Re: [PATCH 3/3] drm/ttm: remove ttm_bo_wait_unreserved

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On 8/20/19 4:53 PM, Daniel Vetter wrote:
With nouveau fixed all ttm-using drives have the correct nesting of
mmap_sem vs dma_resv, and we can just lock the buffer.

Assuming I didn't screw up anything with my audit of course.

Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Cc: Christian Koenig <christian.koenig@xxxxxxx>
Cc: Huang Rui <ray.huang@xxxxxxx>
Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Cc: "VMware Graphics" <linux-graphics-maintainer@xxxxxxxxxx>
Cc: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
---
  drivers/gpu/drm/ttm/ttm_bo.c    | 34 ---------------------------------
  drivers/gpu/drm/ttm/ttm_bo_vm.c | 26 +------------------------
  include/drm/ttm/ttm_bo_api.h    |  1 -
  3 files changed, 1 insertion(+), 60 deletions(-)


+	dma_resv_lock(bo->base.resv, NULL);

interruptible, or at least killable. (IIRC think killable is the right choice in fault code, even if TTM initially implemented interruptible to get reasonable Xorg "silken mouse" latency).

Thanks,
/Thomas


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