On 05/10/2018 09:00 AM, stan wrote: > On Thu, 10 May 2018 07:57:29 -0700 > Paolo Galtieri <pgaltieri@xxxxxxxxx> wrote: > >> Folks, >> twice now in the last 2 days when I have sat in front of my PC I >> have found the following message on the screen: >> >> Kernel not configured for semaphores (System V IPC). Not using udev >> synchronization code. >> Halting. >> >> Since I have not modified my kernel from what I downloaded when I did >> the most recent update I don't understand why this message is >> appearing. Both times it occurred during the night because I find it >> first thing in the morning. >> >> Anyone have any idea what is causing this message to appear? > > This is probably something else other than the kernel that has a bug. > You can check if your kernel has semaphores set by going into /boot and > running > grep -i -e 'IPC' [config file for your running kernel] Easier command: grep -i -e 'IPC' /boot/config-`uname -r` > It should show something like > CONFIG_SYSVIPC=y > CONFIG_SYSVIPC_SYSCTL=y > CONFIG_IPC_NS=y > My suspicion would fall on systemd as a cause for your problem. But > that's just a guess based on the error message, I haven't actually > checked for the error message in the source. On my F28 VM (updating as I write this, but...): [root@fedora28-vm sysvipc]# uname -r 4.16.5-300.fc28.x86_64 [root@fedora28-vm sysvipc]# grep -i -e 'IPC' /boot/config-`uname -r` CONFIG_SYSVIPC=y CONFIG_SYSVIPC_SYSCTL=y And: [root@fedora28-vm sysvipc]# ls -l /proc/sysvipc total 0 -r--r--r--. 1 root root 0 May 10 10:12 msg -r--r--r--. 1 root root 0 May 10 10:12 sem -r--r--r--. 1 root root 0 May 10 10:12 shm which indicates that the SYSV IPC stuff IS there. It'd be odd for a kernel to be built without semaphores as they are a heavily-used IPC mechanism. Can you please let us know what version of the kernel you're using? "uname -r" will give it to you (as I showed above). ---------------------------------------------------------------------- - Rick Stevens, Systems Engineer, AllDigital ricks@xxxxxxxxxxxxxx - - AIM/Skype: therps2 ICQ: 22643734 Yahoo: origrps2 - - - - If you are what you eat, then I'm fast, cheap and greasy! - ---------------------------------------------------------------------- _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx
