Update the Linux kernel without rebooting? is already a reality

The news published in Malavida is very interesting , where the author tells us that thanks to the collaboration between developers from Suse and Red Hat , from version 3.20 of the Linux Kernel onwards, we will be able to update it without the need to restart the computer.

What started as something independent

It all started with SUSE and Red Hat working separately to find a way to update the kernel without restarting the computer. In April 2014, Jiri Slaby (now Jiri Kosina) from SUSE presented kGraft , and in July, Josh Poimboeuf from Red Hat presented KPatch , highlighting its advantages over kGraft . Apparently , the two developers agreed and decided to collaborate.

Of course, all the technical documentation can be found in the message sent to the mailing list.

What does this bring us to the end user?

For ordinary users this does not make a big difference (I suppose), because in my very particular case with Archlinux, for the only reason I have to restart after updating a Kernel, it is because removable devices are not mounted. Although this may just happen to me, or maybe it can be solved by loading a module.

I also don't know if this means that if we update to a higher kernel version and there's an incompatibility with our hardware , the whole thing will be for nothing. It remains to be seen, but without a doubt, whether it offers any benefit or not, this would be quite useful when working with servers, as we wouldn't have to restart any of them after each update.

How do they see it?


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