[PATCH v5 1/5] RDMA/umem: Support importing dma-buf as user memory region

[Jason Gunthorpe]

On Thu, Oct 15, 2020 at 03:02:45PM -0700, Jianxin Xiong wrote:

> +static void ib_umem_dmabuf_invalidate_cb(struct dma_buf_attachment *attach)
> +{
> +	struct ib_umem_dmabuf *umem_dmabuf = attach->importer_priv;
> +
> +	dma_resv_assert_held(umem_dmabuf->attach->dmabuf->resv);
> +
> +	ib_umem_dmabuf_unmap_pages(&umem_dmabuf->umem, true);
> +	queue_work(ib_wq, &umem_dmabuf->work);

Do we really want to queue remapping or should it wait until there is
a page fault?

What do GPUs do?

Jason