Re: [PATCH net-next v7] ptp: Add support for the AMZNC10C 'vmclock' device

2024-10-28 Thread David Woodhouse
On 28 October 2024 17:12:56 CET, Jakub Kicinski wrote: >On Sat, 19 Oct 2024 18:49:24 +0100 David Woodhouse wrote: >> > Yes please and thank you! We gotta straighten it out before >> > the merge window. >> >> Hm, as I (finally) come to do that, I realise that many of the others >> defined in dr

Re: [PATCH net-next v7] ptp: Add support for the AMZNC10C 'vmclock' device

2024-10-28 Thread Jakub Kicinski
On Sat, 19 Oct 2024 18:49:24 +0100 David Woodhouse wrote: > > Yes please and thank you! We gotta straighten it out before > > the merge window. > > Hm, as I (finally) come to do that, I realise that many of the others > defined in drivers/ptp/Kconfig are also 'default y'. Which is only > really

Re: [PATCH net-next v7] ptp: Add support for the AMZNC10C 'vmclock' device

2024-10-19 Thread David Woodhouse
On Mon, 2024-10-14 at 13:12 -0700, Jakub Kicinski wrote: > On Mon, 14 Oct 2024 08:25:35 +0100 David Woodhouse wrote: > > On Wed, 2024-10-09 at 17:32 -0700, Jakub Kicinski wrote: > > > On Sun, 06 Oct 2024 08:17:58 +0100 David Woodhouse wrote:  > > > > +config PTP_1588_CLOCK_VMCLOCK > > > > +   

Re: [PATCH net-next v7] ptp: Add support for the AMZNC10C 'vmclock' device

2024-10-14 Thread Jakub Kicinski
On Mon, 14 Oct 2024 08:25:35 +0100 David Woodhouse wrote: > On Wed, 2024-10-09 at 17:32 -0700, Jakub Kicinski wrote: > > On Sun, 06 Oct 2024 08:17:58 +0100 David Woodhouse wrote: > > > +config PTP_1588_CLOCK_VMCLOCK > > > +   tristate "Virtual machine PTP clock" > > > +   depends on X86_T

Re: [PATCH net-next v7] ptp: Add support for the AMZNC10C 'vmclock' device

2024-10-14 Thread David Woodhouse
On Wed, 2024-10-09 at 17:32 -0700, Jakub Kicinski wrote: > On Sun, 06 Oct 2024 08:17:58 +0100 David Woodhouse wrote: > > +config PTP_1588_CLOCK_VMCLOCK > > +   tristate "Virtual machine PTP clock" > > +   depends on X86_TSC || ARM_ARCH_TIMER > > +   depends on PTP_1588_CLOCK && ACPI &&

Re: [PATCH net-next v7] ptp: Add support for the AMZNC10C 'vmclock' device

2024-10-09 Thread Jakub Kicinski
On Sun, 06 Oct 2024 08:17:58 +0100 David Woodhouse wrote: > +config PTP_1588_CLOCK_VMCLOCK > + tristate "Virtual machine PTP clock" > + depends on X86_TSC || ARM_ARCH_TIMER > + depends on PTP_1588_CLOCK && ACPI && ARCH_SUPPORTS_INT128 > + default y Why default to enabled? Linus wil

Re: [PATCH net-next v7] ptp: Add support for the AMZNC10C 'vmclock' device

2024-10-09 Thread patchwork-bot+netdevbpf
Hello: This patch was applied to netdev/net-next.git (main) by David S. Miller : On Sun, 06 Oct 2024 08:17:58 +0100 you wrote: > From: David Woodhouse > > The vmclock device addresses the problem of live migration with > precision clocks. The tolerances of a hardware counter (e.g. TSC) are > ty

Re: [PATCH net-next v7] ptp: Add support for the AMZNC10C 'vmclock' device

2024-10-07 Thread Richard Cochran
On Sun, Oct 06, 2024 at 08:17:58AM +0100, David Woodhouse wrote: > From: David Woodhouse > > The vmclock device addresses the problem of live migration with > precision clocks. The tolerances of a hardware counter (e.g. TSC) are > typically around ±50PPM. A guest will use NTP/PTP/PPS to disciplin

[PATCH net-next v7] ptp: Add support for the AMZNC10C 'vmclock' device

2024-10-06 Thread David Woodhouse
From: David Woodhouse The vmclock device addresses the problem of live migration with precision clocks. The tolerances of a hardware counter (e.g. TSC) are typically around ±50PPM. A guest will use NTP/PTP/PPS to discipline that counter against an external source of 'real' time, and track the pre