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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/gem/i915_gem_shrinker.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 This has been superseded by being more proactive in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/gem/i915_gem_shrinker.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_shrinker.c | 18 |
1 files changed, 2 insertions, 16 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c index 03e5eb4c99d1..5b65ce738b16 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c @@ -27,18 +27,6 @@ static bool can_release_pages(struct drm_i915_gem_object *obj) return false; /* - * Only report true if by unbinding the object and putting its pages - * we can actually make forward progress towards freeing physical - * pages. - * - * If the pages are pinned for any other reason than being bound - * to the GPU, simply unbinding from the GPU is not going to succeed - * in releasing our pin count on the pages themselves. - */ - if (atomic_read(&obj->mm.pages_pin_count) > atomic_read(&obj->bind_count)) - return false; - - /* * We can only return physical pages to the system if we can either * discard the contents (because the user has marked them as being * purgeable) or if we can move their contents out to swap. @@ -54,6 +42,8 @@ static bool unsafe_drop_pages(struct drm_i915_gem_object *obj, flags = 0; if (shrink & I915_SHRINK_ACTIVE) flags = I915_GEM_OBJECT_UNBIND_ACTIVE; + if (!(shrink & I915_SHRINK_BOUND)) + flags = I915_GEM_OBJECT_UNBIND_TEST; if (i915_gem_object_unbind(obj, flags) == 0) __i915_gem_object_put_pages(obj); @@ -194,10 +184,6 @@ i915_gem_shrink(struct drm_i915_private *i915, i915_gem_object_is_framebuffer(obj)) continue; - if (!(shrink & I915_SHRINK_BOUND) && - atomic_read(&obj->bind_count)) - continue; - if (!can_release_pages(obj)) continue; |