diff --git a/src/hotspot/os/aix/os_aix.cpp b/src/hotspot/os/aix/os_aix.cpp
index 0a8efbece8d..327508e1118 100644
--- a/src/hotspot/os/aix/os_aix.cpp
+++ b/src/hotspot/os/aix/os_aix.cpp
@@ -1753,10 +1753,9 @@ bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
   return true;
 }
 
-bool os::remove_stack_guard_pages(char* addr, size_t size) {
+void os::remove_stack_guard_pages(char* addr, size_t size) {
   // Do not call this; no need to commit stack pages on AIX.
   ShouldNotReachHere();
-  return true;
 }
 
 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) {
diff --git a/src/hotspot/os/bsd/os_bsd.cpp b/src/hotspot/os/bsd/os_bsd.cpp
index 81320b4f1aa..0ed5335adc3 100644
--- a/src/hotspot/os/bsd/os_bsd.cpp
+++ b/src/hotspot/os/bsd/os_bsd.cpp
@@ -1782,10 +1782,8 @@ bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
   return os::commit_memory(addr, size, !ExecMem);
 }
 
-// If this is a growable mapping, remove the guard pages entirely by
-// munmap()ping them.  If not, just call uncommit_memory().
-bool os::remove_stack_guard_pages(char* addr, size_t size) {
-  return os::uncommit_memory(addr, size);
+void os::remove_stack_guard_pages(char* addr, size_t size) {
+  os::uncommit_memory(addr, size);
 }
 
 // 'requested_addr' is only treated as a hint, the return value may or
diff --git a/src/hotspot/os/linux/os_linux.cpp b/src/hotspot/os/linux/os_linux.cpp
index 7190845a8ba..09c514e3d05 100644
--- a/src/hotspot/os/linux/os_linux.cpp
+++ b/src/hotspot/os/linux/os_linux.cpp
@@ -3523,6 +3523,9 @@ bool os::pd_uncommit_memory(char* addr, size_t size, bool exec) {
     log_trace(os, map)("mmap failed: " RANGEFMT " errno=(%s)",
                        RANGEFMTARGS(addr, size),
                        os::strerror(ep.saved_errno()));
+    if (ep.saved_errno() == ENOMEM) {
+      fatal("Failed to uncommit " RANGEFMT ". It is possible that the process's maximum number of mappings would have been exceeded. Try increasing the limit.", RANGEFMTARGS(addr, size));
+    }
     return false;
   }
   return true;
@@ -3633,14 +3636,16 @@ bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
 // It's safe to always unmap guard pages for primordial thread because we
 // always place it right after end of the mapped region.
 
-bool os::remove_stack_guard_pages(char* addr, size_t size) {
-  uintptr_t stack_extent, stack_base;
+void os::remove_stack_guard_pages(char* addr, size_t size) {
 
   if (os::is_primordial_thread()) {
-    return ::munmap(addr, size) == 0;
+    if (::munmap(addr, size) != 0) {
+      fatal("Failed to munmap " RANGEFMT, RANGEFMTARGS(addr, size));
+    }
+    return;
   }
 
-  return os::uncommit_memory(addr, size);
+  os::uncommit_memory(addr, size);
 }
 
 // 'requested_addr' is only treated as a hint, the return value may or
diff --git a/src/hotspot/os/windows/os_windows.cpp b/src/hotspot/os/windows/os_windows.cpp
index b0b7ae18106..2e819e26e37 100644
--- a/src/hotspot/os/windows/os_windows.cpp
+++ b/src/hotspot/os/windows/os_windows.cpp
@@ -3281,11 +3281,10 @@ static char* map_or_reserve_memory_aligned(size_t size, size_t alignment, int fi
     // Do manual alignment
     aligned_base = align_up(extra_base, alignment);
 
-    bool rc = (file_desc != -1) ? os::unmap_memory(extra_base, extra_size) :
-                                  os::release_memory(extra_base, extra_size);
-    assert(rc, "release failed");
-    if (!rc) {
-      return nullptr;
+    if (file_desc != -1) {
+      os::unmap_memory(extra_base, extra_size);
+    } else {
+      os::release_memory(extra_base, extra_size);
     }
 
     // Attempt to map, into the just vacated space, the slightly smaller aligned area.
@@ -3681,8 +3680,8 @@ bool os::pd_create_stack_guard_pages(char* addr, size_t size) {
   return os::commit_memory(addr, size, !ExecMem);
 }
 
