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net: move netdev_max_backlog to net_hotdata

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netdev_max_backlog is used in rx fat path.

Move it to net_hodata for better cache locality.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20240306160031.874438-6-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet
2024-03-06 16:00:18 +00:00
committed by Jakub Kicinski
parent 0b91fa4bfb
commit edbc666cdc
8 changed files with 14 additions and 10 deletions
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8
net/core/dev.c
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@@ -4404,9 +4404,6 @@ EXPORT_SYMBOL(__dev_direct_xmit);
* Receiver routines
*************************************************************************/
int netdev_max_backlog __read_mostly = 1000;
EXPORT_SYMBOL(netdev_max_backlog);
unsigned int sysctl_skb_defer_max __read_mostly = 64;
int weight_p __read_mostly = 64; /* old backlog weight */
int dev_weight_rx_bias __read_mostly = 1; /* bias for backlog weight */
@@ -4713,7 +4710,7 @@ static bool skb_flow_limit(struct sk_buff *skb, unsigned int qlen)
struct softnet_data *sd;
unsigned int old_flow, new_flow;
if (qlen < (READ_ONCE(netdev_max_backlog) >> 1))
if (qlen < (READ_ONCE(net_hotdata.max_backlog) >> 1))
return false;
sd = this_cpu_ptr(&softnet_data);
@@ -4761,7 +4758,8 @@ static int enqueue_to_backlog(struct sk_buff *skb, int cpu,
if (!netif_running(skb->dev))
goto drop;
qlen = skb_queue_len(&sd->input_pkt_queue);
if (qlen <= READ_ONCE(netdev_max_backlog) && !skb_flow_limit(skb, qlen)) {
if (qlen <= READ_ONCE(net_hotdata.max_backlog) &&
!skb_flow_limit(skb, qlen)) {
if (qlen) {
enqueue:
__skb_queue_tail(&sd->input_pkt_queue, skb);