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A regular occurrence in updating Ubuntu is kernel updates, which require a restart. There are applications which negate the need for a restart after a kernel update e.g. ksplice.

Why doesn't Ubuntu use tools similar to ksplice? Are there security, memory, etc. concerns to not restarting immediately/ever? Or, can these issues be overcome (i.e. are they just bugs)?

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For now ksplice is free to download (but not open-source) for Ubuntu Desktop, shame it's not "free" software (only free in cost). –  hayd Jul 17 '12 at 15:47
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2 Answers 2

up vote 12 down vote accepted
+50

I found this IRC log from Feb. containing a question and answer session with Peter Graner (pgraner), the Kernel Engineering Manager:

<Taek> QUESTION: Is there plans or even talk about having a system update without having to restart or install third party software such as ksplice.

<pgraner> Taek, the kernel will support kplice however we have no plans to do such a thing, there is already a commercial venture that does that

<sebsebseb> QUESTION: Do you think that Ubuntu Desktop might use Ksplice in the future?

<pgraner> sebsebseb, No as stated in the last question

Not really a satisfying answer to the why, but the best I could find.

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If you view this answer in conjuntion with the answer from Mike. It sounds like they wont use ksplice because there is a commercial venture which holds a patent, which is violated by ksplice –  trampster Aug 1 '13 at 22:27
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