Thank you for the detailed discussion. There is no doubt that there is a need for an IMQ type device/funtionality. What would work really great, IMHO, is a "fake" or psuedo ethernet driver that simply sits as a shim between one or more real drivers. This fake device could allow us to "Stack" qdiscs in a way to allow one to shape traffic in multiple "policies" - ie, prioritize traffic AND allocate / rate shape end users. I have actually thought of utilizing the kernel bonding driver for this - attaching only a single slave to it - but haven't had time as yet. Not sure that this would do anything for ingress shaping though. Thanks again... Mike > Probably I am going to continue imq development, so I know about it > something. > > IMQ is very unpredictable you can use it all week or it may crash at once. > and what is the most strange - crashes osccur everywhere in the kernel > except in the driver itself > this can be kernel bug as well. > under high loag it crashes quite soom while in low load it can hold > forewer > this probably depends on cpu speed and looks that it tends to crash if you > try to shape localy generated trafic > if you use it for ingress only it wont have much problems. > > I have no hope to make it work, I rewrote the code completely few times > and > no use > probably this way just cant work. > > I am going to use completely other way to do the same job. > imq is trying to use userspace queue which dont like when packets are > droped > and seems there is no way to avoid droping > while doing trafic shaping, so I will use another way by completely > removing > packets from iptables at some place and transmitting them directly where > needed. > thus replacing part of kernel code. > this way I will be able at least to track the bug. > > P.S. iptables have another similar module ( ROUTE target ) i tryed it and > it > works in some cases ( i redirect trafic to lo interface) but not very > good. > > > ----- Original Message ----- > From: "Michael S. Kazmier" <mkazmier@xxxxxxxxxx> > To: <lartc@xxxxxxxxxxxxxxx> > Sent: Friday, January 23, 2004 7:29 PM > Subject: IMQ Stability > > >> Hello all, >> >> I have been doing a lot of archive searching over the last week reading >> posts on IMQ and it's apparent stability / instability. I have seen a >> number of posts about it not being maintained as well. Can anyone talk >> to >> me about IMQ's stability in a heavy throughput environment (20 Mbps) and >> what was causing IMQ to fail if you know. >> >> Thanks, >> >> Mike >> >> _______________________________________________ >> LARTC mailing list / LARTC@xxxxxxxxxxxxxxx >> http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/ >> > > _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
