On Fri, 10 Jan 2020 15:22:02 +0100
Toke Høiland-Jørgensen <toke@xxxxxxxxxx> wrote:
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index 2741aa35bec6..1b2bc2a7522e 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
[...]
> @@ -1993,6 +1994,8 @@ struct net_device {
> spinlock_t tx_global_lock;
> int watchdog_timeo;
>
> + struct xdp_dev_bulk_queue __percpu *xdp_bulkq;
> +
> #ifdef CONFIG_XPS
> struct xps_dev_maps __rcu *xps_cpus_map;
> struct xps_dev_maps __rcu *xps_rxqs_map;
We need to check that the cache-line for this location in struct
net_device is not getting updated (write operation) from different CPUs.
The test you ran was a single queue single CPU test, which will not
show any regression for that case.
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
