Hi, Tonight I upgraded to 2.6.10-rc3. Everything was fine until I started wondershaper to setup my Qos rules : wondershaper eth0 255 16 And the machine freezed hard. No magic sysrq working, no oops in my logs. The computer is an x86 smp (dual p3) wondershaper was working fine with 2.6.9. .config attached. kernel is compiled with debian gcc-3.4.3-3