-bool os::remove_stack_guard_pages(char* addr, size_t size) {
-  return os::uncommit_memory(addr, size);
+void os::remove_stack_guard_pages(char* addr, size_t size) {
+  os::uncommit_memory(addr, size);
 }
 
 static bool protect_pages_individually(char* addr, size_t bytes, unsigned int p, DWORD *old_status) {
diff --git a/src/hotspot/share/cds/filemap.cpp b/src/hotspot/share/cds/filemap.cpp
index a779fcddfcf..da2d4f6dac2 100644
--- a/src/hotspot/share/cds/filemap.cpp
+++ b/src/hotspot/share/cds/filemap.cpp
@@ -1325,9 +1325,7 @@ char* FileMapInfo::map_auxiliary_region(int region_index, bool read_only) {
 
   if (VerifySharedSpaces && !r->check_region_crc(mapped_base)) {
     aot_log_error(aot)("region %d CRC error", region_index);
-    if (!os::unmap_memory(mapped_base, r->used_aligned())) {
-      fatal("os::unmap_memory of region %d failed", region_index);
-    }
+    os::unmap_memory(mapped_base, r->used_aligned());
     return nullptr;
   }
 
@@ -1654,9 +1652,7 @@ void FileMapInfo::unmap_region(int i) {
         // is released. Zero it so that we don't accidentally read its content.
         aot_log_info(aot)("Region #%d (%s) is in a reserved space, it will be freed when the space is released", i, shared_region_name[i]);
       } else {
-        if (!os::unmap_memory(mapped_base, size)) {
-          fatal("os::unmap_memory failed");
-        }
+        os::unmap_memory(mapped_base, size);
       }
     }
     r->set_mapped_base(nullptr);
diff --git a/src/hotspot/share/gc/parallel/psVirtualspace.cpp b/src/hotspot/share/gc/parallel/psVirtualspace.cpp
index f4b24fa51af..93803cf38e1 100644
--- a/src/hotspot/share/gc/parallel/psVirtualspace.cpp
+++ b/src/hotspot/share/gc/parallel/psVirtualspace.cpp
@@ -78,12 +78,13 @@ bool PSVirtualSpace::shrink_by(size_t bytes) {
   }
 
   char* const base_addr = committed_high_addr() - bytes;
-  bool result = special() || os::uncommit_memory(base_addr, bytes);
-  if (result) {
-    _committed_high_addr -= bytes;
+  if (!special()) {
+    os::uncommit_memory(base_addr, bytes);
   }
 
-  return result;
+  _committed_high_addr -= bytes;
+
+  return true;
 }
 
 #ifndef PRODUCT
diff --git a/src/hotspot/share/gc/shared/cardTable.cpp b/src/hotspot/share/gc/shared/cardTable.cpp
index 34f1847befe..e6e3fdf3d82 100644
--- a/src/hotspot/share/gc/shared/cardTable.cpp
+++ b/src/hotspot/share/gc/shared/cardTable.cpp
@@ -169,9 +169,7 @@ void CardTable::resize_covered_region(MemRegion new_region) {
     // Shrink.
     MemRegion delta = MemRegion(new_committed.end(),
                                 old_committed.word_size() - new_committed.word_size());
-    bool res = os::uncommit_memory((char*)delta.start(),
-                                   delta.byte_size());
-    assert(res, "uncommit should succeed");
+    os::uncommit_memory((char*)delta.start(), delta.byte_size());
   }
 
   log_trace(gc, barrier)("CardTable::resize_covered_region: ");
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp b/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
index ccfc1c036c2..767da5f9bf3 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
@@ -1775,12 +1775,7 @@ void ShenandoahHeap::scan_roots_for_iteration(ShenandoahScanObjectStack* oop_sta
 
 void ShenandoahHeap::reclaim_aux_bitmap_for_iteration() {
   if (!_aux_bitmap_region_special) {
-    bool success = os::uncommit_memory((char*)_aux_bitmap_region.start(), _aux_bitmap_region.byte_size());
-    if (!success) {
-      log_warning(gc)("Auxiliary marking bitmap uncommit failed: " PTR_FORMAT " (%zu bytes)",
-                      p2i(_aux_bitmap_region.start()), _aux_bitmap_region.byte_size());
-      assert(false, "Auxiliary marking bitmap uncommit should always succeed");
-    }
+    os::uncommit_memory((char*)_aux_bitmap_region.start(), _aux_bitmap_region.byte_size());
   }
 }
 
