From mboxrd@z Thu Jan 1 00:00:00 1970 From: "m.innocenti@cineca.it" Date: Fri, 27 May 2005 06:00:39 +0000 Subject: Re: [LARTC] What is: "Consider r2q change" Message-Id: <4296B787.3080305@cineca.it> List-Id: References: <429650AD.5050506@samera.com.py> In-Reply-To: <429650AD.5050506@samera.com.py> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Oliver Schulze L. ha scritto: > I'm getting this warning/error in /var/log/messages: > May 26 18:21:05 mail kernel: HTB: quantum of class 10010 is small. > Consider r2q change. > Its a big deal? What should I do? If I understand the source, that message occours when you have a leaf class whose calculated quantum (rate/r2q) is less than 1000 byte and the kernel set the quantum to 1000 byte. I've read that the quantum should be bigger than the MTU so I don't understand why the kernel don't use a minimum quantum value bigger than 1500. Someone has a clue? From kernel-source-2.6.10/net/sched/sch_htb.c if (!hopt->quantum && cl->un.leaf.quantum < 1000) { printk(KERN_WARNING "HTB: quantum of class %X is small. Consider r2q change.\n", cl->classid); cl->un.leaf.quantum = 1000; -- ********************************************************************** Marco Innocenti Gruppo Infrastruttura e Sicurezza CINECA phone:+39 0516171553 / fax:+39 0516132198 Via Magnanelli 6/3 e-mail: innocenti@cineca.it 40033 Casalecchio di Reno Bologna (Italia) ********************************************************************** _______________________________________________ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc