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

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Date:	Tue, 12 May 2015 19:18:31 +0200
From:	Joao Martins <joao.martins@...lab.eu>
To:	<xen-devel@...ts.xenproject.org>, <netdev@...r.kernel.org>
CC:	<wei.liu2@...rix.com>, <ian.campbell@...rix.com>,
	<david.vrabel@...rix.com>, <boris.ostrovsky@...cle.com>,
	<konrad.wilk@...cle.com>, Joao Martins <joao.martins@...lab.eu>
Subject: [RFC PATCH 07/13] xen-netback: add persistent tree counters to debugfs

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>
---
 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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