@@ -2626,11 +2621,7 @@ void ShenandoahHeap::uncommit_bitmap_slice(ShenandoahHeapRegion *r) {
   size_t len = _bitmap_bytes_per_slice;
 
   char* addr = (char*) _bitmap_region.start() + off;
-  bool success = os::uncommit_memory(addr, len);
-  if (!success) {
-    log_warning(gc)("Bitmap slice uncommit failed: " PTR_FORMAT " (%zu bytes)", p2i(addr), len);
-    assert(false, "Bitmap slice uncommit should always succeed");
-  }
+  os::uncommit_memory(addr, len);
 }
 
 void ShenandoahHeap::forbid_uncommit() {
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp b/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp
index b0c13df6c4f..afc6b24e168 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp
@@ -816,11 +816,7 @@ void ShenandoahHeapRegion::do_commit() {
 void ShenandoahHeapRegion::do_uncommit() {
   ShenandoahHeap* heap = ShenandoahHeap::heap();
   if (!heap->is_heap_region_special()) {
-    bool success = os::uncommit_memory((char *) bottom(), RegionSizeBytes);
-    if (!success) {
-      log_warning(gc)("Region uncommit failed: " PTR_FORMAT " (%zu bytes)", p2i(bottom()), RegionSizeBytes);
-      assert(false, "Region uncommit should always succeed");
-    }
+    os::uncommit_memory((char *) bottom(), RegionSizeBytes);
   }
   if (!heap->is_bitmap_region_special()) {
     heap->uncommit_bitmap_slice(this);
diff --git a/src/hotspot/share/memory/allocation.inline.hpp b/src/hotspot/share/memory/allocation.inline.hpp
index 5561cdbe6f7..1cbff9d0255 100644
--- a/src/hotspot/share/memory/allocation.inline.hpp
+++ b/src/hotspot/share/memory/allocation.inline.hpp
@@ -87,8 +87,7 @@ E* MmapArrayAllocator<E>::allocate(size_t length, MemTag mem_tag) {
 
 template <class E>
 void MmapArrayAllocator<E>::free(E* addr, size_t length) {
-  bool result = os::release_memory((char*)addr, size_for(length));
-  assert(result, "Failed to release memory");
+  os::release_memory((char*)addr, size_for(length));
 }
 
 template <class E>
diff --git a/src/hotspot/share/memory/memoryReserver.cpp b/src/hotspot/share/memory/memoryReserver.cpp
index e8d1887f59f..59e8f30707d 100644
--- a/src/hotspot/share/memory/memoryReserver.cpp
+++ b/src/hotspot/share/memory/memoryReserver.cpp
@@ -99,9 +99,7 @@ static char* reserve_memory_inner(char* requested_address,
   }
 
   // Base not aligned, retry.
-  if (!os::release_memory(base, size)) {
-    fatal("os::release_memory failed");
-  }
+  os::release_memory(base, size);
 
   // Map using the requested alignment.
   return os::reserve_memory_aligned(size, alignment, mem_tag, exec);
@@ -231,13 +229,13 @@ ReservedSpace MemoryReserver::reserve(size_t size,
                  mem_tag);
 }
 
-bool MemoryReserver::release(const ReservedSpace& reserved) {
+void MemoryReserver::release(const ReservedSpace& reserved) {
   assert(reserved.is_reserved(), "Precondition");
 
   if (reserved.special()) {
-    return os::release_memory_special(reserved.base(), reserved.size());
+    os::release_memory_special(reserved.base(), reserved.size());
   } else {
-    return os::release_memory(reserved.base(), reserved.size());
+    os::release_memory(reserved.base(), reserved.size());
   }
 }
 
@@ -266,9 +264,7 @@ static char* map_memory_to_file(char* requested_address,
 
 
   // Base not aligned, retry.
-  if (!os::unmap_memory(base, size)) {
-    fatal("os::unmap_memory failed");
-  }
+  os::unmap_memory(base, size);
 
   // Map using the requested alignment.
   return os::map_memory_to_file_aligned(size, alignment, fd, mem_tag);
diff --git a/src/hotspot/share/memory/memoryReserver.hpp b/src/hotspot/share/memory/memoryReserver.hpp
index 9ef12650b55..d13d8d72512 100644
--- a/src/hotspot/share/memory/memoryReserver.hpp
+++ b/src/hotspot/share/memory/memoryReserver.hpp
@@ -70,7 +70,7 @@ public:
                                MemTag mem_tag);
 
   // Release reserved memory
-  static bool release(const ReservedSpace& reserved);
+  static void release(const ReservedSpace& reserved);
 };
 
 class CodeMemoryReserver : AllStatic {
diff --git a/src/hotspot/share/memory/metaspace/virtualSpaceNode.cpp b/src/hotspot/share/memory/metaspace/virtualSpaceNode.cpp
index d21c6546cf5..df4e507b104 100644
--- a/src/hotspot/share/memory/metaspace/virtualSpaceNode.cpp
+++ b/src/hotspot/share/memory/metaspace/virtualSpaceNode.cpp
@@ -190,10 +190,7 @@ void VirtualSpaceNode::uncommit_range(MetaWord* p, size_t word_size) {
   }
 
   // Uncommit...
-  if (os::uncommit_memory((char*)p, word_size * BytesPerWord) == false) {
-    // Note: this can actually happen, since uncommit may increase the number of mappings.
-    fatal("Failed to uncommit metaspace.");
-  }
+  os::uncommit_memory((char*)p, word_size * BytesPerWord);
 
