On Wed, Sep 16, 2020 at 11:51 PM Eric Dumazet wrote:
>
> Honestly I would not touch dev_put() at all.
>
> Simply change the msleep(250) to something better, with maybe
> exponential backoff.
OK, I will try that.
Francesco
> static inline void dev_put(struct net_device *dev)
> {
> + struct task_struct *destroy_task = dev->destroy_task;
> +
> this_cpu_dec(*dev->pcpu_refcnt);
> + if (destroy_task)
> + wake_up_process(destroy_task);
> }
I just realized that this introduces a race, i
The combination of aca_free_rcu, introduced in commit 2384d02520ff
("net/ipv6: Add anycast addresses to a global hashtable"), and
fib6_info_destroy_rcu, introduced in commit 9b0a8da8c4c6 ("net/ipv6:
respect rcu grace period before freeing fib6_info"), can result in
an extra rcu grace period being n
