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Date:   Thu, 17 Sep 2020 17:40:06 -0700
From:   Francesco Ruggeri <>
To:     Stephen Hemminger <>
Cc:     open list <>,
        netdev <>,
        Cong Wang <>,
        Taehee Yoo <>,
        Andrii Nakryiko <>,
        Eric Dumazet <>,
        Jiri Pirko <>,
        Alexei Starovoitov <>,
        Jakub Kicinski <>,
        David Miller <>
Subject: Re: [PATCH v3] net: use exponential backoff in netdev_wait_allrefs

On Thu, Sep 17, 2020 at 5:02 PM Stephen Hemminger
<> 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.

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