From: Florian Westphal <fw@strlen.de>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Pablo Neira Ayuso <pablo@netfilter.org>,
Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>,
Florian Westphal <fw@strlen.de>,
netfilter-devel@vger.kernel.org, netdev <netdev@vger.kernel.org>,
Eric Dumazet <edumazet@google.com>
Subject: Re: [PATCH net] netfilter: nf_tables: prefer kfree_rcu(ptr, rcu) variant
Date: Tue, 22 Feb 2022 20:46:05 +0100 [thread overview]
Message-ID: <20220222194605.GA28705@breakpoint.cc> (raw)
In-Reply-To: <20220222181331.811085-1-eric.dumazet@gmail.com>
Eric Dumazet <eric.dumazet@gmail.com> wrote:
> From: Eric Dumazet <edumazet@google.com>
>
> While kfree_rcu(ptr) _is_ supported, it has some limitations.
>
> Given that 99.99% of kfree_rcu() users [1] use the legacy
> two parameters variant, and @catchall objects do have an rcu head,
> simply use it.
>
> Choice of kfree_rcu(ptr) variant was probably not intentional.
In case someone wondered, this causes expensive
sycnhronize_rcu + kfree for each removal operation.
Reviewed-by: Florian Westphal <fw@strlen.de>
next prev parent reply other threads:[~2022-02-22 19:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-22 18:13 [PATCH net] netfilter: nf_tables: prefer kfree_rcu(ptr, rcu) variant Eric Dumazet
2022-02-22 19:46 ` Florian Westphal [this message]
2022-02-22 20:07 ` Eric Dumazet
2022-02-23 8:22 ` Pablo Neira Ayuso
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