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xen-netback: respect user provided max_queues

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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 <[email protected]>
Signed-off-by: Wei Liu <[email protected]>
Reviewed-by: David Vrabel <[email protected]>
Acked-by: Ian Campbell <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Wei Liu 2015-09-10 11:18:57 +01:00 • committed by David S. Miller
commit 4c82ac3c37
1 changed files with 5 additions and 2 deletions
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7
drivers/net/xen-netback/netback.c
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@ -2114,8 +2114,11 @@ static int __init netback_init(void)
if (!xen_domain())
return -ENODEV;
/* Allow as many queues as there are CPUs, by default */
xenvif_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();
if (fatal_skb_slots < XEN_NETBK_LEGACY_SLOTS_MAX) {
pr_info("fatal_skb_slots too small (%d), bump it to XEN_NETBK_LEGACY_SLOTS_MAX (%d)\n",