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| author | Eric Dumazet <edumazet@google.com> | 2022-03-10 21:14:20 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-03-11 23:17:24 -0800 |
| commit | 625788b5844511cf4c30cffa7fa0bc3a69cebc82 (patch) | |
| tree | 1b1b091212352474f56d6c4497017bc206c7c785 /drivers/net/net_failover.c | |
| parent | a8c063372bff46ed8f94c87cfac45a3ce016a380 (diff) | |
| download | linux-625788b5844511cf4c30cffa7fa0bc3a69cebc82.tar.bz2 | |
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/net_failover.c')
| -rw-r--r-- | drivers/net/net_failover.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/net_failover.c b/drivers/net/net_failover.c index 86ec5aae4289..21a0435c02de 100644 --- a/drivers/net/net_failover.c +++ b/drivers/net/net_failover.c @@ -89,7 +89,7 @@ static int net_failover_close(struct net_device *dev) static netdev_tx_t net_failover_drop_xmit(struct sk_buff *skb, struct net_device *dev) { - atomic_long_inc(&dev->tx_dropped); + dev_core_stats_tx_dropped_inc(dev); dev_kfree_skb_any(skb); return NETDEV_TX_OK; } |