On Sun, Feb 26, 2017 at 09:52:18PM +0100, Lennart Poettering wrote: > On Thu, 23.02.17 22:20, Marcelo Tosatti (mtosa...@redhat.com) wrote: > > > > > Its necessary to specify the KVM PTP device name in userspace. > > > > In case a network card with PTP device is assigned to the guest, > > it might be the case that KVM PTP gets /dev/ptp0 instead of /dev/ptp1. > > > > Fix a device name for the KVM PTP device. > > What's the symlink precisely good for, can you elaborate?
You want to configure Chrony to use PTP in the guest to sync with the host. You need to add a entry to /etc/chrony.conf pointing to "/dev/ptp0", the ptp_kvm device. However, it might be the case that a PCI assigned device has a PTP clock, and it can be registered as "/dev/ptp0" and ptp_kvm as "/dev/ptp1". > Also, what's the benefit of shipping this upstream? Why not ship that > rule with kvm? qemu-kvm package? Sure i can do that, but then all distributions have to do the same with their own packages. Why not do it in a centralized location where everyone benefits? (other virtual devices such as virtio-serial already have aliases upstream). > Lennart > > -- > Lennart Poettering, Red Hat _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
