From 995d54161fed657f38753813f55d0591e77a42e3 Mon Sep 17 00:00:00 2001
From: Ivan Walulya <iwalulya@openjdk.org>
Date: Fri, 2 May 2025 12:54:09 +0000
Subject: [PATCH] 8355681: G1HeapRegionManager::find_contiguous_allow_expand
 ignores free regions when checking regions available for allocation

Reviewed-by: tschatzl, ayang
---
 src/hotspot/share/gc/g1/g1HeapRegionManager.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hotspot/share/gc/g1/g1HeapRegionManager.cpp b/src/hotspot/share/gc/g1/g1HeapRegionManager.cpp
index 0098839c1a4..be469b655f7 100644
--- a/src/hotspot/share/gc/g1/g1HeapRegionManager.cpp
+++ b/src/hotspot/share/gc/g1/g1HeapRegionManager.cpp
@@ -478,7 +478,7 @@ uint G1HeapRegionManager::find_contiguous_in_free_list(uint num_regions) {
 
 uint G1HeapRegionManager::find_contiguous_allow_expand(uint num_regions) {
   // Check if we can actually satisfy the allocation.
-  if (num_regions > available()) {
+  if (num_regions > (num_free_regions() + available())) {
     return G1_NO_HRM_INDEX;
   }
   // Find any candidate.