Index: kernel/generic/src/proc/scheduler.c
===================================================================
--- kernel/generic/src/proc/scheduler.c	(revision 8d6c1f139a0fd8ef52d018e1c68b0dcca5ec1ec9)
+++ kernel/generic/src/proc/scheduler.c	(revision ef15fbbac0915e003c970e47614ca22e47e3ed96)
@@ -586,5 +586,4 @@
 	 * Searching least priority queues on all CPU's first and most priority
 	 * queues on all CPU's last.
-	 *
 	 */
 	size_t acpu;
@@ -620,23 +619,24 @@
 			
 			while (link != &(cpu->rq[rq].rq_head)) {
-				thread = (thread_t *) list_get_instance(link, thread_t, rq_link);
+				thread = (thread_t *) list_get_instance(link,
+				    thread_t, rq_link);
 				
 				/*
-				 * We don't want to steal CPU-wired threads
-				 * neither threads already stolen. The latter
-				 * prevents threads from migrating between CPU's
-				 * without ever being run. We don't want to
-				 * steal threads whose FPU context is still in
-				 * CPU.
-				 *
+				 * Do not steal CPU-wired threads, threads
+				 * already stolen, threads for which migration
+				 * was temporarily disabled or threads whose
+				 * FPU context is still in the CPU.
 				 */
 				irq_spinlock_lock(&thread->lock, false);
 				
-				if ((!(thread->flags & (THREAD_FLAG_WIRED | THREAD_FLAG_STOLEN)))
-				    && (!(thread->fpu_context_engaged))) {
+				if (!(thread->flags & THREAD_FLAG_WIRED) &&
+				    !(thread->flags & THREAD_FLAG_STOLEN) &&
+				    !thread->nomigrate &&
+				    !thread->fpu_context_engaged) {
 					/*
 					 * Remove thread from ready queue.
 					 */
-					irq_spinlock_unlock(&thread->lock, false);
+					irq_spinlock_unlock(&thread->lock,
+					    false);
 					
 					atomic_dec(&cpu->nrdy);
@@ -660,5 +660,6 @@
 				 */
 				
-				irq_spinlock_pass(&(cpu->rq[rq].lock), &thread->lock);
+				irq_spinlock_pass(&(cpu->rq[rq].lock),
+				    &thread->lock);
 				
 #ifdef KCPULB_VERBOSE
Index: kernel/generic/src/proc/thread.c
===================================================================
--- kernel/generic/src/proc/thread.c	(revision 8d6c1f139a0fd8ef52d018e1c68b0dcca5ec1ec9)
+++ kernel/generic/src/proc/thread.c	(revision ef15fbbac0915e003c970e47614ca22e47e3ed96)
@@ -322,4 +322,5 @@
 	thread->cpu = NULL;
 	thread->flags = flags;
+	thread->nomigrate = 0;
 	thread->state = Entering;
 	
@@ -482,4 +483,21 @@
 	/* Not reached */
 	while (true);
+}
+
+/** Prevent the current thread from being migrated to another processor. */
+void thread_migration_disable(void)
+{
+	ASSERT(THREAD);
+
+	THREAD->nomigrate++;
+}
+
+/** Allow the current thread to be migrated to another processor. */
+void thread_migration_enable(void)
+{
+	ASSERT(THREAD);
+	ASSERT(THREAD->nomigrate > 0);
+
+	THREAD->nomigrate--;
 }