On 2019-09-03 10:03:35 [+0200], To Clark Williams wrote: > anything in a brief test. What I saw however is that switching to > fullscreen while playing a video gives me ~0.5 to ~2ms latency. This is > has nothing to do with this change, I have to dig deeper… It might be > one of the preempt_disable() section I just noticed. > I would prefer to keep the lock non-raw unless there is actual need for > it. That latency spike is caused by the iommu, qi_submit_sync() to be exact. Without the iomm I don't see much difference between the two patches… Sebastian
