[Intel-gfx] [PATCH 01/20] drm/atomic: Fix remaining places where !funcs->best_encoder is valid
From: Chris Wilson <hidden>
Date: 2016-06-02 22:40:28
Also in:
dri-devel, intel-gfx, linux-arm-msm, linux-mediatek, linux-renesas-soc, linux-rockchip, linux-samsung-soc, linux-tegra, lkml
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