From 1830374e1332c93f65399687b72ff55ca4d8c978 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 7 May 2019 13:11:07 +0100 Subject: drm/i915: Cancel retire_worker on parking Replace the racy continuation check within retire_work with a definite kill-switch on idling. The race was being exposed by gem_concurrent_blit where the retire_worker would be terminated too early leaving us spinning in debugfs/i915_drop_caches with nothing flushing the retirement queue. Although that the igt is trying to idle from one child while submitting from another may be a contributing factor as to why it runs so slowly... v2: Use the non-sync version of cancel_delayed_work(), we only need to stop it from being scheduled as we independently check whether now is the right time to be parking. Testcase: igt/gem_concurrent_blit Fixes: 79ffac8599c4 ("drm/i915: Invert the GEM wakeref hierarchy") Signed-off-by: Chris Wilson Cc: Tvrtko Ursulin Reviewed-by: Tvrtko Ursulin Link: https://patchwork.freedesktop.org/patch/msgid/20190507121108.18377-3-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/selftests/mock_gem_device.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/gpu/drm/i915/selftests') diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c index d919f512042c..9fd02025d382 100644 --- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c +++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c @@ -58,7 +58,6 @@ static void mock_device_release(struct drm_device *dev) i915_gem_contexts_lost(i915); mutex_unlock(&i915->drm.struct_mutex); - drain_delayed_work(&i915->gem.retire_work); flush_work(&i915->gem.idle_work); i915_gem_drain_workqueue(i915); -- cgit v1.2.3