[PlanetCCRMA] (re)building the PlanetCCRMA srpms for CentOS

[Fernando Lopez-Lezcano]

On Wed, 2007-11-14 at 17:14 -0800, Fernando Lopez-Lezcano wrote:
> On Wed, 2007-11-14 at 18:43 -0600, Wade Nelson wrote:
> > On Wed, 14 Nov 2007 16:21:51 -0800, "Fernando Lopez-Lezcano"
> > <nando@ccrma.Stanford.EDU> said:
> > > On Wed, 2007-11-14 at 17:13 -0600, Wade Nelson wrote:
> > > > I'm starting to try my hand at rebuilding the PlanetCCRMA SRPMS for
> > > > CentOS 5, and I had a couple questions:
> > > > 
> > > > 1) Would it be better to apply the PlanetCCRMA kernel patchset to the
> > > > latest CentOS kernel or do a straight rebuild of one of the PlanetCCRMA
> > > > kernel SRPMS? 
> > > 
> > > Probably a straight rebuild and hope that userland in centos5 is not too
> > > old to support the latest kernels. That is the problem of centos, long
> > > term. 
> > > 
> > > > I'm leaning towards applying the patches to the CentOS
> > > > kernels just for the sake of keeping as close as possible to the CentOS
> > > > base (the latest PlanetCCRMA kernels are kernel versions significantly
> > > > newer than what CentOS ships).
> > > 
> > > The problem with that approach is that the versions of the realtime
> > > patches that you will be able to apply are very old. 
> > > 
> > > I could try a rebuild of the latest kernel (which I just released for
> > > Fedora 8 and plan on releasing for Fedora 7 & 6) for CentOS 5. Would you
> > > be able to try it out? I did rebuild older versions as a trial under
> > > CentOS a while back and they seemed to work fine. 
> > 
> > I haven't kept up with kernel changes all that much, but I iirc the
> > newer kernels use a new libata stack that labels all hard disks as
> > /dev/sd* whereas CentOS's version still uses the /dev/hd* scheme for IDE
> > drives. 
> 
> Oh, yes, I take care of that. In < fc7 the config files are changed at
> build time so that the old IDE driver is used. So no problems there. I'm
> running 2.6.22 on fc6 with no problems (and have to try a recent build
> of 2.6.23) - and centos5 is based on fc6. But of course at some point it
> is going to break, or need help with userland upgrades. 

I did a quick test yesterday and 2.6.23-1.rt11.1 does boot fine (AFAICT,
no major issues I could see) on my laptop when booting centos5 from an
external usb disk - I get usb disk timeouts but that's another matter.
Just to keep you up to date. 

-- Fernando