[[!meta copyright="Copyright © 2010, 2012, 2013 Free Software Foundation, Inc."]] [[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable id="license" text="Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled [[GNU Free Documentation License|/fdl]]."]]"""]] [[!tag open_issue_gnumach]] There currently is no kernel preemption in GNU Mach. If GNU Mach were made a a preemptive kernel, using [[continuation]]s would probably no longer make sense as the kernel itself, that is, kernel threads can be preempted, and then their full state needs to be preserved. See also [[open_issues/multithreading]].