Live patching for Linux 3.20

And it was officially merged into Linux this evening:<p><a href="https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1d9c5d79e6e4385aea6f69c23ba543717434ed70" rel="nofollow">https:&#x2F;&#x2F;git.kernel.org&#x2F;cgit&#x2F;linux&#x2F;kernel&#x2F;git&#x2F;torvalds&#x2F;linux....</a>

Here&#x27;s some more discussion from LWN: <a href="https://lwn.net/Articles/597407/" rel="nofollow">https:&#x2F;&#x2F;lwn.net&#x2F;Articles&#x2F;597407&#x2F;</a><p>(Note: from May 2014)

And for those who prefer the official lkml.org link:<p><a href="https://lkml.org/lkml/2015/2/9/534" rel="nofollow">https:&#x2F;&#x2F;lkml.org&#x2F;lkml&#x2F;2015&#x2F;2&#x2F;9&#x2F;534</a>

This is cool as fuck, I didn&#x27;t know about kpatch or kGraft.<p>Does anyone know if any other OSs have live kernel patching?

And lkml discussion of the follow-up patches: <a href="http://lkml.iu.edu/hypermail/linux/kernel/1502.1/00694.html" rel="nofollow">http:&#x2F;&#x2F;lkml.iu.edu&#x2F;hypermail&#x2F;linux&#x2F;kernel&#x2F;1502.1&#x2F;00694.html</a>

Does anyone have a simple example of how this would work? I can&#x27;t wrap my head around code evolving during runtime for any arbitrary binary change.

An interesting case of the Cathedral causing siloed duplication, and the Bazaar creating a better solution without duplication.