Feature proposal: Rebootless Installer
Richard W.M. Jones
rjones at redhat.com
Tue Jul 14 15:50:06 UTC 2009
On Tue, Jul 14, 2009 at 09:27:08AM -0600, Douglas McClendon wrote:
> As with a current LiveOS installation, the installation media kernel is
> the running kernel. Even if the f11 installer already allows you to
> trigger a chrooted yum update as part of the install, you won't be
> running the updated kernel until after a reboot.
Is it the case that the installation kernel is always UP,
whereas the real kernel would probably be SMP nowadays?
> ... Same as RebootlessInstaller ... until ksplice ...
I don't think ksplice changes things -- it seems to only work for very
minor kernel patches. For example, any change to the layout of a
kernel structure would appear to be incompatible with ksplice. Thus
it seems highly unlikely it'll ever work in its current form for
arbitrary kernel revisions.
<quote>
Before you use ksplice-create on a patch, you should confirm that the
desired source code change does not make any semantic changes to
kernel data structures--that is, changes that would require existing
instances of kernel data structures to be transformed (e.g., a patch
that adds a field to a global data structure would require the
existing data structures to change). If you use Ksplice on a patch
that changes data structure semantics, Ksplice will not detect the
problem and you could experience kernel problems as a result.
</quote>
from: http://www.ksplice.com/doc/ksplice-create
Rich.
--
Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones
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