Continued kernel updates for F14?

[stan]

On Wed, 31 Aug 2011 10:09:40 -0500
Richard Shaw <hobbes1069 at gmail.com> wrote:

> On Wed, Aug 31, 2011 at 9:57 AM, stan <gryt2 at q.com> wrote:
> > On Wed, 31 Aug 2011 12:31:36 +0200
> > suvayu ali <fatkasuvayu+linux at gmail.com> wrote:
> >
> >> On Wed, Aug 31, 2011 at 5:01 AM, stan <gryt2 at q.com> wrote:
> >> > as user, rpm -ivh the src.rpm package (you will have to get this
> >> > manually from a repository)
> >> >
> >>
> >> $ yumdownloader --source <package>
> >>
> > That's true if you are getting the package for the currently running
> > system, and it is how I get src.rpm packages on F15.  But doing
> > that on F14 will not get an F15 package.  The OP is running F14 and
> > wants newer kernels.  I didn't, however, check whether
> > yumdownloader has an option like yum to set other repositories
> > while dowloading.  There could be, and in that case your suggestion
> > will work with a little tweaking.
> 
> $ yumdownloader --releasever=15 --source <package>
> 

Thanks for that.  After your post I looked at the options for
yumdownloader, and it turns out it inherits options from yum, and this
is one of them.  Here's what it says about that option:

--releasever=version
              Pretend the current release version is the given string.
This is very useful when  combined  with --installroot. Note that with
the default upstream cachedir, of /var/cache/yum, using this option
will corrupt your cache (and you can use $releasever  in  your
cachedir  configuration  to  stop this).

Is it necessary to have the repo files for the desired repository
installed, or does it get them off the web in a one-off manner?  

Do you know if a  yum clean meta  would clean up the cache corruption
after doing this?

Does this mean it is possible to update a non-running system by using
releasever and installroot? e.g. update F14 from F15
yum -y update --releasever=14 --installdir=<path to F14 root>