From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Furniss Date: Wed, 01 Mar 2006 14:53:27 +0000 Subject: Re: [LARTC] QoS in Linux Message-Id: <4405B567.8000800@dsl.pipex.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Krishan wrote: > Hello All, I am interested in QoS provided by Linux, when I looked into IP > header I came accross ToS field, also while going more into detail about > QoS I found that the QoS based on ToS is serviced thru DiffServ which in > turn gives more priority to packets with higher value is ToS field, but I > am not able to understand when we finally call dev->hard_start_xmit > routine of underlying device type driver, how these packets are given high > priority or low priority in the device queue. I don't think they normally are - unless it's drivers support it. If you want to shape you normally need to use htb/cbq/hfsc/tbf to rate limit below the speed of the device and avoid overfilling it's buffer. Andy. _______________________________________________ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc