Who is the author of the actual patch? Are they interested?
Anyone got a spin of Fedora 8 handy?
On Tue, Dec 2, 2008 at 9:14 AM, Fernando Lopez-Lezcano <nando@xxxxxxxxxxxxxxxxxx> wrote:
On Mon, 2008-12-01 at 14:41 -0700, David Nielson wrote:Well, that would be the right approach if the rt patch were to be part
> I think it's time to get Linus' attention. The hard hang bug is a kernel
> regression. MIDI not working with ALSA is a kernel regression. Linus has
> said many times that a regression is a thousand times worse than any
> other bug, so if kernel devs aren't paying attention, I say it's time to
> do an end-run around them and go to a higher authority.
of the standard kernel tree. Regretfully it is not, so I doubt it would
have much effect.
I have not had the time to try to see what is going on with the hard
hangs (set up a serial console and something to receive it, etc, etc,
etc). So I have not posted on lkml about the hangs. I think you need to
have some hard data before doing that, otherwise what is the point?
I guess that would be the most stable thing to run. Depending on how low
> But re: Practicality, is it best for now to use F8 with the 2.6.24 CCRMA
> kernel? I will be building a new system in about a week, and stability
> is the most important thing right now.
latency it is you actually need you could also run the regular Fedora
kernel on f9 or 10.
-- Fernando
> Thanks for all you're doing.
>
> David
>
> Fernando Lopez-Lezcano wrote:
> > On Mon, 2008-12-01 at 12:58 -0500, Hector Centeno wrote:
> >
> >> I wonder what are the latest news about the issues with the RT kernel?
> >> It seems to me that all recent distros are struggling with it and I
> >> remember reading some thread in LKML a few months ago. Will it be
> >> possible to have a RT kernel in Fedora 10 any time soon? (I'm not
> >> pressuring, just wondering about getting some info to plan my
> >> upgrades).
> >>
> >
> > The current status (for Planet CCRMA + Fedora) is as follows:
> >
> > The rt patches available online are:
> >
> > 2.6.24.7-rt21
> > 2.6.26.6-rt11 (last updated October 13th)
> > [http://www.kernel.org/pub/linux/kernel/projects/rt/]
> >
> > That hints as to the status of the rt patch :-(
> > How do they interact with Fedora >= 9?
> >
> > 2.6.24.7-rt21: stable and the one I would use, except for the fact that
> > the new X server in >= fc9 don't like something in the "old" 2.6.24
> > kernel and segfault every once in a while, taking the whole session with
> > it. Not usable unless you downgrade X to the one that comes with Fedora
> > 8 (I tried it and that appears to work but it is not very practical).
> >
> > 2.6.26.6-rt11: that seems to mostly work but I have seen this kernel
> > hang hard. Not very often but it happens. The big problem (other that
> > the hangs) that I have with that one is that external midi interfaces
> > don't work when accessed through the alsa sequencer api. So, your midi
> > keyboard can't be used to control software synthesis, for example. I
> > tried to tickle kernel gurus to pay attention to this one but almost
> > nobody responded to my posts in lkml. One suggestion made midi input
> > work but the internal timer in the alsa seq api is not working (I have
> > not had time to try to get that fixed - maybe this week).
> >
> > You may notice there is _no_ realtime preemption patches for 2.6.27.x
> > yet (and 2.6.28 is already in the rc status stage!). At least not in the
> > official web site. There is a tree somewhere I tried but at least for me
> > that did not result in a bootable kernel.
> >
> > So.... back to the original question:
> >
> > I could (and probably will) release a 2.6.26.x based rt kernel for fc10
> > soon, with the above mentioned caveats... (so not very usable).
> >
> > Right now I'm just running Fedora's kernel on my fc10 test machine....
> > :-(
> >
> > [the Fedora kernel developers are not interested in the rt patches and
> > currently RedHat's GRM kernel _is_ based on 2.6.24[*], so I don't
> > anticipate much change coming soon, the relevant gurus are not working
> > in up to date patches AFAICT]
> >
> > -- Fernando
> >
> > PS: That's the realtime commercial offering from RedHat and presumably
> > what Ingo is working on, see here:
> > http://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/RHEMRG/SRPMS/
> >
> >
> >
> >
> >> On Sat, Nov 29, 2008 at 2:12 PM, Steve Harris <swh@xxxxxxxxxxxxxxx> wrote:
> >>
> >>> I've just tried it, on a machine with with a fresh FC10 install, all
> >>> seems to work fine.
> >>>
> >>> - Steve
> >>>
> >>> On 26 Nov 2008, at 22:32, Fernando Lopez-Lezcano wrote:
> >>>
> >>>
> >>>> Well, in tune with the universe Planet CCRMA crash lands its tiny
> >>>> landing craft on Fedora 10. Luckily no casualties ('cause nobody has
> >>>> tried to run it!) After a rebuild marathon there are quite a few
> >>>> packages available for brave souls to test drive, and a few stragglers
> >>>> still on the way.
> >>>>
> >>>> So far _only_ in the 'planetccrma' repository.
> >>>> No planetcore packages yet[*].
> >>>>
> >>>> Having not tested it I can't really recommend it :-)
> >>>> This shows what's there:
> >>>>
> >>>> http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/10/i386/repoview/index.html
> >>>> http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/10/x86_64/repoview/index.html
> >>>>
> >>>> doing:
> >>>>
> >>>> rpm -Uvh
> >>>> http://ccrma.stanford.edu/planetccrma/mirror/fedora/linux/planetccrma/10/i386/planetccrma-repo-1.1-2.fc10.ccrma.noarch.rpm
> >>>>
> >>>> (all in one line) should get you started...
> >>>>
> >>>> CAVEAT: the Jack on the Planet on fc10 is jackmp 1.9.1! It should work
> >>>> fine, let me (and Stefan on the jack-devel list) know otherwise. It
> >>>> should override the lame 0.109.2 that still comes with Fedora and
> >>>> set up
> >>>> permissions so that any user will have the right to use the realtime
> >>>> scheduler (you will have to log out and login again for that to take
> >>>> effect!).
> >>>>
> >>>> Enjoy! (if possible).
> >>>> -- Fernando
> >>>>
> >>>> [*] the kernel situation has seen no changes...
> >>>>
> >
> >
> > _______________________________________________
> > PlanetCCRMA mailing list
> > PlanetCCRMA@xxxxxxxxxxxxxxxxxx
> > http://ccrma-mail.stanford.edu/mailman/listinfo/planetccrma
> >
> >
>
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