TTU_BATCH_FLUSH
TTU_BATCH_FLUSH;
TTU_IGNORE_MLOCK | TTU_BATCH_FLUSH);
try_to_migrate(src, mode == MIGRATE_ASYNC ? TTU_BATCH_FLUSH : 0);
TTU_SYNC | TTU_BATCH_FLUSH)))
if (!(flags & TTU_BATCH_FLUSH))
enum ttu_flags flags = TTU_BATCH_FLUSH;