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Red Hat's Dynamic Kernel Patching Project

It seems that Red Hat, too, has a project working on patching running kernels. "kpatch allows you to patch a Linux kernel without rebooting or restarting any processes. This enables sysadmins to apply critical security patches to the kernel immediately, without having to wait for long-running tasks to complete, users to log off, or scheduled reboot windows. It gives more control over uptime without sacrificing security or stability." It looks closer to ksplice than to SUSE's kGraft in that it patches out entire functions at a time.

Read more at LWN
 

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