From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc Lehmann Subject: Re: sync/umount hang on 3.18.21, 1.4TB gone after crash Date: Fri, 25 Sep 2015 08:01:21 +0200 Message-ID: <20150925060121.GD486@schmorp.de> References: <20150923215850.GC2360@schmorp.de> <20150924185023.GE40291@jaegeuk-mac02> <20150925060018.GC486@schmorp.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1ZfM4X-0006TX-Lf for linux-f2fs-devel@lists.sourceforge.net; Fri, 25 Sep 2015 06:01:29 +0000 Received: from mail.nethype.de ([5.9.56.24]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:AES128-SHA:128) (Exim 4.76) id 1ZfM4W-0002d3-0m for linux-f2fs-devel@lists.sourceforge.net; Fri, 25 Sep 2015 06:01:29 +0000 Content-Disposition: inline In-Reply-To: <20150925060018.GC486@schmorp.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: Jaegeuk Kim Cc: linux-f2fs-devel@lists.sourceforge.net On Fri, Sep 25, 2015 at 08:00:19AM +0200, Marc Lehmann wrote: > On Thu, Sep 24, 2015 at 11:50:23AM -0700, Jaegeuk Kim wrote: > > > When I came back after ~10 hours, I found a number of hung task messages > > > in syslog, and when I entered sync, sync was consuming 100% system time. > > > > Hmm, at this time, it would be good to check what process is stuck through > > sysrq. > > It was only intermittently, but here they are. I meant "here are backtraces from the stuck process", from syslog, not via sysrq of course. -- The choice of a Deliantra, the free code+content MORPG -----==- _GNU_ http://www.deliantra.net ----==-- _ generation ---==---(_)__ __ ____ __ Marc Lehmann --==---/ / _ \/ // /\ \/ / schmorp@schmorp.de -=====/_/_//_/\_,_/ /_/\_\ ------------------------------------------------------------------------------