This comes in response to a policy change Red Hat had operated in early 2011 with the goal of undercutting Oracle and other vendor's strategy of poaching RedHat's customers. The Ksplice team says they've doing the work they're now making available since the policy was implemented; they claim to be now making it public because they "feel everyone in the Linux community can benefit from the work".
For Ksplice, we build individual updates for each change and rely on source patches that are broken-out, not a giant tarball. Otherwise, we wouldn’t be able to take the right patches to create individual updates for each fix, and to skip over the noise — like a change that speeds up bootup — which is unnecessary for an already-running system. We’ve been taking the monolithic Red Hat patch tarball and breaking it into smaller commits internally ever since they introduced this change.
At Oracle, we feel everyone in the Linux community can benefit from the work we already do to get our jobs done, so now we’re sharing these broken-out patches publicly.