From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752128AbcDWRKw (ORCPT ); Sat, 23 Apr 2016 13:10:52 -0400 Received: from michel.telenet-ops.be ([195.130.137.88]:53574 "EHLO michel.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751927AbcDWRKv (ORCPT ); Sat, 23 Apr 2016 13:10:51 -0400 Message-ID: <1461431448.8450.2.camel@telenet.be> Subject: Re: 3.5.0: BUG: Bad page state in process Compositor pfn:16834f From: Frederik Himpe To: Michal Hocko Cc: linux-kernel@vger.kernel.org Date: Sat, 23 Apr 2016 19:10:48 +0200 In-Reply-To: <20160416202931.GB15128@dhcp22.suse.cz> References: <20160416202931.GB15128@dhcp22.suse.cz> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.18.5.1-1 Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On za, 2016-04-16 at 16:29 -0400, Michal Hocko wrote: > On Sat 16-04-16 18:37:53, Frederik Himpe wrote: > > > >  > > Apr 16 20:21:53 piranha kernel: [27926.414148] BUG: Bad page state > > in process Compositor  pfn:16834f > > Apr 16 20:21:53 piranha kernel: [27926.414153] > > page:ffffea0005a0d3c0 count:0 mapcount:0 mapping:          (null) > > index:0x0 > > Apr 16 20:21:53 piranha kernel: [27926.414155] flags: > > 0x1ffff8000000000() > Flags look weird > > > > > Apr 16 20:21:53 piranha kernel: [27926.414156] page dumped because: > > page still charged to cgroup > > Apr 16 20:21:53 piranha kernel: [27926.414157] page- > > >mem_cgroup:4000000000000000 > And we think that the page is still charged because page->mem_cgroup > != > NULL. The value is not a pointer though. It seems like somebody is > corrupting the struct page. Hard to tell who that might be though > from > the available information. This will be nasty to track down I am > afraid. > How reproducible is it? I do not know how to reproduce this. I upgraded to 4.5.1, and with this kernel however I experienced already multiple hard freezes. I suspect they are the same problem, but there is nothing in the kernel logs. So 4.5 series is definitely unstable on this system. -- Frederik Himpe