Migrations fail with HTB: quantum of class 10001 is big. Consider r2q change

adoII

Renowned Member
Jan 28, 2010
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Hi there,

i am running proxmox 4.0 in a cluster with kernel 4.2.2-1-pve

My virtual machines use traffic shapping like: net0: virtio=96:89:34:1C:AC:C6,bridge=vmbr0,rate=12
The network is quite fast/10 Gigabit

I see strange effects that live migrations sometimes fail, sometimes they work
Sometimes the same migration which just failed suceeds 20 Minutes later.

On the Proxmox machines in the dmesg output i see messages like this:

Code:
[ 2641.493905] vmbr0: port 9(tap198i0) entered forwarding state
[ 2641.523523] HTB: quantum of class 10001 is big. Consider r2q change.
[ 2642.952392] vmbr0: port 9(tap198i0) entered disabled state

Do you have any idea what is happening and what I can do to work around the problem ?

Thanks
adoII