From: Andi Kleen <andi@firstfloor.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>,
"Templin, Fred L" <Fred.L.Templin@boeing.com>,
Rick Jones <rick.jones2@hp.com>,
"Edgar E. Iglesias" <edgar.iglesias@gmail.com>,
Glen Turner <gdt@gdt.id.au>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: Re: UDP path MTU discovery
Date: Tue, 30 Mar 2010 08:16:27 +0200 [thread overview]
Message-ID: <20100330061627.GM20695@one.firstfloor.org> (raw)
In-Reply-To: <1269929168.1958.94.camel@edumazet-laptop>
> > Right now there is no right socket option to set the path mtu. We
> > have a IP_MTU option, but it only works for getting the MTU.
> > That's because the PMTU is in the routing cache entry and shared
> > by multiple sockets. Presumably one could add a special case
> > with an MTU in the socket overriding the one in the destination entry.
>
> We have IP_MTU_DISCOVER option with four existing values
I think you would just need a sk->pmtu and a option to set/unset it
Or perhaps just a flag that clamps to 1280?
Then the existing mtu discover options would be sufficient.
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2010-03-30 6:16 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-26 0:02 UDP path MTU discovery Glen Turner
2010-03-26 0:53 ` Rick Jones
2010-03-26 3:26 ` David Miller
2010-03-26 17:48 ` Rick Jones
2010-03-31 23:42 ` Glen Turner
2010-03-31 23:51 ` Hagen Paul Pfeifer
2010-04-01 0:06 ` Rick Jones
2010-03-26 3:24 ` David Miller
2010-03-28 8:41 ` Andi Kleen
2010-03-31 23:57 ` Glen Turner
2010-04-01 0:57 ` Andi Kleen
2010-03-28 8:50 ` Andi Kleen
2010-03-29 17:01 ` Rick Jones
2010-03-29 20:14 ` Andi Kleen
2010-03-29 20:25 ` Rick Jones
2010-03-29 20:50 ` Edgar E. Iglesias
2010-03-29 21:01 ` Rick Jones
2010-03-29 21:29 ` Eric Dumazet
2010-03-29 23:38 ` Templin, Fred L
2010-03-30 5:20 ` Andi Kleen
2010-03-30 6:06 ` Eric Dumazet
2010-03-30 6:16 ` Andi Kleen [this message]
2010-03-30 6:17 ` UDP path MTU discovery II Andi Kleen
2010-03-30 6:16 ` UDP path MTU discovery Edgar E. Iglesias
2010-03-30 6:19 ` Andi Kleen
2010-03-30 8:20 ` Edgar E. Iglesias
2010-03-30 14:12 ` Andi Kleen
2010-03-30 22:04 ` Edgar E. Iglesias
2010-03-30 15:58 ` Templin, Fred L
2010-03-30 16:06 ` Andi Kleen
2010-03-31 23:43 ` Glen Turner
2010-04-01 0:55 ` Andi Kleen
2010-04-02 5:41 ` Glen Turner
2010-04-04 10:25 ` Andi Kleen
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