netdev - Re: tbf/htb qdisc limitations

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20101014085005.GA8349@ff.dom.local>
Date:	Thu, 14 Oct 2010 08:50:05 +0000
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Bill Fink <billfink@...dspring.com>
Cc:	Rick Jones <rick.jones2@...com>,
	Steven Brudenell <steven.brudenell@...il.com>,
	netdev@...r.kernel.org
Subject: Re: tbf/htb qdisc limitations

On Thu, Oct 14, 2010 at 08:09:39AM +0000, Jarek Poplawski wrote:
> On Thu, Oct 14, 2010 at 03:13:54AM -0400, Bill Fink wrote:
> > TSO/GSO was disabled and was using 9000-byte jumbo frames
> > (and specified mtu 9000 to tc command).
> > 
> > Here was one attempt I made using tbf:
> > 
> > tc qdisc add dev eth2 root handle 1: prio
> > tc qdisc add dev eth2 parent 1:1 handle 10: tbf rate 8900mbit buffer 1112500 limit 10000 mtu 9000
> > tc filter add dev eth2 protocol ip parent 1: prio 1 u32 match ip dst 192.168.1.23 flowid 10:1
> > 
> > I tried many variations of the above, all without success.
> 
> The main problem are smaller packets. If you had (almost) only 9000b
> frames this probably could work. [...]

On the other hand, e.g. the limit above seems too low wrt mtu & rate.

Jarek P.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html