   ASAN_POISON_MEMORY_REGION((char*)p, word_size * BytesPerWord);
 
diff --git a/src/hotspot/share/memory/virtualspace.cpp b/src/hotspot/share/memory/virtualspace.cpp
index 92a168248d2..0627c0b9a8e 100644
--- a/src/hotspot/share/memory/virtualspace.cpp
+++ b/src/hotspot/share/memory/virtualspace.cpp
@@ -370,34 +370,22 @@ void VirtualSpace::shrink_by(size_t size) {
     assert(middle_high_boundary() <= aligned_upper_new_high &&
            aligned_upper_new_high + upper_needs <= upper_high_boundary(),
            "must not shrink beyond region");
-    if (!os::uncommit_memory(aligned_upper_new_high, upper_needs, _executable)) {
-      DEBUG_ONLY(warning("os::uncommit_memory failed"));
-      return;
-    } else {
-      _upper_high -= upper_needs;
-    }
+    os::uncommit_memory(aligned_upper_new_high, upper_needs, _executable);
+    _upper_high -= upper_needs;
   }
   if (middle_needs > 0) {
     assert(lower_high_boundary() <= aligned_middle_new_high &&
            aligned_middle_new_high + middle_needs <= middle_high_boundary(),
            "must not shrink beyond region");
-    if (!os::uncommit_memory(aligned_middle_new_high, middle_needs, _executable)) {
-      DEBUG_ONLY(warning("os::uncommit_memory failed"));
-      return;
-    } else {
-      _middle_high -= middle_needs;
-    }
+    os::uncommit_memory(aligned_middle_new_high, middle_needs, _executable);
+    _middle_high -= middle_needs;
   }
   if (lower_needs > 0) {
     assert(low_boundary() <= aligned_lower_new_high &&
            aligned_lower_new_high + lower_needs <= lower_high_boundary(),
            "must not shrink beyond region");
-    if (!os::uncommit_memory(aligned_lower_new_high, lower_needs, _executable)) {
-      DEBUG_ONLY(warning("os::uncommit_memory failed"));
-      return;
-    } else {
-      _lower_high -= lower_needs;
-    }
+    os::uncommit_memory(aligned_lower_new_high, lower_needs, _executable);
+    _lower_high -= lower_needs;
   }
 
   _high -= size;
diff --git a/src/hotspot/share/runtime/os.cpp b/src/hotspot/share/runtime/os.cpp
index 3a5a5745095..58774e59a34 100644
--- a/src/hotspot/share/runtime/os.cpp
+++ b/src/hotspot/share/runtime/os.cpp
@@ -2293,7 +2293,7 @@ void os::commit_memory_or_exit(char* addr, size_t size, size_t alignment_hint,
 // We do not have the same lock protection for pd_commit_memory and record_virtual_memory_commit.
 // We assume that there is some external synchronization that prevents a region from being uncommitted
 // before it is finished being committed.
-bool os::uncommit_memory(char* addr, size_t bytes, bool executable) {
+void os::uncommit_memory(char* addr, size_t bytes, bool executable) {
   assert_nonempty_range(addr, bytes);
   bool res;
   if (MemTracker::enabled()) {
@@ -2306,13 +2306,10 @@ bool os::uncommit_memory(char* addr, size_t bytes, bool executable) {
     res = pd_uncommit_memory(addr, bytes, executable);
   }
 
-  if (res) {
-    log_debug(os, map)("Uncommitted " RANGEFMT, RANGEFMTARGS(addr, bytes));
-  } else {
-    log_info(os, map)("Failed to uncommit " RANGEFMT, RANGEFMTARGS(addr, bytes));
+  if (!res) {
+    fatal("Failed to uncommit " RANGEFMT, RANGEFMTARGS(addr, bytes));
   }
-
-  return res;
+  log_debug(os, map)("Uncommitted " RANGEFMT, RANGEFMTARGS(addr, bytes));
 }
 
 // The scope of NmtVirtualMemoryLocker covers both pd_release_memory and record_virtual_memory_release because
@@ -2320,7 +2317,7 @@ bool os::uncommit_memory(char* addr, size_t bytes, bool executable) {
 // We do not have the same lock protection for pd_reserve_memory and record_virtual_memory_reserve.
 // We assume that there is some external synchronization that prevents a region from being released
 // before it is finished being reserved.
-bool os::release_memory(char* addr, size_t bytes) {
+void os::release_memory(char* addr, size_t bytes) {
   assert_nonempty_range(addr, bytes);
   bool res;
   if (MemTracker::enabled()) {
@@ -2333,11 +2330,9 @@ bool os::release_memory(char* addr, size_t bytes) {
     res = pd_release_memory(addr, bytes);
   }
   if (!res) {
-    log_info(os, map)("Failed to release " RANGEFMT, RANGEFMTARGS(addr, bytes));
-  } else {
-    log_debug(os, map)("Released " RANGEFMT, RANGEFMTARGS(addr, bytes));
+    fatal("Failed to release " RANGEFMT, RANGEFMTARGS(addr, bytes));
   }
-  return res;
+  log_debug(os, map)("Released " RANGEFMT, RANGEFMTARGS(addr, bytes));
 }
 
