On Mon, Jan 14, 2019 at 04:18:22PM +0200, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@xxxxxxxxxxxx>
>
> Conversion to XArray allows us to mark specific entry with custom flags,
> in our case we need to distinguish between user vs. kernel entries, so drop
> custom boolean flag used before in favour of XAarray mark feature.
Marks are mainly helpful in the xarray if they are used as part of the
iteration with xa_for_each as they significantly reduce the overhead..
> +bool rdma_is_kernel_res(struct rdma_restrack_entry *res)
> +{
> + struct ib_device *dev = res_to_dev(res);
> + struct xarray *xa;
> +
> + xa = rdma_dev_to_xa(dev, res->type);
> +
> + return !xa_get_mark(xa, res_to_id(res), RES_USER_ENTRY);
> +}
> +EXPORT_SYMBOL(rdma_is_kernel_res);
This is now O(log(n)) to save an irrelevant amount of memory.
Jason
