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Hi :)
Proper Server OSes and command&control systems on such things as the space
station and presumably military systems can often do kernel upgrades
without needing to reboot.  The requirement for minimal down-time is
probably a major reason why such systems tend to be BSD, Gnu&Linux and
other unix-based platforms and why IWndows has such a tough time trying to
crack into such markets.

However, desktops do generally need to reboot at the slightest thing, let
alone kernel updates.
Regards from
Tom :)




On 7 June 2014 21:18, MR ZenWiz <mrzenwiz@gmail.com> wrote:

On Sat, Jun 7, 2014 at 10:31 AM, J.B. Nicholson-Owens
<jbn@forestfield.org> wrote:
:

On most OSes (including GNU/Linux) I doubt one can update (in other
words,
change) something as low-level as an operating system's kernel and
continue
to run the system normally. After the update and before the reboot, the
new
kernel is updated on the primary storage medium and the old kernel is
still
running in memory. I'd imagine that there are all sorts of kernel
dependencies where the currently-running kernel and newly-installed
kernel
differ. Therefore you'll see lots of adverse effects for the currently
running system which are resolved by getting everything rebased on the
updated kernel. Hence kernel update packages are marked to require a
reboot
as soon as possible.


I've never seen that happen before, but it makes sense.

Now if I knew why the update got stuck running depmod for more than
ten minutes, I'd feel more comfortable.  Oh, well.

Thanks.

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