From: Chris Wilson Date: Thu, 4 Aug 2016 06:52:39 +0000 (+0100) Subject: drm/i915: Disable waitboosting for a saturated engine X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=37db14700e995aa7b74e09b2a1bfe786f0db0121;p=linux-beck.git drm/i915: Disable waitboosting for a saturated engine If the user floods the GPU with so many requests that the engine stalls waiting for free space, don't automatically promote the GPU to maximum frequencies. If the GPU really is saturated with work, it will migrate to high clocks by itself, otherwise it is merely a user flooding us with busy-work. Signed-off-by: Chris Wilson Reviewed-by: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/1470293567-10811-20-git-send-email-chris@chris-wilson.co.uk --- diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 542cf585121c..4ab6d2365e30 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -2299,7 +2299,7 @@ static int wait_for_space(struct drm_i915_gem_request *req, int bytes) if (WARN_ON(&target->ring_link == &ring->request_list)) return -ENOSPC; - ret = __i915_wait_request(target, true, NULL, NULL); + ret = __i915_wait_request(target, true, NULL, NO_WAITBOOST); if (ret) return ret;