From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S945930AbdDTNcy (ORCPT ); Thu, 20 Apr 2017 09:32:54 -0400 Received: from mail-wm0-f65.google.com ([74.125.82.65]:33884 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S943537AbdDTNct (ORCPT ); Thu, 20 Apr 2017 09:32:49 -0400 Date: Thu, 20 Apr 2017 15:29:20 +0200 From: Miklos Szeredi To: Antonio SJ Musumeci Cc: fuse-devel , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [fuse-devel] trying to steal weird page? Message-ID: <20170420132920.GA5214@veci.piliscsaba.szeredi.hu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.7.1 (2016-10-04) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 12, 2017 at 11:30:00AM -0400, Antonio SJ Musumeci wrote: > A user reported getting the below errors when *not* using direct_io > but atomic_o_trunc, auto_cache, big_writes, default_permissions, > splice_move, splice_read, and splice_write are enabled. > > Any ideas? I think this is due to the PageWaiters bit added in v4.10 by 62906027091f ("mm: add PageWaiters indicating tasks are waiting for a page bit") That bit is harmless and probably left behind due to a race. Following patch should fix the warning. Thanks, Miklos --- fs/fuse/dev.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -811,6 +811,7 @@ static int fuse_check_page(struct page * 1 << PG_uptodate | 1 << PG_lru | 1 << PG_active | + 1 << PG_waiters | 1 << PG_reclaim))) { printk(KERN_WARNING "fuse: trying to steal weird page\n"); printk(KERN_WARNING " page=%p index=%li flags=%08lx, count=%i, mapcount=%i, mapping=%p\n", page, page->index, page->flags, page_count(page), page_mapcount(page), page->mapping);