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net: fix softnet_stat

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Per cpu variable softnet_data.total was shared between IRQ and SoftIRQ context
without any protection. And enqueue_to_backlog should update the netdev_rx_stat
of the target CPU.

This patch renames softnet_data.total to softnet_data.processed: the number of
packets processed in uppper levels(IP stacks).

softnet_stat data is moved into softnet_data.

Signed-off-by: Changli Gao <[email protected]>
----
 include/linux/netdevice.h |   17 +++++++----------
 net/core/dev.c            |   26 ++++++++++++--------------
 net/sched/sch_generic.c   |    2 +-
 3 files changed, 20 insertions(+), 25 deletions(-)
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Changli Gao 2010-05-02 05:42:16 +00:00 • committed by David S. Miller
commit dee42870a4
3 changed files with 20 additions and 25 deletions
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2
net/sched/sch_generic.c
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@ -94,7 +94,7 @@ static inline int handle_dev_cpu_collision(struct sk_buff *skb,
* Another cpu is holding lock, requeue & delay xmits for
* some time.
*/
__get_cpu_var(netdev_rx_stat).cpu_collision++;
__get_cpu_var(softnet_data).cpu_collision++;
ret = dev_requeue_skb(skb, q);
}