[Bugme-new] [Bug 11249] New: TC HTB hanging problem

[bugme-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=11249

           Summary: TC HTB hanging problem
           Product: Networking
           Version: 2.5
     KernelVersion: 2.6.23 and 2.6.25
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Other
        AssignedTo: acme at ghostprotocols.net
        ReportedBy: lansoweb at hotmail.com


Latest working kernel version:
Earliest failing kernel version: 2.6.23

Distribution: Mandriva 2007.1 and 2008.0

Hardware Environment:
It happens in many different servers

Software Environment:
Problem Description:
I have close to 200 servers, most with mandriva 2006.0 using kernel 2.6.15,
some with mandriva 2008.0 using kernel 2.6.23 or 2.6.25. In some of them
(kernels 2.6.23 and 2.6.25 confirmed) the server hangs at random (some servers
hang more than once a day, some once a month).
The hardware is different from each other and i have about 5 servers with
exactly the same configuration (proc, mem, ethernet, so one) and one hangs
every day while the others are running fine, all with the same rules for
traffic shapping (tc using htb).
I think that it is something related to tc because last week i accessed a
server and when i type tc del to remove the shapping it hanged. My client
restarted the server and about 10 minutes later i did it again with the same
effect. No kernel panic, no oops, just hangs. 
I've read some posts and bugs but i see something related to ethernet driver
(like sk98lin), but it is happening with several servers with different
hardwares.
I have some servers with kernel 2.6.15 and, as far as i know, it doesn't happen
with them, but some of they use a different set of tc rules (a few less rules
actually) or none at all.
I don't use the kernel shippied with mandriva distro, always got kernel from
kernel.org and compilled myself.

Steps to reproduce:
Handly, since it is random, it takes minutes or weeks to happen, but always
with some change in tc (start or stop).


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