[PlanetCCRMA] [Fedora-music-list] fedora 15 vs. the rt kernel

Fernando Lopez-Lezcano nando at ccrma.Stanford.EDU
Tue Jun 14 17:14:57 PDT 2011

On 06/14/2011 03:19 PM, Orcan Ogetbil wrote:
> On Tue, Jun 14, 2011 at 6:11 PM, Fernando Lopez-Lezcano  wrote:
>> Hi all, just a couple of comments about rt patched kernels and Fedora 15.
>> In short, it looks like 2.6.33.x is too old to work with the new systemd
>> startup system in Fedora 15. While I did manage to boot, shutting down
>> did not work (at least not cleanly) and others have not been able to
>> even boot "legacy" 2.6.33.x-rtxx kernels in Fedora 15. Apparently this
>> is the issue:
>>    https://bugzilla.redhat.com/show_bug.cgi?id=628004
>> So, for now the only option seems to be to use the newest
>> kernel with threaded irqs active. This is _not_ a fully rt patched
>> kernel and my initial tests with the cyclictest utility show higher
>> latency hits than rt31. I'm currently building and testing packages.
>> Another option would be to revert (for now) from systemd to the previous
>> startup scripts. I don't know if that is even possible, maybe others in
>> the lists would be able to comment.
> Hi Fernando,
> I read but not tried that passing the argument
> init=/sbin/upstart
> to the kernel at boot should load upstart. I have not tried it myself though.

Looks like that is a workaround (Richard Brown mentioned it to me on an 
off-list email yesterday). I tried it (first yum install upstart if you 
don't have it), adding init=/sbin/upstart allows the machine to boot 
fine. There are some audit errors printed that were not there before but 
things seem to work.

-- Fernando

More information about the PlanetCCRMA mailing list