Re: [libvirt] running Libvirt from source code, IPC_LOCK and VFIO

Hi Erik, Just to let you know that the error I reported in one of my replies was being caused by one change I forgot to undo. This error here: error : virQEMUCapsNewForBinaryInternal:4687 : internal error: Failed to probe QEMU binary with QMP: libvirt:  error : prctl failed to enable 'dac_override' in the AMBIENT set: Operation not permitted was happening because I have commented out this line inside qemu_capabilities.c: --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -4519,7 +4519,7 @@ virQEMUCapsInitQMPCommandRun(virQEMUCapsInitQMPCommandPtr cmd,                                      "-daemonize",                                      NULL);      virCommandAddEnvPassCommon(cmd->cmd); -    virCommandClearCaps(cmd->cmd); +   // virCommandClearCaps(cmd->cmd);  #if WITH_CAPNG      /* QEMU might run into permission issues, e.g. /dev/sev (0600), override Thus there is no need to move the PR_CAP_AMBIENT around to prevent the error message. Sorry for any alarms I might have raised there. I'm still experiencing the issue with IPC_LOCK inside the guest though. I'll update here when I have concrete findings about it.