[NTOS:MM] Do not zero-fill pages when not needed

ntoskrnl/mm/ARM3/pagfault.c

@@ -674,6 +674,11 @@ MiResolveDemandZeroFault(IN PVOID Address,
             PageFrameNumber = MiRemoveAnyPage(Color);
             NeedZero = TRUE;
         }
+        else
+        {
+            /* Page guaranteed to be zero-filled */
+            NeedZero = FALSE;
+        }
     }
     else
     {
@@ -688,6 +693,8 @@ MiResolveDemandZeroFault(IN PVOID Address,
         {
             /* System wants a zero page, obtain one */
             PageFrameNumber = MiRemoveZeroPage(Color);
+            /* No need to zero-fill it */
+            NeedZero = FALSE;
         }
     }