hi, following my test on guest and stress-ng i saw this one: https://github.com/ColinIanKing/stress-ng/commit/6bff6455ebcfc619d739bb8488bb8348af8a0416#diff-2eb2ac75658a0187be7dfaa1475be043 after a lot of test and this is an overflow that kills all process but it seems to be in the stress-ng code. Compiling by hand the last version i was not able to reproduce the killing anymore. So i can close the 'bug' as not related to vserver. Ghislain.