Re: [Bugme-new] [Bug 7278] New: forcedeth slowed down by traffic shaping

[Andrew Morton <akpm@osdl.org>]

On Fri, 6 Oct 2006 17:18:13 -0700
bugme-daemon@bugzilla.kernel.org wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=7278
> 
>            Summary: forcedeth slowed down by traffic shaping
>     Kernel Version: 2.6.16
>             Status: NEW
>           Severity: normal
>              Owner: jgarzik@pobox.com
>          Submitter: kernel-bugzilla@future.shiny.co.il
> 
> 
> When assigninig a simple Tocket Bucket Filter (TBF) classless trafic shaping
> policy to the eth0 device (provided by forcedeth), the device's upstream speed
> drops to ~12kbyte/s, regardless of the traffic limit I set in the shaping rule.
> In fact, the traffic limit values could be larger than the connection's
> throughput and it'll still limit to mere 12kbyte/s. Once I revert the rule to
> pfifo_fast, the rate resumes to the connection's real one (64kbyte/s).
> 
> If I set the TBF lower than 96kbit on eth0, it indeed applies; in other words, I
> can make the connection slower than 12kbyte/s but not faster.
> 
> If I assign the same rule to ppp0, it works just as intended, for rules higher
> than 12kbyte/s, leading me to believe forcedeth has something to do with it.
> 
> (Is there any module parameter I can try tweaking?)
>