On Thu, 22 Mar 2018, Jesus Sanchez-Palencia wrote:
> On 03/21/2018 07:22 AM, Thomas Gleixner wrote:
> > Bah, and probably there you need CLOCK_TAI because that's what PTP is based
> > on, so clock_system needs to accomodate that as well. Dammit, there goes
> > the simple 2 bits implementation. CLOCK_TAI is 11, so we'd need 4 clock
> > bits plus the adapter bit.
> >
> > Though we could spare a bit. The fixed CLOCK_* space goes from 0 to 15. I
> > don't see us adding new fixed clocks, so we really can reserve #15 for
> > selecting the adapter clock if sparing that extra bit is truly required.
>
>
> So what about just using the previous single 'clockid' argument, but then just
> adding to uapi time.h something like:
>
> #define DYNAMIC_CLOCKID 15
>
> And using it for that, instead. This way applications that will use the raw hw
> offload mode must use this value for their per-socket clockid, and the qdisc's
> clockid would be implicitly initialized to the same value.
That's what I suggested above.
Thanks,
tglx
