Hi, it seem that since this commit https://github.com/ceph/ceph/pull/4261/files lltng is enabled by default. But this give error with qemu when apparmor|selinux is enabled. That's why ubuntu && redhat now disable it for their own packages. https://bugzilla.redhat.com/show_bug.cgi?id=1223319 https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1432644 In the ubuntu launchpad, Sage has made a reply " Sage Weil (sage-newdream) wrote on 2015-04-02: #21 FWIW, we are disabling the lttng support in the final hammer release to avoid this issue (until we come up with a better solution)." It seem that it's still enabled by default in ceph git and ceph.com packages. Is it still planned to disable by default ? -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html