drm/i915: Include bound and active pages in the count of shrinkable objects
When the machine is under a lot of memory pressure and being stressed by
multiple GPU threads, we quite often report fewer than shrinker->batch
(i.e. SHRINK_BATCH) pages to be freed. This causes the shrink_control to
skip calling into i915.ko to release pages, despite the GPU holding onto
most of the physical pages in its active lists.
References: https://bugs.freedesktop.org/show_bug.cgi?id=72742
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Robert Beckett <robert.beckett@intel.com>
Reviewed-by: Rafael Barbalho <rafael.barbalho@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index f0e4c56..fa46d98 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -57,9 +57,9 @@
struct drm_i915_fence_reg *fence,
bool enable);
-static unsigned long i915_gem_inactive_count(struct shrinker *shrinker,
+static unsigned long i915_gem_shrinker_count(struct shrinker *shrinker,
struct shrink_control *sc);
-static unsigned long i915_gem_inactive_scan(struct shrinker *shrinker,
+static unsigned long i915_gem_shrinker_scan(struct shrinker *shrinker,
struct shrink_control *sc);
static unsigned long i915_gem_purge(struct drm_i915_private *dev_priv, long target);
static unsigned long i915_gem_shrink_all(struct drm_i915_private *dev_priv);
@@ -4739,10 +4739,10 @@
dev_priv->mm.interruptible = true;
- dev_priv->mm.inactive_shrinker.scan_objects = i915_gem_inactive_scan;
- dev_priv->mm.inactive_shrinker.count_objects = i915_gem_inactive_count;
- dev_priv->mm.inactive_shrinker.seeks = DEFAULT_SEEKS;
- register_shrinker(&dev_priv->mm.inactive_shrinker);
+ dev_priv->mm.shrinker.scan_objects = i915_gem_shrinker_scan;
+ dev_priv->mm.shrinker.count_objects = i915_gem_shrinker_count;
+ dev_priv->mm.shrinker.seeks = DEFAULT_SEEKS;
+ register_shrinker(&dev_priv->mm.shrinker);
}
/*
@@ -5001,13 +5001,23 @@
#endif
}
+static int num_vma_bound(struct drm_i915_gem_object *obj)
+{
+ struct i915_vma *vma;
+ int count = 0;
+
+ list_for_each_entry(vma, &obj->vma_list, vma_link)
+ if (drm_mm_node_allocated(&vma->node))
+ count++;
+
+ return count;
+}
+
static unsigned long
-i915_gem_inactive_count(struct shrinker *shrinker, struct shrink_control *sc)
+i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc)
{
struct drm_i915_private *dev_priv =
- container_of(shrinker,
- struct drm_i915_private,
- mm.inactive_shrinker);
+ container_of(shrinker, struct drm_i915_private, mm.shrinker);
struct drm_device *dev = dev_priv->dev;
struct drm_i915_gem_object *obj;
bool unlock = true;
@@ -5029,10 +5039,8 @@
count += obj->base.size >> PAGE_SHIFT;
list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
- if (obj->active)
- continue;
-
- if (!i915_gem_obj_is_pinned(obj) && obj->pages_pin_count == 0)
+ if (!i915_gem_obj_is_pinned(obj) &&
+ obj->pages_pin_count == num_vma_bound(obj))
count += obj->base.size >> PAGE_SHIFT;
}
@@ -5105,12 +5113,10 @@
}
static unsigned long
-i915_gem_inactive_scan(struct shrinker *shrinker, struct shrink_control *sc)
+i915_gem_shrinker_scan(struct shrinker *shrinker, struct shrink_control *sc)
{
struct drm_i915_private *dev_priv =
- container_of(shrinker,
- struct drm_i915_private,
- mm.inactive_shrinker);
+ container_of(shrinker, struct drm_i915_private, mm.shrinker);
struct drm_device *dev = dev_priv->dev;
unsigned long freed;
bool unlock = true;