 // Prints all mappings
@@ -2406,7 +2401,7 @@ char* os::map_memory(int fd, const char* file_name, size_t file_offset,
   return result;
 }
 
-bool os::unmap_memory(char *addr, size_t bytes) {
+void os::unmap_memory(char *addr, size_t bytes) {
   bool result;
   if (MemTracker::enabled()) {
     MemTracker::NmtVirtualMemoryLocker nvml;
@@ -2417,7 +2412,9 @@ bool os::unmap_memory(char *addr, size_t bytes) {
   } else {
     result = pd_unmap_memory(addr, bytes);
   }
-  return result;
+  if (!result) {
+    fatal("Failed to unmap memory " RANGEFMT, RANGEFMTARGS(addr, bytes));
+  }
 }
 
 void os::disclaim_memory(char *addr, size_t bytes) {
@@ -2445,7 +2442,7 @@ char* os::reserve_memory_special(size_t size, size_t alignment, size_t page_size
   return result;
 }
 
-bool os::release_memory_special(char* addr, size_t bytes) {
+void os::release_memory_special(char* addr, size_t bytes) {
   bool res;
   if (MemTracker::enabled()) {
     MemTracker::NmtVirtualMemoryLocker nvml;
@@ -2456,7 +2453,9 @@ bool os::release_memory_special(char* addr, size_t bytes) {
   } else {
     res = pd_release_memory_special(addr, bytes);
   }
-  return res;
+  if (!res) {
+    fatal("Failed to release memory special " RANGEFMT, RANGEFMTARGS(addr, bytes));
+  }
 }
 
 // Convenience wrapper around naked_short_sleep to allow for longer sleep
diff --git a/src/hotspot/share/runtime/os.hpp b/src/hotspot/share/runtime/os.hpp
index c6a1d670926..e773b40cb14 100644
--- a/src/hotspot/share/runtime/os.hpp
+++ b/src/hotspot/share/runtime/os.hpp
@@ -536,8 +536,8 @@ class os: AllStatic {
   static void   commit_memory_or_exit(char* addr, size_t size,
                                       size_t alignment_hint,
                                       bool executable, const char* mesg);
-  static bool   uncommit_memory(char* addr, size_t bytes, bool executable = false);
-  static bool   release_memory(char* addr, size_t bytes);
+  static void   uncommit_memory(char* addr, size_t bytes, bool executable = false);
+  static void   release_memory(char* addr, size_t bytes);
 
   // Does the platform support trimming the native heap?
   static bool can_trim_native_heap();
@@ -566,7 +566,7 @@ class os: AllStatic {
   static bool   unguard_memory(char* addr, size_t bytes);
   static bool   create_stack_guard_pages(char* addr, size_t bytes);
   static bool   pd_create_stack_guard_pages(char* addr, size_t bytes);
-  static bool   remove_stack_guard_pages(char* addr, size_t bytes);
+  static void   remove_stack_guard_pages(char* addr, size_t bytes);
   // Helper function to create a new file with template jvmheap.XXXXXX.
   // Returns a valid fd on success or else returns -1
   static int create_file_for_heap(const char* dir);
@@ -582,7 +582,7 @@ class os: AllStatic {
   static char*  map_memory(int fd, const char* file_name, size_t file_offset,
                            char *addr, size_t bytes, MemTag mem_tag, bool read_only = false,
                            bool allow_exec = false);
-  static bool   unmap_memory(char *addr, size_t bytes);
+  static void   unmap_memory(char *addr, size_t bytes);
   static void   disclaim_memory(char *addr, size_t bytes);
   static void   realign_memory(char *addr, size_t bytes, size_t alignment_hint);
 
