On Thu, Jun 02, 2016 at 11:57:02PM +0200, Daniel Vetter wrote: > drm_encoder_find is an idr lookup. That should be plenty fast, > especially for modeset code. Usually what's too expensive even for > modeset code is linear list walks. But Chris just submitted patches to > convert most of them into simple lookups. For the idr_find, I'm tempted to replace the mutex with a rwlock. It helps pathological cases, but in reality there are more crucial locks around the hw that limit concurrency. ;-) -Chris -- Chris Wilson, Intel Open Source Technology Centre
