Re: dovetail kernel maintenance

[Philippe Gerum <rpm@xenomai.org>]

Jan Kiszka <jan.kiszka@siemens.com> writes:

> On 06.03.24 09:41, Philippe Gerum wrote:
>> 
>> Jan Kiszka <jan.kiszka@siemens.com> writes:
>> 
>>> On 21.02.24 19:30, Jan Kiszka wrote:
>>>> Hi Philippe,
>>>>
>>>> people started to ask about updates for our kernel trees, and you
>>>> mentioned to me before that you would focus on the last two LTS kernels.
>>>> Right now, there are to-be-tagged updated sleeping in 6.1 and 6.6 but
>>>> then also in 5.10 (all referring to the -rebase branches). Before taking
>>>> over 5.10 and 5.15, I would like to clarify their state. But I would
>>>> also like to know what is delaying the tagging of 6.1 and 6.6.
>>>>
>>>
>>> Gentle ping for this question.
>>>
>> 
>> Well, my posts to the mailing list from my usual address have been
>> rejected a couple of weeks ago due to smtp authentication issues it
>> seems, which are now (mostly) sorted out, I thought you did receive this
>> reply as a direct recipient though. Looks like you did not. So here it
>> is.
>> 
>> PS: Since this reply was written, the x86 status with respect to the
>> Dovetail port to v6.8-rc7 has improved. Still in the process of
>> rewriting the arm64/fpsimd stuff.
>> 
>
> Let us know where exactly help could be provided. I just want to avoid
> duplicate attempts, so the development should be coordinated publicly.
>

Addressing [1] comes to mind. As I said in this thread, one could use
the same logic which allows x86 to support preemption of the helpers for
in-kernel fpu by the real-time core.  However, I have to upgrade the
basic arm64/fpsimd port to v6.8 before someone else can handle this
task. ETA, hopefully next week.

>>> From: Philippe Gerum <rpm@xenomai.org>
>>> Subject: Re: dovetail kernel maintenance
>>> To: Jan Kiszka <jan.kiszka@siemens.com>
>>> Cc: Xenomai <xenomai@lists.linux.dev>
>>> Date: Wed, 21 Feb 2024 21:00:17 +0100
>>>
>>>
>>> Jan Kiszka <jan.kiszka@siemens.com> writes:
>>>
>>>> Hi Philippe,
>>>>
>>>> people started to ask about updates for our kernel trees, and you
>>>> mentioned to me before that you would focus on the last two LTS kernels.
>>>> Right now, there are to-be-tagged updated sleeping in 6.1 and 6.6 but
>>>> then also in 5.10 (all referring to the -rebase branches). Before taking
>>>> over 5.10 and 5.15, I would like to clarify their state.
>>>
>>> Dovetail ports to 5.10 and 5.15 are not maintained anymore, although I'm
>>> still upgrading 5.10 from time to time for work-related reasons, but
>>> nobody should expect this to last for long.
>>>
>
> I can take over those two, but we should coordinate that to avoid
> parallel updates, at least of 5.10. As 5.15 is dropped already, I would
> grab it now officially. Still need to decide whether I continue the
> rebase branches, though.

I don't plan to merge the generic support for oob networking (in
net/core/) which underlies the UDP implementation for xenomai4. So I'm
fine with handing over the maintenance of v5.10 asap.

[1] https://lore.kernel.org/xenomai/ff580dec-096d-45cb-b906-527446c4fa87@163.com/T/#t

-- 
Philippe.