netdev - Re: [PATCH 1/2]: [NET_SCHED]: Make all rate based scheduler work with TSO.

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Message-ID: <46DD867E.6020307@trash.net>
Date:	Tue, 04 Sep 2007 18:23:26 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Bill Fink <billfink@...dspring.com>
CC:	Jesper Dangaard Brouer <hawk@...u.dk>, jdb@...x.dk,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 1/2]: [NET_SCHED]: Make all rate based scheduler work
 with TSO.

Bill Fink wrote:
> On Sat, 1 Sep 2007, Jesper Dangaard Brouer wrote:
>
>>On Sat, 1 Sep 2007, Patrick McHardy wrote:
>>
>>>
>>>It still won't work properly with TSO (TBF for example already drops
>>>oversized packets during ->enqueue), but its a good cleanup anyway.
>>
>>Then lets call it a cleanup of the L2T macros.  In the next step we will 
>>fix the different schedulers, to use the ability to lookup larger sized 
>>packets. (I did notice the TBF scheduler would drop oversized packets).
> 
> 
> Hmmm.  I guess this is also why TBF doesn't seem to work with 9000 byte
> jumbo frames.
> 
> [root@...g4 ~]# tc qdisc add dev eth2 root tbf rate 2gbit buffer 5000000 limit 18000


Yes, you need to specify the MTU on the command line for
jumbo frames.
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