On 02.03.20 17:24, Greg Gallagher wrote:
On Mon, Mar 2, 2020 at 11:12 AM Lange Norbert via Xenomai
<xenomai@xenomai.org> wrote:
-----Original Message-----
From: Jan Kiszka <jan.kis...@siemens.com>
Sent: Montag, 2. März 2020 16:59
To: Lange Norbert <norbert.la...@andritz.com>
Subject: Re: Ipipe-Patch for kernel version 5.4.23
NON-ANDRITZ SOURCE: BE CAUTIOUS WITH CONTENT, LINKS OR
ATTACHMENTS.
Offlist by intention?
Nope, just Outlook hating me.
Norbert
Jan
On 02.03.20 16:26, Lange Norbert wrote:
-----Original Message-----
From: Xenomai <xenomai-boun...@xenomai.org> On Behalf Of Jan
Kiszka
via Xenomai
Sent: Montag, 2. März 2020 13:38
To: Ralf Moder <ralf.mo...@hbkworld.com>; xenomai@xenomai.org
Subject: Re: Ipipe-Patch for kernel version 5.4.23
NON-ANDRITZ SOURCE: BE CAUTIOUS WITH CONTENT, LINKS OR
ATTACHMENTS.
On 02.03.20 11:00, Ralf Moder via Xenomai wrote:
Hello everyone,
I need the kernel version 5.4.23 in an embedded linux project because
of
driver stuff but also the Xenomai extension. How big is the probability
that an
I-pipe patch for the 5.4 version will be released in the next 2 to 3 months?
I would first of all say that it's >0. But beyond that, it depends on the
architecture: x86 should be available on 5.4 in the next months with a
probability >>50% as that will be my primary target for looking into how to
move forward. ARM and ARM64 currently lacks a maintainer. If we are
lucky,
the base enabling via Philippe's dovetail queue will enable those more or
less
as well. But it will definitely take someone to take responsibility for those
archs because my colleagues and I currently cannot invest beyond
integrating
contributions. There is also ppc32 (which has a maintainer), but I suppose
that this is not your target.
Jan
I still can't estimate the impact of swapping to dovetail, how much "ripples"
this will cause.
I suppose the cobalt usermode interface will stay the same.
- Will drivers (rtnet) be affected?
I don't think there will be a big impact, but that may depend on how
the RTDM core is ported over.
This is also my current expectation. Devil may sit in the details, though.
- AFAIU there finally will be shared clocks (monotonic, realtime) between
cobalt and linux?
Worth to look into, but first prio would be getting things working,
maybe initially with a bunch of additional patches on top of dovetail to
keep Xenomai happy. In contrast to EVL, we will have to make sure that
Xenomai remains usable with older kernels and their I-pipe patches.
Jan
I would of course welcome a 5.4 kernel, allowing me to drop several
backported patches,
at the same time it's not a really good time to swap the basic building blocks
for us.
x86 5.4 kernel?
Norbert
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