Yes, happily the ZFS license (CDDL) and (star)BSD licenses seem to be compatible. Yay for the BSDs of the world!<p>Unfortunately, most of the OSS&#x2F;Free Software world is running a Linux kernel whose license (GPLv2) <i>isn&#x27;t</i> compatible with the CDDL according to current thinking by most of the people who know about these things. End of story, AFAICT. (I mean there&#x27;s a theoretical possibility of relicensing the Linux kernel, but given the contributor profile it&#x27;s probably impossible in any practical sense. AFAICT it would be <i>far</i> more likely&#x2F;practical for ZFS to be re-licensed under a GPL-compatible license if only the corporate overlords were so inclined.)<p>EDIT: Just a minor edit: I didn&#x27;t mean that it&#x27;s &quot;unfortunate&quot; that most of the OSS&#x2F;Free Software world is running Linux. It works pretty damn well. My &quot;unfortunately&quot; remark was merely about the fact that licenses may be (or are) incompatible.