[CXP] some questions about "Common Xenomai Platform"

Greg Gallagher greg at embeddedgreg.com
Thu Jan 7 16:59:22 CET 2021

On Thu, Jan 7, 2021 at 10:53 AM hailong via Xenomai <xenomai at xenomai.org>

> At 2021-01-04 01:38:04, "Philippe Gerum" <rpm at xenomai.org> wrote:
> >
> >Hailongliu via Xenomai <xenomai at xenomai.org> writes:
> >
> >> Hi,
> >>
> >> I learned the "Common Xenomai Platform" program from this mail-list and
> wiki
> >> of project Xenomai. This is a very attractive plan, as it will port
> Xenomai for
> >> recent LTS kernel(v5.10).
> >>
> >> I noticed that  March 31, 2021 is the deadline for "CXP", dose that
> mean we
> >> can expect the new features at Xenomai-3.3 ?
> >
> >Yes, that is the plan. Xenomai 3.3 is going to be the first release
> >fully implementing the CXP. Xenomai 4 which is going to use a different
> >real-time core will be developed in parallel to Xenomai 3.3, aiming at
> >CXP-compliance too. It should be clear that March 31, 2021 is the date
> >for completing the CXP specification, not that of any release
> >implementing it, which can only happen later by definition.
> >
> Will the CXP or Xenomai 4 compatible with RT-patch over time?
> In addition,   I learned that the legacy RTOS emulators (such as VxWorks)
> will be excluded from Xenomai 3.x , neither Xenomai 4?
That is correct, we don't have the resources to continue to support the
RTOS emulators.  I believe it was left open that if someone
wants to take this on as a maintainer they could be included.

> >> I also concern about that how long Xenomai-3.3 will be live? And if
> there
> >> will be a long term version with kernel-v5.10 for Xenomai?
> >>
> >
> >Xenomai will run v5.10 LTS as soon as release 3.2, based on the ongoing
> >port of the Cobalt core to Dovetail.
> >
> >How long a particular Xenomai release is maintained for a particular
> >kernel version currently depends on a few individuals and companies
> >having a specific requirement to keep such port alive, and contributing
> >to this task directly (doing the work) or indirectly (funding someone
> >else's work).
> >
> >Although there is a commitment to run Xenomai 3.x on top of kernel v5.10
> >asap, I'm not aware of any formal commitment of any current contributor
> >to maintain this port for a pre-defined period of time. One may only
> >assume that by picking a LTS kernel like v5.10, we are likely going to
> >maintain it "for some time".
> >
> Thanks.



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