diff --git a/runtime/gc_modron_startup/mmparseXgc.cpp b/runtime/gc_modron_startup/mmparseXgc.cpp
index 88456ce02bd..cc206b7e6ab 100644
--- a/runtime/gc_modron_startup/mmparseXgc.cpp
+++ b/runtime/gc_modron_startup/mmparseXgc.cpp
@@ -1448,6 +1448,32 @@ gcParseXgcArguments(J9JavaVM *vm, char *optArg)
 			continue;
 		}
 
+		/* Check if there is a request to set the suballocator reservation increment size. */
+		if (try_scan(&scan_start, "suballocatorIncrementSize=")) {
+			if (!scan_udata_memory_size_helper(vm, &scan_start, &extensions->suballocatorIncrementSize, "suballocatorIncrementSize=")) {
+				returnValue = JNI_EINVAL;
+				break;
+			}
+			if (0 == extensions->suballocatorIncrementSize) {
+				j9nls_printf(PORTLIB, J9NLS_ERROR, J9NLS_GC_OPTIONS_VALUE_MUST_BE_ABOVE, "-Xgc:suballocatorIncrementSize=", (UDATA)0);
+				returnValue = JNI_EINVAL;
+				break;
+			}
+			continue;
+		}
+
+		/* Check if there is a request to enable the mmap-based allocation for the suballocator (Linux only). */
+		if (try_scan(&scan_start, "suballocatorQuickAllocEnable")) {
+			extensions->suballocatorQuickAlloc = true;
+			continue;
+		}
+
+		/* Check if there is a request to disable the mmap-based allocation for the suballocator (Linux only). */
+		if (try_scan(&scan_start, "suballocatorQuickAllocDisable")) {
+			extensions->suballocatorQuickAlloc = false;
+			continue;
+		}
+
 		/* for testing and service reasons, split heaps is currently restricted to Win32 only */
 #if defined(J9VM_GC_GENERATIONAL) && (defined(WIN32) && !defined(WIN64))
 		/* see if we are supposed to enable split heaps */
diff --git a/test/functional/cmdLineTests/gcsuballoctests/gcsuballoctests.xml b/test/functional/cmdLineTests/gcsuballoctests/gcsuballoctests.xml
index 021de939d76..99168d160b0 100644
--- a/test/functional/cmdLineTests/gcsuballoctests/gcsuballoctests.xml
+++ b/test/functional/cmdLineTests/gcsuballoctests/gcsuballoctests.xml
@@ -24,10 +24,11 @@
 
 <!DOCTYPE suite SYSTEM "cmdlinetester.dtd">
 
-<suite id="J9 GC  Tests" timeout="60">
- 
- <!-- Following tests are for compressedrefs platforms. 
-	Because -Xgc:suballocatorInitialSize= and -Xgc:suballocatorCommitSize= options are defined only for compressedrefs. -->
+<suite id="J9 GC Suballocator Tests" timeout="60">
+
+ <!-- Following tests are for compressedrefs platforms because -Xgc:suballocatorInitialSize=,
+      -Xgc:suballocatorCommitSize=, -Xgc:suballocatorIncrementSize=, -Xgc:suballocatorQuickAllocDisable
+      and -Xgc:suballocatorQuickAllocEnable options are used only for compressedrefs. -->
 
