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[[!meta copyright="Copyright © 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
-2010 Free Software Foundation, Inc."]]
+2010, 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
@@ -47,3 +47,14 @@ License|/fdl]]."]]"""]]
- [An IO System for Mach](http://shakthimaan.com/downloads/hurd/An%20IO%20System%20for%20Mach.pdf)
- [A Programmers' Guide to Mach System Call](http://shakthimaan.com/downloads/hurd/A.Programmers.Guide.to.the.Mach.System.Calls.pdf)
+
+
+# IRC, freenode, #hurd, 2013-09-15
+
+ <teythoon> braunr: btw, are there multiple kernel threads in gnumach?
+ <teythoon> and is it safe to do a synchronous rpc call to a userspace
+ server?
+ <braunr> teythoon: there are yes, but few
+ <braunr> teythoon: the main (perhaps only) kernel thread is the page daemon
+ <braunr> and no, it's not safe to do synchronous calls to userspace
+ <braunr> except to the default pager