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

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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>
This commit is contained in:
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; 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)) if (i915_vma_is_pinned(vma))
return true; return true;
}
return false; return false;
} }