From: Marek Lindner <lindner_marek@yahoo.de>
To: b.a.t.m.a.n@lists.open-mesh.org
Subject: Re: [B.A.T.M.A.N.] [PATCH 2/2] batman-adv: layer2 unicast packet fragmentation
Date: Tue, 6 Jul 2010 21:50:28 +0200 [thread overview]
Message-ID: <201007062150.29068.lindner_marek@yahoo.de> (raw)
In-Reply-To: <201007062113.12980.sven.eckelmann@gmx.de>
On Tuesday, July 06, 2010 21:13:11 Sven Eckelmann wrote:
> He didn't say that it will take all available system memory. There is still
> the problem that the 6 slots per originator (so the memory per originator)
> could be full when we have a bad link and a too big waiting time for
> missing fragments.
I also think the timeout could be a bit smaller but just to make sure we all
agree on one thing: The fragmentation should never be used over lossy links.
Imagine we have a link with 50% packet loss and fragmentation enabled which
makes out of every packet 2 packets. Now, we have a pretty high probability
that one of these 2 packets gets lost during transit. Therefore batman-adv can
not reassemble the packet on the other side which will lead to a
retransmission that has the same chance of success as the previous packet ...
Regards,
Marek
next prev parent reply other threads:[~2010-07-06 19:50 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-06 15:58 [B.A.T.M.A.N.] batman adv unicast fragmentation (version 4) Andreas Langer
2010-07-06 15:59 ` [B.A.T.M.A.N.] [PATCH 1/2] batctl: layer2 unicast packet fragmentation Andreas Langer
2010-07-06 15:59 ` [B.A.T.M.A.N.] [PATCH 2/2] batman-adv: " Andreas Langer
2010-07-06 17:07 ` Andrew Lunn
2010-07-06 18:06 ` Andreas Langer
2010-07-06 17:39 ` Antonio Quartulli
2010-07-06 18:17 ` Andreas Langer
2010-07-06 18:57 ` Andrew Lunn
2010-07-06 19:13 ` Sven Eckelmann
2010-07-06 19:50 ` Marek Lindner [this message]
2010-07-07 10:40 ` Marek Lindner
-- strict thread matches above, loose matches on Subject: below --
2010-07-07 17:30 [B.A.T.M.A.N.] batman adv unicast fragmentation (version 5) Andreas Langer
2010-07-07 17:32 ` [B.A.T.M.A.N.] [PATCH 2/2] batman-adv: layer2 unicast packet fragmentation Andreas Langer
2010-07-09 14:51 ` Sven Eckelmann
2010-07-05 21:42 [B.A.T.M.A.N.] batman adv unicast fragmentation (version 3) Andreas Langer
2010-07-05 21:44 ` [B.A.T.M.A.N.] [PATCH 2/2] batman-adv: layer2 unicast packet fragmentation Andreas Langer
2010-06-30 18:58 [B.A.T.M.A.N.] batman adv unicast fragmentation Andreas Langer
2010-06-30 19:00 ` [B.A.T.M.A.N.] [PATCH 2/2] batman-adv: layer2 unicast packet fragmentation Andreas Langer
2010-07-05 0:37 ` Sven Eckelmann
2010-07-05 12:53 ` Sven Eckelmann
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