  <test id="-Xgc:suballocatorInitialSize=100m">
   <command>$EXE$ -Xgc:suballocatorInitialSize=100m -version</command>
@@ -48,12 +49,42 @@
   <output regex="no" type="failure">JVMDUMP006I</output>
   <output regex="no" type="failure">Processing dump event</output>
  </test>
- 
+
+ <test id="-Xgc:suballocatorIncrementSize=100m">
+  <command>$EXE$ -Xgc:suballocatorIncrementSize=100m -version</command>
+  <output regex="no" type="success">version</output>
+  <output regex="yes" caseSensitive="yes" javaUtilPattern="yes" type="required">(Semeru|OpenJDK|Java\(TM\) SE) Runtime</output>
+  <output regex="no" type="failure">Exception</output>
+  <output regex="no" type="failure">Error</output>
+  <output regex="no" type="failure">JVMDUMP006I</output>
+  <output regex="no" type="failure">Processing dump event</output>
+ </test>
+
+ <test id="-Xgc:suballocatorQuickAllocEnable">
+  <command>$EXE$ -Xgc:suballocatorQuickAllocEnable -version</command>
+  <output regex="no" type="success">version</output>
+  <output regex="yes" caseSensitive="yes" javaUtilPattern="yes" type="required">(Semeru|OpenJDK|Java\(TM\) SE) Runtime</output>
+  <output regex="no" type="failure">Exception</output>
+  <output regex="no" type="failure">Error</output>
+  <output regex="no" type="failure">JVMDUMP006I</output>
+  <output regex="no" type="failure">Processing dump event</output>
+ </test>
+
+ <test id="-Xgc:suballocatorQuickAllocDisable">
+  <command>$EXE$ -Xgc:suballocatorQuickAllocDisable -version</command>
+  <output regex="no" type="success">version</output>
+  <output regex="yes" caseSensitive="yes" javaUtilPattern="yes" type="required">(Semeru|OpenJDK|Java\(TM\) SE) Runtime</output>
+  <output regex="no" type="failure">Exception</output>
+  <output regex="no" type="failure">Error</output>
+  <output regex="no" type="failure">JVMDUMP006I</output>
+  <output regex="no" type="failure">Processing dump event</output>
+ </test>
+
  <test id="-Xgc:suballocatorCommitSize=300m">
   <command>$EXE$ -Xgc:suballocatorCommitSize=300m -version</command>
   <!--  JVMJ9GC057E -Xgc:suballocatorCommitSize= must be no greater than -Xgc:suballocatorInitialSize= -->
   <output regex="no" type="success">JVMJ9GC057E</output>
-  <!-- JVMJ9VM015W Initialization error for library j9gc26(2): Failed to initialize -->
+  <!-- JVMJ9VM015W Initialization error for library j9gc29(2): Failed to initialize -->
   <output regex="no" type="required">JVMJ9VM015W</output>
   <output regex="no" caseSensitive="no" type="required">Could not create the Java Virtual Machine.</output>
   <output regex="no" type="failure">version</output>
@@ -61,12 +92,12 @@
   <output regex="no" type="failure">JVMDUMP006I</output>
   <output regex="no" type="failure">Processing dump event</output>
  </test>
- 
+
  <test id="-Xgc:suballocatorCommitSize=0">
   <command>$EXE$ -Xgc:suballocatorCommitSize=0 -version</command>
   <!-- JVMJ9GC036E -Xgc:suballocatorCommitSize= value must be above 0 -->
   <output regex="no" type="success">JVMJ9GC036E</output>
-  <!-- JVMJ9VM015W Initialization error for library j9gc26(2): Failed to initialize -->
+  <!-- JVMJ9VM015W Initialization error for library j9gc29(2): Failed to initialize -->
   <output regex="no" type="required">JVMJ9VM015W</output>
   <output regex="no" caseSensitive="no" type="required">Could not create the Java Virtual Machine.</output>
   <output regex="no" type="failure">version</output>
@@ -79,7 +110,20 @@
   <command>$EXE$ -Xgc:suballocatorInitialSize=0 -version</command>
   <!-- JVMJ9GC036E -Xgc:suballocatorInitialSize= value must be above 0 -->
   <output regex="no" type="success">JVMJ9GC036E</output>
-  <!-- JVMJ9VM015W Initialization error for library j9gc26(2): Failed to initialize -->
+  <!-- JVMJ9VM015W Initialization error for library j9gc29(2): Failed to initialize -->
+  <output regex="no" type="required">JVMJ9VM015W</output>
+  <output regex="no" caseSensitive="no" type="required">Could not create the Java Virtual Machine.</output>
+  <output regex="no" type="failure">version</output>
+  <output regex="yes" caseSensitive="yes" javaUtilPattern="yes" type="failure">(Semeru|OpenJDK|Java\(TM\) SE) Runtime</output>
+  <output regex="no" type="failure">JVMDUMP006I</output>
+  <output regex="no" type="failure">Processing dump event</output>
+ </test>
+
+ <test id="-Xgc:suballocatorIncrementSize=0">
+  <command>$EXE$ -Xgc:suballocatorIncrementSize=0 -version</command>
+  <!-- JVMJ9GC036E -Xgc:suballocatorIncrementSize= value must be above 0 -->
+  <output regex="no" type="success">JVMJ9GC036E</output>
+  <!-- JVMJ9VM015W Initialization error for library j9gc29(2): Failed to initialize -->
   <output regex="no" type="required">JVMJ9VM015W</output>
   <output regex="no" caseSensitive="no" type="required">Could not create the Java Virtual Machine.</output>
   <output regex="no" type="failure">version</output>
@@ -92,7 +136,7 @@
   <command>$EXE$ -Xgc:suballocatorCommitSize=512m -Xgc:suballocatorInitialSize=256m -version</command>
   <!-- JVMJ9GC057E -Xgc:suballocatorCommitSize= must be no greater than -Xgc:suballocatorInitialSize= -->
   <output regex="no" type="success">JVMJ9GC057E</output>
-  <!-- JVMJ9VM015W Initialization error for library j9gc26(2): Failed to initialize -->
+  <!-- JVMJ9VM015W Initialization error for library j9gc29(2): Failed to initialize -->
   <output regex="no" type="required">JVMJ9VM015W</output>
   <output regex="no" caseSensitive="no" type="required">Could not create the Java Virtual Machine.</output>
   <output regex="no" type="failure">version</output>
@@ -176,4 +220,3 @@
  </test>
 
 </suite>
-