diff mbox

[net,v2,2/2] xen-netfront: respect user provided max_queues

Message ID 1441794186-26991-3-git-send-email-wei.liu2@citrix.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Wei Liu Sept. 9, 2015, 10:23 a.m. UTC
Originally that parameter was always reset to num_online_cpus during
module initialisation, which renders it useless.

The fix is to only set max_queues to num_online_cpus when user has not
provided a value.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Cc: David Vrabel <david.vrabel@citrix.com>
---
 drivers/net/xen-netfront.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

Comments

David Vrabel Sept. 9, 2015, 10:24 a.m. UTC | #1
On 09/09/15 11:23, Wei Liu wrote:
> Originally that parameter was always reset to num_online_cpus during
> module initialisation, which renders it useless.
> 
> The fix is to only set max_queues to num_online_cpus when user has not
> provided a value.

Reviewed-by: David Vrabel <david.vrabel@citrix.com>

Thanks.

David
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diff mbox

Patch

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index e27e6d2..0b53bd9 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -2132,8 +2132,11 @@  static int __init netif_init(void)
 
 	pr_info("Initialising Xen virtual ethernet driver\n");
 
-	/* Allow as many queues as there are CPUs, by default */
-	xennet_max_queues = num_online_cpus();
+	/* Allow as many queues as there are CPUs if user has not
+	 * specified a value.
+	 */
+	if (xenvif_max_queues == 0)
+		xenvif_max_queues = num_online_cpus();
 
 	return xenbus_register_frontend(&netfront_driver);
 }