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Re: realtime kernel on ARM hardware



Quoting Gene Heskett (2019-12-30 18:37:34)
> On Monday 30 December 2019 11:05:15 Jonas Smedegaard wrote:
> 
> > Quoting Gene Heskett (2019-12-30 16:48:20)
> >
> > > On Monday 30 December 2019 10:01:59 Jonas Smedegaard wrote:
> > > > Quoting Gene Heskett (2019-12-30 15:39:20)
> > > >
> > > > > This one has to do with building a pre-empt-rt kernel for 
> > > > > armhf, which allows linuxcnc to run in uspace. But subjectwise 
> > > > > it wanders badly but I'd like to show one full chain of recent 
> > > > > events:
> > > >
> > > > [ Raspbian details snipped ]
> > > >
> > > > How do Debian with linux-image-rt-* perform on that hardware?
> > > >
> > > > https://packages.debian.org/search?keywords=linux-image-rt
> > >
> > > I can't directly answer that, Jonas, as I shifted my attention to 
> > > raspbian when I tried a netinstall of the buster original image 
> > > and found it was arm64.
> >
> > I fully understand how running 32bit has its use even for hardware 
> > supporting 64bit.  But if I understand you correctly that you tried 
> > only the arm64 image before giving up and moving to a different 
> > distribution, then I don't understand why - Buster support both 
> > armhf and arm64: https://www.debian.org/CD/netinst/

> I must have come to a page similar, but to not recall previously 
> seeing all the choices showing on that page linked above. I saw one 
> choice only for the netinstall at the time I downloaded the iso. ISTR 
> it was about a week after buster was announced.
> 
> Would it have made a difference when asking about a realtime kernel 
> for it?

I don't understand your question - yes, I guess that if you had seen 
(not some other misleading page but) the official Debian page listing 
both armhf and arm64 options then you would have tried the armhf option 
before looking outside of Debian, which I guess would have affected how 
you would then have phrased questions here related to your (then 
different) journey.

...but I suspect I misunderstood and your question above is another.


 - Jonas

-- 
 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

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