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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2015-10-01 12:18:29 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-10-07 16:05:41 +0200 |
| commit | 5763ff04dc4ebdd13d069d44513b10805ebebd8c (patch) | |
| tree | 8dec95710f402ff7c46e9cd5322fc0289b0ac289 /drivers/gpu/drm/i915/i915_gem_shrinker.c | |
| parent | ce8daef3580ae38fea9599e2193e4c368357c4c6 (diff) | |
| download | op-kernel-dev-5763ff04dc4ebdd13d069d44513b10805ebebd8c.zip op-kernel-dev-5763ff04dc4ebdd13d069d44513b10805ebebd8c.tar.gz | |
drm/i915: Avoid GPU stalls from kswapd
Exclude active GPU pages from the purview of the background shrinker
(kswapd), as these cause uncontrollable GPU stalls. Given that the
shrinker is rerun until the freelists are satisfied, we should have
opportunity in subsequent passes to recover the pages once idle. If the
machine does run out of memory entirely, we have the forced idling in the
oom-notifier as a means of releasing all the pages we can before an oom
is prematurely executed.
Note that this relies upon an up-front retire_requests to keep the
inactive list in shape, which was added in a previous patch, mostly as
execlist ctx pinning band-aids.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
[danvet: Add note about retire_requests.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_shrinker.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_shrinker.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_shrinker.c b/drivers/gpu/drm/i915/i915_gem_shrinker.c index 03cf3cc..f7df54a 100644 --- a/drivers/gpu/drm/i915/i915_gem_shrinker.c +++ b/drivers/gpu/drm/i915/i915_gem_shrinker.c @@ -126,6 +126,9 @@ i915_gem_shrink(struct drm_i915_private *dev_priv, obj->madv != I915_MADV_DONTNEED) continue; + if ((flags & I915_SHRINK_ACTIVE) == 0 && obj->active) + continue; + drm_gem_object_reference(&obj->base); /* For the unbound phase, this should be a no-op! */ @@ -164,7 +167,9 @@ i915_gem_shrink(struct drm_i915_private *dev_priv, unsigned long i915_gem_shrink_all(struct drm_i915_private *dev_priv) { return i915_gem_shrink(dev_priv, -1UL, - I915_SHRINK_BOUND | I915_SHRINK_UNBOUND); + I915_SHRINK_BOUND | + I915_SHRINK_UNBOUND | + I915_SHRINK_ACTIVE); } static bool i915_gem_shrinker_lock(struct drm_device *dev, bool *unlock) @@ -217,7 +222,7 @@ i915_gem_shrinker_count(struct shrinker *shrinker, struct shrink_control *sc) count += obj->base.size >> PAGE_SHIFT; list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) { - if (obj->pages_pin_count == num_vma_bound(obj)) + if (!obj->active && obj->pages_pin_count == num_vma_bound(obj)) count += obj->base.size >> PAGE_SHIFT; } |
