Re: [PATCH v3] net: use exponential backoff in netdev_wait_allrefs

From: Francesco Ruggeri
Date: Thu Sep 17 2020 - 20:40:21 EST

On Thu, Sep 17, 2020 at 5:02 PM Stephen Hemminger
<stephen@xxxxxxxxxxxxxxxxxx> wrote:
> Is there anyway to make RCU trigger faster?

This is a case of the networking code requiring multiple cascading grace periods
(functions executing at the end of a period scheduling more functions
for the end
of the next period), so it's a matter of how many steps are required,
rather than
how fast each step is, if that is what you are suggesting. I don't
think that expediting
rcu periods would help in this case, but I will defer to people with better
knowledge of the networking code than me to comment.