Add cpuset, an api for thread to cpu binding and cpu resource grouping

and assignment.
 - Add a reference to a struct cpuset in each thread that is inherited from
   the thread that created it.
 - Release the reference when the thread is destroyed.
 - Add prototypes for syscalls and macros for manipulating cpusets in
   sys/cpuset.h
 - Add syscalls to create, get, and set new numbered cpusets:
   cpuset(), cpuset_{get,set}id()
 - Add syscalls for getting and setting affinity masks for cpusets or
   individual threads: cpuid_{get,set}affinity()
 - Add types for the 'level' and 'which' parameters for the cpuset.  This
   will permit expansion of the api to cover cpu masks for other objects
   identifiable with an id_t integer.  For example, IRQs and Jails may be
   coming soon.
 - The root set 0 contains all valid cpus.  All thread initially belong to
   cpuset 1.  This permits migrating all threads off of certain cpus to
   reserve them for special applications.

Sponsored by:	Nokia
Discussed with:	arch, rwatson, brooks, davidxu, deischen
Reviewed by:	antoine

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/libc/sys/Symbol.map b/lib/libc/sys/Symbol.map
index 59d5190..7ca8ff3 100644
--- a/lib/libc/sys/Symbol.map
+++ b/lib/libc/sys/Symbol.map
@@ -66,6 +66,11 @@ FBSD_1.0 {
 	clock_settime;
 	close;
 	connect;
+	cpuset;
+	cpuset_getid;
+	cpuset_setid;
+	cpuset_getaffinity;
+	cpuset_setaffinity;
 	dup;
 	dup2;
 	eaccess;
@@ -450,6 +455,16 @@ FBSDprivate_1.0 {
 	__sys_close;
 	_connect;
 	__sys_connect;
+	__cpuset;
+	__sys_cpuset;
+	__cpuset_getid;
+	__sys_cpuset_getid;
+	__cpuset_setid;
+	__sys_cpuset_setid;
+	__cpuset_getaffinity;
+	__sys_cpuset_getaffinity;
+	__cpuset_setaffinity;
+	__sys_cpuset_setaffinity;
 	_dup;
 	__sys_dup;
 	_dup2;