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Re: [Intel-gfx] [PATCH 01/20] drm/atomic: Fix remaining places where !funcs->best_encoder is valid

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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

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[PATCH 00/20] drm/atomic: Provide default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 18/20] drm/bridge: ptn3460: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 15/20] drm: virtgpu: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 10/20] drm: rockchip: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
    Re: [PATCH 10/20] drm: rockchip: Rely on the default ->best_encoder()  behavior Mark yao <mark.yao@rock-chips.com> - 2016-06-07 03:00 +0200
  [PATCH 03/20] drm: atmel-hlcdc: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 05/20] drm: fsl-dcu: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 19/20] drm/bridge: ps8622: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 13/20] drm: tegra: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 07/20] drm: mediatek: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 17/20] drm/bridge: anx78xx: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 09/20] drm: rcar-du: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
    Re: [PATCH 09/20] drm: rcar-du: Rely on the default ->best_encoder() behavior Laurent Pinchart <laurent.pinchart@ideasonboard.com> - 2016-06-02 23:00 +0200
      Re: [PATCH 09/20] drm: rcar-du: Rely on the default  ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-03 09:40 +0200
  [PATCH 14/20] drm: vc4: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 08/20] drm: msm: Rely on the default ->best_encoder() behavior where appropriate Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 04/20] drm: exynos: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 16/20] drm: omap: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
    Re: [PATCH 16/20] drm: omap: Rely on the default ->best_encoder() behavior Laurent Pinchart <laurent.pinchart@ideasonboard.com> - 2016-06-02 23:10 +0200
  [PATCH 12/20] drm: sun4i: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 02/20] drm: arc: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 20/20] drm/bridge: dw-hdmi: Use drm_atomic_helper_best_encoder() Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 06/20] drm: i915: Rely on the default ->best_encoder() behavior where appropriate Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
  [PATCH 01/20] drm/atomic: Fix remaining places where !funcs->best_encoder is valid Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200
    Re: [PATCH 01/20] drm/atomic: Fix remaining places where !funcs->best_encoder is valid Laurent Pinchart <laurent.pinchart@ideasonboard.com> - 2016-06-02 23:10 +0200
      Re: [PATCH 01/20] drm/atomic: Fix remaining places where  !funcs->best_encoder is valid Daniel Vetter <daniel@ffwll.ch> - 2016-06-03 00:00 +0200
        Re: [Intel-gfx] [PATCH 01/20] drm/atomic: Fix remaining places where  !funcs->best_encoder is valid Chris Wilson <chris@chris-wilson.co.uk> - 2016-06-03 00:50 +0200
        Re: [PATCH 01/20] drm/atomic: Fix remaining places where  !funcs->best_encoder is valid Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-03 09:40 +0200
          Re: [PATCH 01/20] drm/atomic: Fix remaining places where  !funcs->best_encoder is valid Daniel Vetter <daniel@ffwll.ch> - 2016-06-03 21:10 +0200
      Re: [PATCH 01/20] drm/atomic: Fix remaining places where  !funcs->best_encoder is valid Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-03 09:40 +0200
  [PATCH 11/20] drm: sti: Rely on the default ->best_encoder() behavior Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-06-02 16:40 +0200

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