Re: PROBLEM: IProute hangs after running traffic shaping scripts

[Szymon Miotk <spam@xxxxxxxxxxxxx>]

Patrick McHardy wrote:
> Thomas Graf wrote:
>
> > * Patrick McHardy <418F9AD0.1040701@xxxxxxxxx> 2004-11-08 17:12
> >  
> >
> > > There is some optimization possible, I will do this for the final
> > > patch. But I don't understand the problem you refer to, can you
> > > please explain ?
> > I don't have the time to verify this at the moment but:
> >
> > 1) qdisc_destroy unlinking all the lists
> > 2) RTM_NEWQDISC creating a new qdisc with the same major classid as 
> > the old one
> >   which will suceed since the old one cannot be found anymore.
> > 3) rcu callback __qdisc_destroy -> qdisc_destroy looking through 
> > qdisc_list
> >   again and then deleting the new entries because their major classid 
> > matches.
> > I might be missing something though.
> You're right, thanks. The optimization already fixed this, but I
> wasn't aware of the bug :) New patch attached.
I've tested the new kernel (2.6.10-rc1_bk17) with this patch.
It performed well on test system (reloading my traffic shaping 
configuration for 100 times).
Now it forks for some 22 hours on production system, under normal load 
(~20 Mbit, 500 clients at a time, 15000 entires in route table) and it 
performs well.
Thanks a lot for your help, it really saved me away from troubles.

Szymon Miotk