Commit 1ed33008 authored Sep 10, 2015 by Wei Liu Committed by Sasha Levin Feb 15, 2016

xen-netback: respect user provided max_queues



[ Upstream commit 4c82ac3c37363e8c4ded6a5fe1ec5fa756b34df3 ]

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.

Reported-by: Johnny Strom <johnny.strom@linuxsolutions.fi>
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

parent 3c02ca42

drivers/net/xen-netback/netback.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -2185,7 +2185,10 @@ static int __init netback_init(void)
		if (!xen_domain())
		return -ENODEV;

		/* Allow as many queues as there are CPUs, by default */
		/* 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();

		if (fatal_skb_slots < XEN_NETBK_LEGACY_SLOTS_MAX) {