Sorry, I did not provide any info at all: - Intel i7 sandybridge with 64b kernel - Onboard i915 with two screens is in use As a lucky guess I tried reverting a2f03d58cb16cdcdbbe83e28a00d03254a7840ba: drm/i915: Workaround incoherence between fences and LLC across multiple CPUs. The resulting kernel did not show the problems above and cyclictest is back to around 10us worst case on an idle system. Christoph -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
