From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hans de Bruin <jmdebruin@xmsnet.nl>
Subject: Re: Limits on mtu size ?
Date: Sat, 08 Oct 2011 08:39:33 +0200
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To: James Harper <james.harper@bendigoit.com.au>
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On 10/08/2011 12:29 AM, James Harper wrote:
 >>
 >> Network performance on fast physical networks usually increase by
 >> switching to larger packet sizes. So I decided to increase the mtu on
...
 > Dom0 feels sluggish.

This was a wrong  dns setting.

  So 16436 is to big and 9000
 > is not?
 >>
 >> I have attached the complaints of darkstar. Its running out of kernel
 >> memory?
 >>
 >
 > If all the hosts are Linux and GSO is enabled, the machines should be
 > exchanging 64K packets anyway, regardless of MTU.
 >

I should have read this http://lwn.net/Articles/188489/

-- 
Hans