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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2020-04-01 23:39:24 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2020-04-02 01:17:39 +0100 |
| commit | 9da0ea09639f35cb91c5f2c44a96d192dad112e1 (patch) | |
| tree | 05bf672e126634afdc94898f3db755f7a0fe04e9 /drivers/gpu/drm/i915/i915_vma.c | |
| parent | 0d86ee35097ae0f1c2c50f2b8035ef480e25e4f1 (diff) | |
| download | linux-9da0ea09639f35cb91c5f2c44a96d192dad112e1.tar.bz2 | |
drm/i915/gem: Drop cached obj->bind_count
We cached the number of vma bound to the object in order to speed up
shrinker decisions. This has been superseded by being more proactive in
removing objects we cannot shrink from the shrinker lists, and so we can
drop the clumsy attempt at atomically counting the bind count and
comparing it to the number of pinned mappings of the object. This will
only get more clumsier with asynchronous binding and unbinding.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200401223924.16667-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_vma.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_vma.c | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index b5f78b0acf5d..4cdd883f9d66 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -608,18 +608,6 @@ bool i915_gem_valid_gtt_space(struct i915_vma *vma, unsigned long color) return true; } -static void assert_bind_count(const struct drm_i915_gem_object *obj) -{ - /* - * Combine the assertion that the object is bound and that we have - * pinned its pages. But we should never have bound the object - * more than we have pinned its pages. (For complete accuracy, we - * assume that no else is pinning the pages, but as a rough assertion - * that we will not run into problems later, this will do!) - */ - GEM_BUG_ON(atomic_read(&obj->mm.pages_pin_count) < atomic_read(&obj->bind_count)); -} - /** * i915_vma_insert - finds a slot for the vma in its address space * @vma: the vma @@ -738,12 +726,6 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 alignment, u64 flags) GEM_BUG_ON(!drm_mm_node_allocated(&vma->node)); GEM_BUG_ON(!i915_gem_valid_gtt_space(vma, color)); - if (vma->obj) { - struct drm_i915_gem_object *obj = vma->obj; - - atomic_inc(&obj->bind_count); - assert_bind_count(obj); - } list_add_tail(&vma->vm_link, &vma->vm->bound_list); return 0; @@ -761,12 +743,6 @@ i915_vma_detach(struct i915_vma *vma) * it to be reaped by the shrinker. */ list_del(&vma->vm_link); - if (vma->obj) { - struct drm_i915_gem_object *obj = vma->obj; - - assert_bind_count(obj); - atomic_dec(&obj->bind_count); - } } static bool try_qad_pin(struct i915_vma *vma, unsigned int flags) |