Messages in this thread | | | Date | Thu, 4 Jul 2019 13:10:43 +0200 | From | Gerd Hoffmann <> | Subject | Re: [PATCH v6 06/18] drm/virtio: remove ttm calls from in virtio_gpu_object_{reserve,unreserve} |
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Hi,
> > - r = ttm_bo_reserve(&bo->tbo, true, false, NULL); > > + r = reservation_object_lock_interruptible(bo->gem_base.resv, NULL); > Can you elaborate a bit about how TTM keeps the BOs alive in, for > example, virtio_gpu_transfer_from_host_ioctl? In that function, only > three TTM functions are called: ttm_bo_reserve, ttm_bo_validate, and > ttm_bo_unreserve. I am curious how they keep the BO alive.
It can't go away between reserve and unreserve, and I think it also can't be evicted then. Havn't checked how ttm implements that.
cheers, Gerd
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