netdev - Re: [PATCH v3 net] af_unix: Do not call kmemdup() for init

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Date:   Tue, 28 Jun 2022 20:51:25 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Kuniyuki Iwashima <kuniyu@...zon.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Pavel Emelyanov <xemul@...nvz.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Kuniyuki Iwashima <kuni1840@...il.com>,
        <netdev@...r.kernel.org>
Subject: Re: [PATCH v3 net] af_unix: Do not call kmemdup() for init_net's
 sysctl table.

On Mon, 27 Jun 2022 16:36:27 -0700 Kuniyuki Iwashima wrote:
> While setting up init_net's sysctl table, we need not duplicate the
> global table and can use it directly as ipv4_sysctl_init_net() does.
> 
> Unlike IPv4, AF_UNIX does not have a huge sysctl table for now, so it
> cannot be a problem, but this patch makes code consistent.

Thanks for the extra info. It sounds like an optimization, tho.
We save one table's worth of memory. Any objections to applying
this to net-next?

> Fixes: 1597fbc0faf8 ("[UNIX]: Make the unix sysctl tables per-namespace")
> Acked-by: Eric W. Biederman <ebiederm@...ssion.com>
> Signed-off-by: Kuniyuki Iwashima <kuniyu@...zon.com>