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

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Date:	Tue, 19 May 2015 16:36:04 +0100
From:	Wei Liu <wei.liu2@...rix.com>
To:	Joao Martins <joao.martins@...lab.eu>
CC:	<xen-devel@...ts.xenproject.org>, <netdev@...r.kernel.org>,
	<wei.liu2@...rix.com>, <ian.campbell@...rix.com>,
	<david.vrabel@...rix.com>, <boris.ostrovsky@...cle.com>,
	<konrad.wilk@...cle.com>
Subject: Re: [RFC PATCH 07/13] xen-netback: add persistent tree counters to
 debugfs

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@...lab.eu>

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

> ---
>  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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