LibC: free() should move kept empty ChunkedBlocks to the end of the list.

This ensures that we continue allocating from partially-used blocks until
they are full.

1 files changed, 7 insertions, 0 deletions

diff --git a/LibC/malloc.cpp b/LibC/malloc.cpp
index b7204d0d8f..38feddd216 100644
--- a/LibC/malloc.cpp
+++ b/LibC/malloc.cpp
@@ -204,6 +204,13 @@ void free(void* ptr)
 #ifdef MALLOC_DEBUG
             dbgprintf("Keeping block %p around for size class %u\n", block, good_size);
 #endif
+            if (allocator->blocks.tail() != block) {
+#ifdef MALLOC_DEBUG
+                dbgprintf("Moving block %p to tail of list for size class %u\n", block, good_size);
+#endif
+                allocator->blocks.remove(block);
+                allocator->blocks.append(block);
+            }
             return;
         }
 #ifdef MALLOC_DEBUG