From: Cyrill Gorcunov <gorcunov@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: alexei.starovoitov@gmail.com, eric.dumazet@gmail.com,
netdev@vger.kernel.org, solar@openwall.com, vvs@virtuozzo.com,
avagin@virtuozzo.com, xemul@virtuozzo.com,
vdavydov@virtuozzo.com, khorenko@virtuozzo.com,
pablo@netfilter.org, netfilter-devel@vger.kernel.org
Subject: Re: [RFC] net: ipv4 -- Introduce ifa limit per net
Date: Thu, 10 Mar 2016 21:48:03 +0300 [thread overview]
Message-ID: <20160310184803.GD21154@uranus.lan> (raw)
In-Reply-To: <20160310.130138.1302349043066531127.davem@davemloft.net>
On Thu, Mar 10, 2016 at 01:01:38PM -0500, David Miller wrote:
> From: Cyrill Gorcunov <gorcunov@gmail.com>
> Date: Thu, 10 Mar 2016 18:09:20 +0300
>
> > On Thu, Mar 10, 2016 at 02:03:24PM +0300, Cyrill Gorcunov wrote:
> >> On Thu, Mar 10, 2016 at 01:20:18PM +0300, Cyrill Gorcunov wrote:
> >> > On Thu, Mar 10, 2016 at 12:16:29AM +0300, Cyrill Gorcunov wrote:
> >> > >
> >> > > Thanks for explanation, Dave! I'll continue on this task tomorrow
> >> > > tryin to implement optimization you proposed.
> >> >
> >> > OK, here are the results for the preliminary patch with conntrack running
> >> ...
> >> > net/ipv4/devinet.c | 13 ++++++++++++-
> >> > 1 file changed, 12 insertions(+), 1 deletion(-)
> >> >
> >> > Index: linux-ml.git/net/ipv4/devinet.c
> >> > ===================================================================
> >> > --- linux-ml.git.orig/net/ipv4/devinet.c
> >> > +++ linux-ml.git/net/ipv4/devinet.c
> >> > @@ -403,7 +403,18 @@ no_promotions:
> >> > So that, this order is correct.
> >> > */
> >>
> >> This patch is wrong, so drop it please. I'll do another.
> >
> > Here I think is a better variant. The resulst are good
> > enough -- 1 sec for cleanup. Does the patch look sane?
>
> I'm tempted to say that we should provide these notifier handlers with
> the information they need, explicitly, to handle this case.
>
> Most intdev notifiers actually want to know the individual addresses
> that get removed, one by one. That's handled by the existing
> NETDEV_DOWN event and the ifa we pass to that.
>
> But some, like this netfilter masq case, would be satisfied with a
> single event that tells them the whole inetdev instance is being torn
> down. Which is the case we care about here.
>
> We currently don't use NETDEV_UNREGISTER for inetdev notifiers, so
> maybe we could use that.
>
> And that is consistent with the core netdev notifier that triggers
> this call chain in the first place.
>
> Roughly, something like this:
I see. Dave, gimme some time to test but I'm sure it'll work.
I don't have some strong opinion here, so your patch looks
pretty fine to me. But maybe people from netdev camp have
some other ideas.
next prev parent reply other threads:[~2016-03-10 18:48 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-04 21:39 [RFC] net: ipv4 -- Introduce ifa limit per net Cyrill Gorcunov
2016-03-04 22:50 ` David Miller
2016-03-05 0:08 ` Eric Dumazet
2016-03-05 4:11 ` David Miller
2016-03-05 7:18 ` Cyrill Gorcunov
2016-03-05 15:57 ` Cyrill Gorcunov
2016-03-05 16:33 ` David Miller
2016-03-05 17:00 ` Cyrill Gorcunov
2016-03-05 18:44 ` Cyrill Gorcunov
2016-03-06 10:09 ` Cyrill Gorcunov
2016-03-06 16:23 ` Eric Dumazet
2016-03-06 17:06 ` Cyrill Gorcunov
2016-03-09 16:39 ` Cyrill Gorcunov
2016-03-09 16:51 ` Cyrill Gorcunov
2016-03-09 16:58 ` Alexei Starovoitov
2016-03-09 17:09 ` Cyrill Gorcunov
2016-03-09 17:24 ` David Miller
2016-03-09 17:53 ` Cyrill Gorcunov
2016-03-09 19:55 ` Cyrill Gorcunov
2016-03-09 20:27 ` David Miller
2016-03-09 20:41 ` Cyrill Gorcunov
2016-03-09 20:47 ` David Miller
2016-03-09 20:57 ` Cyrill Gorcunov
2016-03-09 21:10 ` David Miller
2016-03-09 21:16 ` Cyrill Gorcunov
2016-03-10 10:20 ` Cyrill Gorcunov
2016-03-10 11:03 ` Cyrill Gorcunov
2016-03-10 15:09 ` Cyrill Gorcunov
2016-03-10 18:01 ` David Miller
2016-03-10 18:48 ` Cyrill Gorcunov [this message]
2016-03-10 19:02 ` Cong Wang
2016-03-10 19:55 ` David Miller
2016-03-10 20:01 ` Cyrill Gorcunov
2016-03-10 20:03 ` David Miller
2016-03-10 20:13 ` Cyrill Gorcunov
2016-03-10 20:19 ` Cyrill Gorcunov
2016-03-10 21:05 ` David Miller
2016-03-10 21:19 ` Cyrill Gorcunov
2016-03-10 21:59 ` Cyrill Gorcunov
2016-03-10 22:36 ` David Miller
2016-03-10 22:40 ` Cyrill Gorcunov
2016-03-11 20:40 ` David Miller
2016-03-11 20:58 ` Florian Westphal
2016-03-11 21:00 ` Cyrill Gorcunov
2016-03-11 21:22 ` Cyrill Gorcunov
2016-03-11 21:59 ` Cyrill Gorcunov
2016-03-14 3:29 ` David Miller
2016-03-10 21:09 ` Cong Wang
2016-03-09 17:19 ` David Miller
2016-03-05 6:58 ` Cyrill Gorcunov
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