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Re: KSplice in Fedora?



On Mon, Jun 29, 2009 at 10:58 PM, Bill McGonigle <bill bfccomputing com> wrote:
On 06/29/2009 10:49 PM, Kevin Kofler wrote:
> It can only handle small patches which don't change
> any data structures. So the official Fedora kernel updates will never be
> suitable to be distributed through KSplice.

And to date there hasn't really been any compelling reason to issue tiny
patch security-updated kernels, 'cause you have to reboot anyway, right?
 But as the technology improves, more opportunities arise.

I recall deploying some sort of hack workaround for the vmsplice exploit
a while back on a whole bunch of machines (Fedora or downstreams) that
were going to need a reboot scheduled up to a week in the future.  This
kind of technology would have been really swell to have then.

Lots of reasons to not want to reboot machines - most of the arguments
for supporting laptop suspend would fit.  Some of them may fall into the
"protecting users from themselves" category, but that's not a bad thing
either.

-Bill

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Also, while KSplice is currently being used for kernel updates, it isn't limited to those. It could be adapted to work for other updates that normally force a reboot. Though, I can't think of any off the top of my head, it has been over a week since I ran the updater...

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