# Re: \[PATCH net-next\] net: dsa: User per-cpu 64-bit statistics

- From: Eric Dumazet \<hidden\>
- Date: 2017-08-22 12:56:55 
- List: netdev
- Page: https://ratatoskr.run/netdev/2017/08/5073013
- Thread: https://ratatoskr.run/netdev/2017/08/5059224/t.md

```text
On Mon, 2017-08-21 at 17:10 -0700, Florian Fainelli wrote:

> Well if we return 1 from atomic_inc_return() and the previous value was
> zero, of course we are going to be bugging here. The idea behind the
> patch I suppose is to make sure that we always get an odd number upon
> u64_stats_update_begin()/entry, and an even number upon
> u64_stats_update_end()/exit, right?

Yes, this is right.
```