Public bug reported:
I've been using a QOS script for years to keep voip and general internet
usage usable with torrents running on the same connection. Until
recently this script has worked very well. Now torrents are seeding very
slowly, but return to maximum speed immediately when the QOS script is
unloaded.
Reproducing this problem is very simple:
1. Seed some active torrents without limiting your upload rate.
2. Code:
tc qdisc add dev eth1 root handle 1: tbf rate 675kbit latency 50ms burst
1540
where eth1 is the connected to the internet with a routable IP address
on a connection that is limited to greater than 675 kbps by the ISP.
3. Watch your torrent upload speed drop to 10 KiB/s or less within seconds.
4. Code:
sudo tc qdisc del dev eth1 root 2> /dev/null > /dev/null
5. Watch your upload speed return to normal within seconds.
Other info
# lsb_release -rd
Description: Ubuntu 8.10
Release: 8.10
# apt-cache policy iproute
iproute:
Installed: 20080417-1
Candidate: 20080417-1
Version table:
*** 20080417-1 0
500 http://ubuntu.mirror.rafal.ca intrepid/main Packages
100 /var/lib/dpkg/status
# uname -a
Linux zacharias 2.6.27-11-server #1 SMP Thu Jan 29 20:13:12 UTC 2009 x86_64
GNU/Linux
db
** Affects: iproute (Ubuntu)
Importance: Undecided
Status: New
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tbf kills torrents
https://bugs.launchpad.net/bugs/351408
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