X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm.c;h=27edd92ac677bf2c79b4cca6e1658a59eae0a081;hp=fcc6ea55be17391534bff62893118e1018c58b61;hb=e8c6db81c1ad76fab0f6a783c03654145e41599d;hpb=5567d84b2bb858aaed18b724a59be2af09674988

diff --git a/palacios/src/palacios/vmm.c b/palacios/src/palacios/vmm.c
index fcc6ea5..27edd92 100644
--- a/palacios/src/palacios/vmm.c
+++ b/palacios/src/palacios/vmm.c
@@ -174,9 +174,17 @@ void v3_yield_cond(struct guest_info * info) {
     }
 }
 
+/* 
+ * unconditional cpu yield 
+ * if the yielding thread is a guest context, the guest quantum is reset on resumption 
+ * Non guest context threads should call this function with a NULL argument
+ */
 void v3_yield(struct guest_info * info) {
     V3_Yield();
-    rdtscll(info->yield_start_cycle);
+
+    if (info) {
+	rdtscll(info->yield_start_cycle);
+    }
 }