The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 3599a91cc8d07542dbeef44034a70ed2d1d1ba98 Mon Sep 17 00:00:00 2001
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Date: Tue, 1 Nov 2016 14:44:10 +0000
Subject: [PATCH] drm/i915: Allow shrinking of userptr objects once again
Commit 1bec9b0bda3d ("drm/i915/shrinker: Only shmemfs objects
are backed by swap") stopped considering the userptr objects
in shrinker callbacks.
Restore that so idle userptr objects can be discarded in order
to free up memory.
One change further to what was introduced in 1bec9b0bda3d is
to start considering userptr objects in oom but that should
also be a correct thing to do.
v2: Introduce I915_GEM_OBJECT_IS_SHRINKABLE. (Chris Wilson)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Fixes: 1bec9b0bda3d ("drm/i915/shrinker: Only shmemfs objects are backed by swap")
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/1478011450-6634-1-git-send-email-tvrtko.ursulin@xxxxxxxxxxxxxxx
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index b8e72cdcb713..f20e24baf95c 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2181,6 +2181,7 @@ enum hdmi_force_audio {
struct drm_i915_gem_object_ops {
unsigned int flags;
#define I915_GEM_OBJECT_HAS_STRUCT_PAGE 0x1
+#define I915_GEM_OBJECT_IS_SHRINKABLE 0x2
/* Interface between the GEM object and its backing storage.
* get_pages() is called once prior to the use of the associated set
@@ -2430,6 +2431,12 @@ i915_gem_object_has_struct_page(const struct drm_i915_gem_object *obj)
}
static inline bool
+i915_gem_object_is_shrinkable(const struct drm_i915_gem_object *obj)
+{
+ return obj->ops->flags & I915_GEM_OBJECT_IS_SHRINKABLE;
+}
+
+static inline bool
i915_gem_object_is_active(const struct drm_i915_gem_object *obj)
{
return obj->active_count;
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 207b8ef85136..a97fdfa80663 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4146,7 +4146,8 @@ void i915_gem_object_init(struct drm_i915_gem_object *obj,
}
static const struct drm_i915_gem_object_ops i915_gem_object_ops = {
- .flags = I915_GEM_OBJECT_HAS_STRUCT_PAGE,
+ .flags = I915_GEM_OBJECT_HAS_STRUCT_PAGE |
+ I915_GEM_OBJECT_IS_SHRINKABLE,
.get_pages = i915_gem_object_get_pages_gtt,
.put_pages = i915_gem_object_put_pages_gtt,
};
diff --git a/drivers/gpu/drm/i915/i915_gem_internal.c b/drivers/gpu/drm/i915/i915_gem_internal.c
index 1b0607a44a9a..4b3ff3e5b911 100644
--- a/drivers/gpu/drm/i915/i915_gem_internal.c
+++ b/drivers/gpu/drm/i915/i915_gem_internal.c
@@ -132,7 +132,8 @@ static void i915_gem_object_put_pages_internal(struct drm_i915_gem_object *obj,
}
static const struct drm_i915_gem_object_ops i915_gem_object_internal_ops = {
- .flags = I915_GEM_OBJECT_HAS_STRUCT_PAGE,
+ .flags = I915_GEM_OBJECT_HAS_STRUCT_PAGE |
+ I915_GEM_OBJECT_IS_SHRINKABLE,
.get_pages = i915_gem_object_get_pages_internal,
.put_pages = i915_gem_object_put_pages_internal,
};
diff --git a/drivers/gpu/drm/i915/i915_gem_shrinker.c b/drivers/gpu/drm/i915/i915_gem_shrinker.c
index f988652f1e26..87dd27d5146c 100644
--- a/drivers/gpu/drm/i915/i915_gem_shrinker.c
+++ b/drivers/gpu/drm/i915/i915_gem_shrinker.c
@@ -83,8 +83,8 @@ static bool can_release_pages(struct drm_i915_gem_object *obj)
if (!obj->mm.pages)
return false;
- /* Only shmemfs objects are backed by swap */
- if (!obj->base.filp)
+ /* Consider only shrinkable ojects. */
+ if (!i915_gem_object_is_shrinkable(obj))
return false;
/* Only report true if by unbinding the object and putting its pages
diff --git a/drivers/gpu/drm/i915/i915_gem_userptr.c b/drivers/gpu/drm/i915/i915_gem_userptr.c
index 9bf44b5bca10..64261639f547 100644
--- a/drivers/gpu/drm/i915/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/i915_gem_userptr.c
@@ -707,7 +707,8 @@ i915_gem_userptr_dmabuf_export(struct drm_i915_gem_object *obj)
}
static const struct drm_i915_gem_object_ops i915_gem_userptr_ops = {
- .flags = I915_GEM_OBJECT_HAS_STRUCT_PAGE,
+ .flags = I915_GEM_OBJECT_HAS_STRUCT_PAGE |
+ I915_GEM_OBJECT_IS_SHRINKABLE,
.get_pages = i915_gem_userptr_get_pages,
.put_pages = i915_gem_userptr_put_pages,
.dmabuf_export = i915_gem_userptr_dmabuf_export,
--
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