@@ -605,7 +605,7 @@ class os: AllStatic {
   // reserve, commit and pin the entire memory region
   static char*  reserve_memory_special(size_t size, size_t alignment, size_t page_size,
                                        char* addr, bool executable);
-  static bool   release_memory_special(char* addr, size_t bytes);
+  static void   release_memory_special(char* addr, size_t bytes);
   static void   large_page_init();
   static size_t large_page_size();
   static bool   can_commit_large_page_memory();
diff --git a/src/hotspot/share/runtime/stackOverflow.cpp b/src/hotspot/share/runtime/stackOverflow.cpp
index e2bd157c555..61dbce8c5b4 100644
--- a/src/hotspot/share/runtime/stackOverflow.cpp
+++ b/src/hotspot/share/runtime/stackOverflow.cpp
@@ -116,13 +116,8 @@ void StackOverflow::remove_stack_guard_pages() {
   size_t len = stack_guard_zone_size();
 
   if (os::must_commit_stack_guard_pages()) {
-    if (os::remove_stack_guard_pages((char *) low_addr, len)) {
-      _stack_guard_state = stack_guard_unused;
-    } else {
-      log_warning(os, thread)("Attempt to deallocate stack guard pages failed ("
-        PTR_FORMAT "-" PTR_FORMAT ").", p2i(low_addr), p2i(low_addr + len));
-      return;
-    }
+    os::remove_stack_guard_pages((char *) low_addr, len);
+    _stack_guard_state = stack_guard_unused;
   } else {
     if (_stack_guard_state == stack_guard_unused) return;
     if (os::unguard_memory((char *) low_addr, len)) {
diff --git a/test/hotspot/gtest/gc/z/test_zVirtualMemoryManager.cpp b/test/hotspot/gtest/gc/z/test_zVirtualMemoryManager.cpp
index 7c41dde04cb..f2a62fea57d 100644
--- a/test/hotspot/gtest/gc/z/test_zVirtualMemoryManager.cpp
+++ b/test/hotspot/gtest/gc/z/test_zVirtualMemoryManager.cpp
@@ -168,8 +168,7 @@ public:
     ASSERT_EQ(vmem, ZVirtualMemory(base_offset + 2 * ZGranuleSize, ZGranuleSize));
     _reserver->unreserve(vmem);
 
-    const bool released = os::release_memory((char*)untype(blocked), ZGranuleSize);
-    ASSERT_TRUE(released);
+    os::release_memory((char*)untype(blocked), ZGranuleSize);
   }
 
   void test_remove_from_low() {
diff --git a/test/hotspot/gtest/memory/test_virtualspace.cpp b/test/hotspot/gtest/memory/test_virtualspace.cpp
index d2f8927ba28..70f442c5802 100644
--- a/test/hotspot/gtest/memory/test_virtualspace.cpp
+++ b/test/hotspot/gtest/memory/test_virtualspace.cpp
@@ -34,7 +34,7 @@ namespace {
    public:
     MemoryReleaser(ReservedSpace* rs) : _rs(rs) { }
     ~MemoryReleaser() {
-      EXPECT_TRUE(MemoryReserver::release(*_rs));
+      MemoryReserver::release(*_rs);
     }
   };
 
@@ -355,9 +355,9 @@ class TestReservedSpace : AllStatic {
 
   static void release_memory_for_test(ReservedSpace rs) {
     if (rs.special()) {
-      EXPECT_TRUE(os::release_memory_special(rs.base(), rs.size()));
+      os::release_memory_special(rs.base(), rs.size());
     } else {
-      EXPECT_TRUE(os::release_memory(rs.base(), rs.size()));
+      os::release_memory(rs.base(), rs.size());
     }
   }
 
diff --git a/test/hotspot/gtest/runtime/test_os.cpp b/test/hotspot/gtest/runtime/test_os.cpp
index aee7b51e2b3..7f90a21884b 100644
--- a/test/hotspot/gtest/runtime/test_os.cpp
+++ b/test/hotspot/gtest/runtime/test_os.cpp
@@ -511,7 +511,7 @@ static inline bool can_reserve_executable_memory(void) {
 static void carefully_release_multiple(address start, int num_stripes, size_t stripe_len) {
   for (int stripe = 0; stripe < num_stripes; stripe++) {
     address q = start + (stripe * stripe_len);
-    EXPECT_TRUE(os::release_memory((char*)q, stripe_len));
+    os::release_memory((char*)q, stripe_len);
   }
 }
 
@@ -534,7 +534,7 @@ static address reserve_multiple(int num_stripes, size_t stripe_len) {
     p = (address)os::reserve_memory(total_range_len, mtTest);
     EXPECT_NE(p, (address)nullptr);
     // .. release it...
-    EXPECT_TRUE(os::release_memory((char*)p, total_range_len));
+    os::release_memory((char*)p, total_range_len);
     // ... re-reserve in the same spot multiple areas...
     for (int stripe = 0; stripe < num_stripes; stripe++) {
       address q = p + (stripe * stripe_len);
@@ -627,7 +627,7 @@ TEST_VM(os, release_multi_mappings) {
     // On Windows, temporarily switch on UseNUMAInterleaving to allow release_memory to release
     //  multiple mappings in one go (otherwise we assert, which we test too, see death test below).
     WINDOWS_ONLY(NUMASwitcher b(true);)
-    ASSERT_TRUE(os::release_memory((char*)p_middle_stripes, middle_stripe_len));
+    os::release_memory((char*)p_middle_stripes, middle_stripe_len);
   }
   PRINT_MAPPINGS("B");
 
