Add shared constant for PAGE_SIZE.

2 files changed, 5 insertions, 2 deletions

diff --git a/vespalib/src/tests/datastore/array_store/array_store_test.cpp b/vespalib/src/tests/datastore/array_store/array_store_test.cpp
index d46df668df6..aa35fb24823 100644
--- a/vespalib/src/tests/datastore/array_store/array_store_test.cpp
+++ b/vespalib/src/tests/datastore/array_store/array_store_test.cpp
@@ -480,7 +480,8 @@ struct ByteStoreTest : public ArrayStoreTest<testing::Test, uint8_t> {
     ByteStoreTest() : ArrayStoreTest<testing::Test, uint8_t>(ByteStoreTest::ArrayStoreType::
                                               optimizedConfigForHugePage(1023,
                                                                          vespalib::alloc::MemoryAllocator::HUGEPAGE_SIZE,
-                                                                         4_Ki, 8_Ki, ALLOC_GROW_FACTOR)) {}
+                                                                         vespalib::alloc::MemoryAllocator::PAGE_SIZE,
+                                                                         8_Ki, ALLOC_GROW_FACTOR)) {}
 };
 
 TEST_F(ByteStoreTest, offset_in_EntryRefT_is_within_bounds_when_allocating_memory_buffers_where_wanted_number_of_bytes_is_not_a_power_of_2_and_less_than_huge_page_size)
diff --git a/vespalib/src/vespa/vespalib/util/memory_allocator.h b/vespalib/src/vespa/vespalib/util/memory_allocator.h
index 4f5374b0f11..2bcd7e5889d 100644
--- a/vespalib/src/vespa/vespalib/util/memory_allocator.h
+++ b/vespalib/src/vespa/vespalib/util/memory_allocator.h
@@ -2,6 +2,7 @@
 
 #pragma once
 
+#include <vespa/vespalib/util/size_literals.h>
 #include <utility>
 #include <cstddef>
 
@@ -12,7 +13,8 @@ namespace vespalib::alloc {
  */
 class MemoryAllocator {
 public:
-    static constexpr size_t HUGEPAGE_SIZE = 0x200000u;
+    static constexpr size_t PAGE_SIZE = 4_Ki;
+    static constexpr size_t HUGEPAGE_SIZE = 2_Mi;
     using PtrAndSize = std::pair<void *, size_t>;
     MemoryAllocator(const MemoryAllocator &) = delete;
     MemoryAllocator & operator = (const MemoryAllocator &) = delete;