sandbox: vm: add cache allocator, generic size-N caches for kmalloc()

sandbox/base/memory_test.c

@@ -174,9 +174,6 @@ int memory_test(void)
 		print_free_pages(&pg_data->pg_zones[i]);
 	}
 
-	printf("all pages:\n");
-	print_all_pages();
-
 	vm_page_t *pg = vm_page_alloc(VM_PAGE_128K, 0);
 	printf("allocated 128K at 0x%lx\n", vm_page_get_paddr(pg));
 
@@ -242,6 +239,9 @@ int memory_test(void)
 		}
 	}
 
+	void *p = kmalloc(32, 0);
+	printf("allocated 32 bytes at %p\n", p);
+	
 	munmap(system_memory, MB_TO_BYTES(MEMORY_SIZE_MB));
 	return 0;
 }