@@ -641,7 +641,7 @@ TEST_VM(os, release_multi_mappings) {
   // Clean up. Release all mappings.
   {
     WINDOWS_ONLY(NUMASwitcher b(true);) // allow release_memory to release multiple regions
-    ASSERT_TRUE(os::release_memory((char*)p, total_range_len));
+    os::release_memory((char*)p, total_range_len);
   }
 }
 #endif // !AIX
@@ -650,29 +650,54 @@ TEST_VM(os, release_multi_mappings) {
 // On Windows, test that we recognize bad ranges.
 //  On debug this would assert. Test that too.
 //  On other platforms, we are unable to recognize bad ranges.
-#ifdef ASSERT
-TEST_VM_ASSERT_MSG(os, release_bad_ranges, ".*bad release") {
-#else
-TEST_VM(os, release_bad_ranges) {
-#endif
-  char* p = os::reserve_memory(4 * M, mtTest);
-  ASSERT_NE(p, (char*)nullptr);
-  // Release part of range
-  ASSERT_FALSE(os::release_memory(p, M));
-  // Release part of range
-  ASSERT_FALSE(os::release_memory(p + M, M));
-  // Release more than the range (explicitly switch off NUMA here
-  //  to make os::release_memory() test more strictly and to not
-  //  accidentally release neighbors)
-  {
-    NUMASwitcher b(false);
-    ASSERT_FALSE(os::release_memory(p, M * 5));
-    ASSERT_FALSE(os::release_memory(p - M, M * 5));
-    ASSERT_FALSE(os::release_memory(p - M, M * 6));
-  }
 
-  ASSERT_TRUE(os::release_memory(p, 4 * M)); // Release for real
-  ASSERT_FALSE(os::release_memory(p, 4 * M)); // Again, should fail
+#ifdef ASSERT
+#define TEST_RELEASE_RANGE_ERROR(name) TEST_VM_ASSERT_MSG(os, name, ".*bad release")
+#else
+#define TEST_RELEASE_RANGE_ERROR(name) TEST_VM_FATAL_ERROR_MSG(os, name, ".*Failed to release.*")
+#endif
+
+static char* setup_release_test_memory() {
+  char* p = os::reserve_memory(4 * M, mtTest);
+  EXPECT_NE(p, (char*)nullptr);
+  return p;
+}
+
+TEST_RELEASE_RANGE_ERROR(release_bad_range_start) {
+  char* p = setup_release_test_memory();
+  os::release_memory(p, M);  // Release part of the range
+}
+
+TEST_RELEASE_RANGE_ERROR(release_bad_range_middle) {
+  char* p = setup_release_test_memory();
+  os::release_memory(p + M, M);  // Release middle part
+}
+
+// Release more than the range (explicitly switch off NUMA here
+//  to make os::release_memory() test more strict and to not
+//  accidentally release neighbors)
+TEST_RELEASE_RANGE_ERROR(release_beyond_range1) {
+  char* p = setup_release_test_memory();
+  NUMASwitcher b(false);
+  os::release_memory(p, M * 5);
+}
+
+TEST_RELEASE_RANGE_ERROR(release_beyond_range2) {
+  char* p = setup_release_test_memory();
+  NUMASwitcher b(false);
+  os::release_memory(p - M, M * 5);
+}
+
+TEST_RELEASE_RANGE_ERROR(release_beyond_range3) {
+  char* p = setup_release_test_memory();
+  NUMASwitcher b(false);
+  os::release_memory(p - M, M * 6);
+}
+
+TEST_RELEASE_RANGE_ERROR(release_already_released) {
+  char* p = setup_release_test_memory();
+  os::release_memory(p, 4 * M); // Release for real
+  os::release_memory(p, 4 * M); // Again, should fail
 }
 #endif // _WIN32
 
@@ -695,11 +720,11 @@ TEST_VM(os, release_one_mapping_multi_commits) {
 
   ASSERT_TRUE(p2 == nullptr || p2 == border);
 
-  ASSERT_TRUE(os::release_memory((char*)p, total_range_len));
+  os::release_memory((char*)p, total_range_len);
   PRINT_MAPPINGS("C");
 
