Hi, As Ben suggested, explicitly syncing across wrap boundary revealed yet another set of issues that gem_stress didn't find. So here is a patchset which addresses the syncing problems across wrap boundary. Chris helped me to carve out seqno handling ugliness from my initial attempts to handle the ring wrapping. As I can't break this anymore, i added 6/6. --Mika Mika Kuoppala (6): drm/i915: Add debugfs entry to read/write next_seqno drm/i915: Fix debugfs seqno info print to use uint drm/i915: Don't emit semaphore wait if wrap happened drm/i915: Split intel_ring_begin drm/i915: Add intel_ring_handle_seqno wrap drm/i915: Set initial seqno value close to wrap boundary drivers/gpu/drm/i915/i915_debugfs.c | 88 ++++++++++++++++++++++++++++++- drivers/gpu/drm/i915/i915_gem.c | 6 ++- drivers/gpu/drm/i915/intel_ringbuffer.c | 72 +++++++++++++++++++------ drivers/gpu/drm/i915/intel_ringbuffer.h | 2 +- 4 files changed, 148 insertions(+), 20 deletions(-) -- 1.7.9.5
