VM startup: fatal error: FLAG_SET_ERGO cannot be used to set an inval…

…id value for NonNMethodCodeHeapSize

src/hotspot/share/code/codeCache.cpp

@@ -227,6 +227,11 @@ void CodeCache::initialize_heaps() {
 
   if (!non_nmethod.set) {
     non_nmethod.size += compiler_buffer_size;
+    // Further down, just before FLAG_SET_ERGO(), all segment sizes are
+    // aligned down to the next lower multiple of min_size. For large page
+    // sizes, this may result in (non_nmethod.size == 0) which is not acceptable.
+    // Therefore, force non_nmethod.size to at least min_size.
+    non_nmethod.size  = MAX2(non_nmethod.size, min_size);
   }
 
   if (!profiled.set && !non_profiled.set) {