On Mon, Nov 13, 2023 at 12:01:54PM -0500, Zi Yan wrote: > + /* this makes migrate_pages() split the source page and retry */ > + if (folio_order(src) > 0) > + return NULL; Nit: folio_test_large() is more efficient than folio_order() > 0. The former simply tests the bit, while the second tests the bit, then loads folio->_order to check it's >0. We know it will be, but there's no way to tell gcc that if the bit is set, this value is definitely not 0.
