can stop
searching for any_vma_pinned().

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170525072528.11185-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
hifive-unleashed-5.1
Chris Wilson 2017-05-25 08:25:28 +01:00
parent 0ef34ad622
commit b2241f182a
1 changed files with 9 additions and 1 deletions
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10
drivers/gpu/drm/i915/i915_gem_shrinker.c
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@ -65,9 +65,17 @@ static bool any_vma_pinned(struct drm_i915_gem_object *obj)
{
struct i915_vma *vma;
list_for_each_entry(vma, &obj->vma_list, obj_link)
list_for_each_entry(vma, &obj->vma_list, obj_link) {
/* Only GGTT vma may be permanently pinned, and are always
* at the start of the list. We can stop hunting as soon
* as we see a ppGTT vma.
*/
if (!i915_vma_is_ggtt(vma))
break;
if (i915_vma_is_pinned(vma))
return true;
}
return false;
}