From: Jesse Gross <jesse@nicira.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Miller <davem@davemloft.net>, netdev <netdev@vger.kernel.org>
Subject: Re: [PATCH net-next-2.6] net: inet_add_protocol() can use cmpxchg()
Date: Wed, 8 Sep 2010 16:49:27 -0700 [thread overview]
Message-ID: <AANLkTimZ=i1=c3SaEsw2_ncWJenuOgoSmHpMuN_UiG4K@mail.gmail.com> (raw)
In-Reply-To: <1283986576.2428.21.camel@edumazet-laptop>
On Wed, Sep 8, 2010 at 3:56 PM, Eric Dumazet <eric.dumazet@gmail.com> wrote:
> Use cmpxchg() to get rid of spinlocks in inet_add_protocol() and
> friends.
>
> inet_protos[] & inet6_protos[] are moved to read_mostly section
>
> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
What's the benefit to this? It's hard to imagine that add/deleting
protocols is highly contended. On the other hand, a simple spinlock
is very easy to look at and verify correct, while this takes a little
more thought.
next prev parent reply other threads:[~2010-09-08 23:49 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-08 22:56 [PATCH net-next-2.6] net: inet_add_protocol() can use cmpxchg() Eric Dumazet
2010-09-08 23:49 ` Jesse Gross [this message]
2010-09-09 4:30 ` David Miller
2010-09-09 6:42 ` Jarek Poplawski
2010-09-09 6:55 ` Eric Dumazet
2010-09-09 7:09 ` Jarek Poplawski
2010-09-09 7:24 ` Jarek Poplawski
2010-09-09 9:08 ` Jarek Poplawski
2010-09-09 9:23 ` Eric Dumazet
2010-09-09 9:42 ` Jarek Poplawski
2010-09-09 9:59 ` Jarek Poplawski
2010-09-09 12:57 ` Eric Dumazet
2010-09-09 15:38 ` Jarek Poplawski
2010-09-09 5:23 ` Eric Dumazet
2010-09-09 4:31 ` David Miller
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