From 178a30c90ac74e661eb8c3703eff0daaa0aaf38f Mon Sep 17 00:00:00 2001 From: Praveen Paneri Date: Mon, 2 May 2016 14:10:28 +0530 Subject: [PATCH] drm/i915: Unbind objects in shrinker only if device is runtime active When the system is running low on memory, gem shrinker is invoked. In this process objects will be unbounded from GTT and unbinding process will require access to GTT(GTTADR) and also to fence register potentially. That requires a resume of gfx device, if suspended, in the shrinker path. Considering the power leakage due to intermediate resume, perform unbinding operation only if device is already runtime active. v2: Use newly implemented intel_runtime_pm_get_if_in_use (Chris) Signed-off-by: Akash Goel Signed-off-by: Praveen Paneri Reviewed-by: Chris Wilson Signed-off-by: Chris Wilson Link: http://patchwork.freedesktop.org/patch/msgid/1462178429-13449-1-git-send-email-praveen.paneri@intel.com Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/i915_gem_shrinker.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem_shrinker.c b/drivers/gpu/drm/i915/i915_gem_shrinker.c index 2643d18..9a24415 100644 --- a/drivers/gpu/drm/i915/i915_gem_shrinker.c +++ b/drivers/gpu/drm/i915/i915_gem_shrinker.c @@ -134,6 +134,15 @@ i915_gem_shrink(struct drm_i915_private *dev_priv, i915_gem_retire_requests(dev_priv->dev); /* + * Unbinding of objects will require HW access; Let us not wake the + * device just to recover a little memory. If absolutely necessary, + * we will force the wake during oom-notifier. + */ + if ((flags & I915_SHRINK_BOUND) && + !intel_runtime_pm_get_if_in_use(dev_priv)) + flags &= ~I915_SHRINK_BOUND; + + /* * As we may completely rewrite the (un)bound list whilst unbinding * (due to retiring requests) we have to strictly process only * one element of the list at the time, and recheck the list @@ -197,6 +206,9 @@ i915_gem_shrink(struct drm_i915_private *dev_priv, list_splice(&still_in_list, phase->list); } + if (flags & I915_SHRINK_BOUND) + intel_runtime_pm_put(dev_priv); + i915_gem_retire_requests(dev_priv->dev); return count; -- 2.7.4