On 2026-05-18 18:26:46-07:00, Jakub Kicinski wrote: > On Fri, 15 May 2026 16:40:20 +0000 Arthur Kiyanovski wrote: > > > This series adds quality attributes to PTP Hardware Clock (PHC) > > timestamps, allowing userspace to obtain error bound, clock status, > > timescale, and raw counter values alongside timestamps in a single > > call. > > How does this proposal relate to: > > https://lore.kernel.org/all/[email protected]/ > > ? The two series are independent and complementary. This patchset adds a generic PTP subsystem interface for reporting quality attributes (error bounds, clock status) alongside PHC timestamps — it's a userspace-facing API extension. The RFC is about kernel-internal feed-forward clock discipline, letting the timekeeping subsystem lock directly to a vmclock reference.
Both touch ptp_vmclock.c but in different code paths: this series adds a gettimexattrs64 callback for PTP chardev ioctls, the RFC adds timekeeping_set_reference() for kernel-internal clock steering. No functional dependency or overlap.
