From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id 23B207CA1 for ; Thu, 24 Mar 2016 03:15:32 -0500 (CDT) Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by relay2.corp.sgi.com (Postfix) with ESMTP id E73883040FE for ; Thu, 24 Mar 2016 01:15:31 -0700 (PDT) Received: from mail-ph.de-nserver.de (mail-ph.de-nserver.de [85.158.179.214]) by cuda.sgi.com with ESMTP id sqp7Ah0KzmftSBny (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Thu, 24 Mar 2016 01:15:17 -0700 (PDT) Subject: Re: xfs trace in 4.4.2 / also in 4.3.3 WARNING fs/xfs/xfs_aops.c:1232 xfs_vm_releasepage References: <56C81D94.7090603@profihost.ag> <20160220144533.GA36182@bfoster.bfoster> <56D9D834.2000303@profihost.ag> <20160304191329.GC3758@bfoster.bfoster> <56D9E9BE.40101@profihost.ag> <20160304210341.GA8035@bfoster.bfoster> <20160305224845.GR30721@dastard> <56F299E3.4020703@profihost.ag> <20160323140736.GD43073@bfoster.bfoster> <56F3A101.1020300@profihost.ag> From: Stefan Priebe - Profihost AG Message-ID: <56F3A213.2020908@profihost.ag> Date: Thu, 24 Mar 2016 09:15:15 +0100 MIME-Version: 1.0 In-Reply-To: <56F3A101.1020300@profihost.ag> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: Brian Foster Cc: linux-fsdevel@vger.kernel.org, "xfs-masters@oss.sgi.com" , "xfs@oss.sgi.com" Am 24.03.2016 um 09:10 schrieb Stefan Priebe - Profihost AG: > > Am 23.03.2016 um 15:07 schrieb Brian Foster: >> On Wed, Mar 23, 2016 at 02:28:03PM +0100, Stefan Priebe - Profihost AG wrote: >>> sorry new one the last one got mangled. Comments inside. >>> >>> Am 05.03.2016 um 23:48 schrieb Dave Chinner: >>>> On Fri, Mar 04, 2016 at 04:03:42PM -0500, Brian Foster wrote: >>>>> On Fri, Mar 04, 2016 at 09:02:06PM +0100, Stefan Priebe wrote: >>>>>> Am 04.03.2016 um 20:13 schrieb Brian Foster: >>>>>>> On Fri, Mar 04, 2016 at 07:47:16PM +0100, Stefan Priebe wrote: >>>>>>>> Am 20.02.2016 um 19:02 schrieb Stefan Priebe - Profihost AG: >>>>>>>>> >>>>>>>>>> Am 20.02.2016 um 15:45 schrieb Brian Foster : >>>>>>>>>> >>>>>>>>>>> On Sat, Feb 20, 2016 at 09:02:28AM +0100, Stefan Priebe wrote: >> ... >>> >>> This has happened again on 8 different hosts in the last 24 hours >>> running 4.4.6. >>> >>> All of those are KVM / Qemu hosts and are doing NO I/O except the normal >>> OS stuff as the VMs have remote storage. So no database, no rsync on >>> those hosts - just the OS doing nearly nothing. >>> >>> All those show: >>> [153360.287040] WARNING: CPU: 0 PID: 109 at fs/xfs/xfs_aops.c:1234 >>> xfs_vm_releasepage+0xe2/0xf0() >>> >> >> Ok, well at this point the warning isn't telling us anything beyond >> you're reproducing the problem. We can't really make progress without >> more information. We don't necessarily know what application or >> operations caused this by the time it occurs, but perhaps knowing what >> file is affected could give us a hint. >> >> We have the xfs_releasepage tracepoint, but that's unconditional and so >> might generate a lot of noise by default. Could you enable the >> xfs_releasepage tracepoint and hunt for instances where delalloc != 0? >> E.g., we could leave a long running 'trace-cmd record -e >> "xfs:xfs_releasepage" ' command on several boxes and wait for the >> problem to occur. Alternatively (and maybe easier), run 'trace-cmd start >> -e "xfs:xfs_releasepage"' and leave something like 'cat >> /sys/kernel/debug/tracing/trace_pipe | grep -v "delalloc 0" > >> ~/trace.out' running to capture instances. Isn't the trace a WARN_ONCE? So it does not reoccur or can i check the it in the trace.out even the WARN_ONCE was already triggered? Stefan > > Stefan > >> >> Brian >> >>> Stefan >>> >>>> >>>> -Dave. >>>> >>> >>> _______________________________________________ >>> xfs mailing list >>> xfs@oss.sgi.com >>> http://oss.sgi.com/mailman/listinfo/xfs _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs