Hi, I'm running Fedora 20 inside a 3.12 UML kernel and the "yum upgrade -y" command seems to get stuck after a while/few minutes.
Any ideas what's going one here? How to debug this? It looks like the process running yum is in state ptrace stopped, but doesn't continue. The process tree looks also strange: 20330 pts/3 S+ 1:18 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20337 pts/3 S+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20338 pts/3 S+ 0:03 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20339 pts/3 S+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20347 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20405 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20469 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20615 pts/3 S+ 0:00 | \_ xterm -T Virtual Console #1 (fedora20) -e port-helper -uml-socket /tmp/xterm-pipeiW6d5k 20625 ? Ss 0:00 | | \_ port-helper -uml-socket /tmp/xterm-pipeiW6d5k 20626 ? Zs 0:00 | \_ [linux] <defunct> 20630 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20642 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20650 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20651 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20663 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20681 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20684 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20690 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20691 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20699 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20709 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20722 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20754 pts/3 S+ 0:00 | \_ xterm -T Virtual Console #2 (fedora20) -e port-helper -uml-socket /tmp/xterm-pipetxRIbS 20757 ? Ss 0:00 | | \_ port-helper -uml-socket /tmp/xterm-pipetxRIbS 20755 pts/3 S+ 0:00 | \_ xterm -T Virtual Console #6 (fedora20) -e port-helper -uml-socket /tmp/xterm-pipedhXmGp 20762 ? Ss 0:00 | | \_ port-helper -uml-socket /tmp/xterm-pipedhXmGp 20758 ? Zs 0:00 | \_ [linux] <defunct> 20760 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20763 ? Zs 0:00 | \_ [linux] <defunct> 20797 pts/3 S+ 0:00 | \_ xterm -T Virtual Console #3 (fedora20) -e port-helper -uml-socket /tmp/xterm-pipeULItXd 20812 ? Ss 0:00 | | \_ port-helper -uml-socket /tmp/xterm-pipeULItXd 20813 ? Zs 0:00 | \_ [linux] <defunct> 20815 pts/3 S+ 0:00 | \_ xterm -T Virtual Console #5 (fedora20) -e port-helper -uml-socket /tmp/xterm-pipeaKUbD3 20876 ? Ss 0:00 | | \_ port-helper -uml-socket /tmp/xterm-pipeaKUbD3 20877 ? Zs 0:00 | \_ [linux] <defunct> 20896 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 20909 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 21005 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 21007 pts/3 Z+ 0:00 | \_ [uml_net] <defunct> 21019 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 21112 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 21125 pts/3 Z+ 0:00 | \_ [uml_net] <defunct> 22164 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 22211 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 22224 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 22380 pts/3 t+ 0:51 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 21965 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 21968 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 21983 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 22053 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 22058 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 22887 pts/3 t+ 0:00 | \_ ./linux ubd0=ext3fs.img mem=768M systemd.unit=multi-user.target umid=fedora20 with kind regards thomas ------------------------------------------------------------------------------ November Webinars for C, C++, Fortran Developers Accelerate application performance with scalable programming models. 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