   if (p2 != nullptr) {
-    ASSERT_TRUE(os::release_memory((char*)p2, stripe_len));
+    os::release_memory((char*)p2, stripe_len);
     PRINT_MAPPINGS("D");
   }
 }
@@ -772,7 +797,7 @@ TEST_VM(os, find_mapping_simple) {
     if (os::win32::find_mapping(p + total_range_len, &mapping_info)) {
       ASSERT_NE(mapping_info.base, p);
     }
-    ASSERT_TRUE(os::release_memory((char*)p, total_range_len));
+    os::release_memory((char*)p, total_range_len);
     PRINT_MAPPINGS("B");
     ASSERT_FALSE(os::win32::find_mapping(p, &mapping_info));
   }
@@ -801,7 +826,7 @@ TEST_VM(os, find_mapping_2) {
   if (os::win32::find_mapping(p + total_range_len, &mapping_info)) {
     ASSERT_NE(mapping_info.base, p);
   }
-  ASSERT_TRUE(os::release_memory((char*)p, total_range_len));
+  os::release_memory((char*)p, total_range_len);
   PRINT_MAPPINGS("B");
   ASSERT_FALSE(os::win32::find_mapping(p, &mapping_info));
 }
@@ -1132,11 +1157,11 @@ TEST_VM(os, commit_memory_or_exit) {
   ASSERT_NOT_NULL(base);
   os::commit_memory_or_exit(base, size, false, "Commit failed.");
   strcpy(base, letters);
-  ASSERT_TRUE(os::uncommit_memory(base, size, false));
+  os::uncommit_memory(base, size, false);
   os::commit_memory_or_exit(base, size, page_sz, false, "Commit with alignment hint failed.");
   strcpy(base, letters);
-  ASSERT_TRUE(os::uncommit_memory(base, size, false));
-  EXPECT_TRUE(os::release_memory(base, size));
+  os::uncommit_memory(base, size, false);
+  os::release_memory(base, size);
 }
 
 #if !defined(_AIX)
@@ -1152,7 +1177,7 @@ TEST_VM(os, map_memory_to_file) {
   char* result = os::map_memory_to_file(size, fd, mtTest);
   ASSERT_NOT_NULL(result);
   EXPECT_EQ(strcmp(letters, result), 0);
-  EXPECT_TRUE(os::unmap_memory(result, size));
+  os::unmap_memory(result, size);
   ::close(fd);
 }
 
@@ -1169,7 +1194,7 @@ TEST_VM(os, map_unmap_memory) {
   char* result = os::map_memory(fd, path, 0, nullptr, size, mtTest, true, false);
   ASSERT_NOT_NULL(result);
   EXPECT_EQ(strcmp(letters, result), 0);
-  EXPECT_TRUE(os::unmap_memory(result, size));
+  os::unmap_memory(result, size);
   ::close(fd);
 }
 
@@ -1184,7 +1209,7 @@ TEST_VM(os, map_memory_to_file_aligned) {
   char* result = os::map_memory_to_file_aligned(os::vm_allocation_granularity(), os::vm_allocation_granularity(), fd, mtTest);
   ASSERT_NOT_NULL(result);
   EXPECT_EQ(strcmp(letters, result), 0);
-  EXPECT_TRUE(os::unmap_memory(result, os::vm_allocation_granularity()));
+  os::unmap_memory(result, os::vm_allocation_granularity());
   ::close(fd);
 }
 
diff --git a/test/hotspot/gtest/runtime/test_os_linux.cpp b/test/hotspot/gtest/runtime/test_os_linux.cpp
index c8467784b0a..337365592dc 100644
--- a/test/hotspot/gtest/runtime/test_os_linux.cpp
+++ b/test/hotspot/gtest/runtime/test_os_linux.cpp
@@ -379,8 +379,8 @@ TEST_VM(os_linux, pretouch_thp_and_use_concurrent) {
   for (int i = 0; i < 1000; i++)
     EXPECT_EQ(*iptr++, i);
 
-  EXPECT_TRUE(os::uncommit_memory(heap, size, false));
-  EXPECT_TRUE(os::release_memory(heap, size));
+  os::uncommit_memory(heap, size, false);
+  os::release_memory(heap, size);
   UseTransparentHugePages = useThp;
 }
 
diff --git a/test/hotspot/jtreg/runtime/os/TestMemoryAllocationLogging.java b/test/hotspot/jtreg/runtime/os/TestMemoryAllocationLogging.java
index 9f4f4baeead..60f6d29f16d 100644
--- a/test/hotspot/jtreg/runtime/os/TestMemoryAllocationLogging.java
+++ b/test/hotspot/jtreg/runtime/os/TestMemoryAllocationLogging.java
@@ -157,7 +157,7 @@ public class TestMemoryAllocationLogging {
                 expectedLogs = new String[] {
                         /* Debug level log */
                         String.format("Reserved \\[0x.* - 0x.*\\), \\(%d bytes\\)", PAGE_SIZE),
-                        "Failed to uncommit \\[0x.* - 0x.*\\), \\(.* bytes\\)",
+                        "fatal error: Failed to uncommit \\[0x.* - 0x.*\\), \\(.* bytes\\).*",
                         /* Trace level log */
                         "mmap failed: \\[0x.* - 0x.*\\), \\(.* bytes\\) errno=\\(Invalid argument\\)"
                 };