Re: [Xen-devel] [RFC PATCH 07/13] xen-netback: add persistent tree counters to debugfs

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Tue, May 12, 2015 at 07:18:31PM +0200, Joao Martins wrote:
> Prints the total/max number of persistent grants and how many of
> them are in use.
> 
> Signed-off-by: Joao Martins <joao.martins@xxxxxxxxx>

Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>

> ---
>  drivers/net/xen-netback/xenbus.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/net/xen-netback/xenbus.c 
> b/drivers/net/xen-netback/xenbus.c
> index 766f7e5..1e6f27a 100644
> --- a/drivers/net/xen-netback/xenbus.c
> +++ b/drivers/net/xen-netback/xenbus.c
> @@ -121,6 +121,17 @@ static int xenvif_read_io_ring(struct seq_file *m, void 
> *v)
>                  skb_queue_len(&queue->rx_queue),
>                  netif_tx_queue_stopped(dev_queue) ? "stopped" : "running");
>  
> +     if (queue->vif->persistent_grants) {
> +             seq_printf(m, "\nRx persistent_gnts: in_use %d max %d gnts 
> %d\n",
> +                        atomic_read(&queue->rx_gnts_tree.gnt_in_use),
> +                        queue->rx_gnts_tree.gnt_max,
> +                        queue->rx_gnts_tree.gnt_c);
> +             seq_printf(m, "\nTx persistent_gnts: in_use %d max %d gnts 
> %d\n",
> +                        atomic_read(&queue->tx_gnts_tree.gnt_in_use),
> +                        queue->tx_gnts_tree.gnt_max,
> +                        queue->tx_gnts_tree.gnt_c);
> +     }
> +
>       return 0;
>  }
>  
> -- 
> 2.1.3

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