On Mon, Feb 10, 2020 at 04:19:58PM -0800, Minchan Kim wrote:> filemap_fault> find a page form page(PG_uptodate|PG_readahead|PG_writeback)Uh ... That shouldn't be possible. /* * Same bit is used for PG_readahead and PG_reclaim. */ if (PageWriteback(page)) return; ClearPageReadahead(page);