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authorEric Dumazet <edumazet@google.com>2022-03-11 08:14:20 +0300
committerJakub Kicinski <kuba@kernel.org>2022-03-12 10:17:24 +0300
commit625788b5844511cf4c30cffa7fa0bc3a69cebc82 (patch)
tree1b1b091212352474f56d6c4497017bc206c7c785 /drivers/net/ethernet/qualcomm
parenta8c063372bff46ed8f94c87cfac45a3ce016a380 (diff)
downloadlinux-625788b5844511cf4c30cffa7fa0bc3a69cebc82.tar.xz
net: add per-cpu storage and net->core_stats
Before adding yet another possibly contended atomic_long_t, it is time to add per-cpu storage for existing ones: dev->tx_dropped, dev->rx_dropped, and dev->rx_nohandler Because many devices do not have to increment such counters, allocate the per-cpu storage on demand, so that dev_get_stats() does not have to spend considerable time folding zero counters. Note that some drivers have abused these counters which were supposed to be only used by core networking stack. v4: should use per_cpu_ptr() in dev_get_stats() (Jakub) v3: added a READ_ONCE() in netdev_core_stats_alloc() (Paolo) v2: add a missing include (reported by kernel test robot <lkp@intel.com>) Change in netdev_core_stats_alloc() (Jakub) Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: jeffreyji <jeffreyji@google.com> Reviewed-by: Brian Vazquez <brianvv@google.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Paolo Abeni <pabeni@redhat.com> Link: https://lore.kernel.org/r/20220311051420.2608812-1-eric.dumazet@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/qualcomm')
-rw-r--r--drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
index bfbd7847f946..a313242a762e 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
@@ -207,7 +207,7 @@ rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb)
dev = skb->dev;
port = rmnet_get_port_rcu(dev);
if (unlikely(!port)) {
- atomic_long_inc(&skb->dev->rx_nohandler);
+ dev_core_stats_rx_nohandler_inc(skb->dev);
kfree_skb(skb);
goto done;
}