netdev - [PATCH 1/1] xen-netfront: limit max queues number to online cpus

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Date:	Fri, 23 Oct 2015 08:50:51 +0800
From:	Joe Jin <joe.jin@...cle.com>
To:	boris.ostrovsky@...cle.com,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, xen-devel@...ts.xenproject.org
Subject: [PATCH 1/1] xen-netfront: limit max queues number to online cpus

Should not allocate queues number more than online cpus.

Signed-off-by: Joe Jin <joe.jin@...cle.com>
Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: David S. Miller <davem@...emloft.net>
---
 drivers/net/xen-netfront.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index f821a97..1eebd4e 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -2137,7 +2137,7 @@ static int __init netif_init(void)
 	/* Allow as many queues as there are CPUs if user has not
 	 * specified a value.
 	 */
-	if (xennet_max_queues == 0)
+	if (xennet_max_queues == 0 || xennet_max_queues > num_online_cpus())
 		xennet_max_queues = num_online_cpus();
 
 	return xenbus_register_frontend(&netfront_driver);
-- 
1.7.1

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