lkml.org 
[lkml]   [2016]   [Feb]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.2.y-ckt 05/64] xen-netfront: respect user provided max_queues
Date
4.2.8-ckt4 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Wei Liu <wei.liu2@citrix.com>

commit 32a844056fd43dda647e1c3c6b9983bdfa04d17d upstream.

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>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Tested-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
drivers/net/xen-netfront.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 5ff0cfd..9b6b933 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -2131,8 +2131,11 @@ 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 (xennet_max_queues == 0)
+ xennet_max_queues = num_online_cpus();

return xenbus_register_frontend(&netfront_driver);
}
--
1.9.1
\
 
 \ /
  Last update: 2016-02-05 00:41    [W:1.525 / U:0.132 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site