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| author | Yuval Mintz <yuvalmin@broadcom.com> | 2012-07-01 03:18:50 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-05 03:06:44 -0700 |
| commit | 16917b87a23b429226527f393270047069d665e9 (patch) | |
| tree | d233f41b31e29688fab779e6885ede9b83f4867b /net/core/dev.c | |
| parent | bf5e53e3717ed28be69d0663c65962d1731e7ee4 (diff) | |
| download | lwn-16917b87a23b429226527f393270047069d665e9.tar.gz lwn-16917b87a23b429226527f393270047069d665e9.zip | |
net-next: Add netif_get_num_default_rss_queues
Most multi-queue networking driver consider the number of online cpus when
configuring RSS queues.
This patch adds a wrapper to the number of cpus, setting an upper limit on the
number of cpus a driver should consider (by default) when allocating resources
for his queues.
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index ed674e212b7a..69f7a1a393d8 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1793,6 +1793,17 @@ int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq) EXPORT_SYMBOL(netif_set_real_num_rx_queues); #endif +/* netif_get_num_default_rss_queues - default number of RSS queues + * + * This routine should set an upper limit on the number of RSS queues + * used by default by multiqueue devices. + */ +int netif_get_num_default_rss_queues() +{ + return min_t(int, DEFAULT_MAX_NUM_RSS_QUEUES, num_online_cpus()); +} +EXPORT_SYMBOL(netif_get_num_default_rss_queues); + static inline void __netif_reschedule(struct Qdisc *q) { struct softnet_data *sd; |