From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from magic.merlins.org ([209.81.13.136]:41015 "EHLO mail1.merlins.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750995AbaEWXNm (ORCPT ); Fri, 23 May 2014 19:13:42 -0400 Date: Fri, 23 May 2014 16:13:37 -0700 From: Marc MERLIN To: Chris Mason Cc: Duncan <1i5t5.duncan@cox.net>, linux-btrfs@vger.kernel.org, takeuchi_satoru@jp.fujitsu.com Subject: Re: 3.15.0-rc5: now sync and mount are hung on call_rwsem_down_write_failed Message-ID: <20140523231337.GC12384@merlins.org> References: <20140522090921.GA12037@merlins.org> <20140522131528.GB22952@merlins.org> <20140523002243.GE12312@merlins.org> <20140523141722.GA11991@merlins.org> <537FAE91.20308@fb.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <537FAE91.20308@fb.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Fri, May 23, 2014 at 04:24:49PM -0400, Chris Mason wrote: > > I was able to kill btrfs send and receive, but mencoder is very hung, and > > sync does not finish either: > > 10654 merlin sync sync_inodes_sb > > 17191 merlin sync call_rwsem_down_read_failed > > > > I'm not posting the sysrq-w every time, but I have it available if needed. > > Hi Marc, > > Can I have the sysrq-w from this one if it's still available? Argh, just found out that the bug caused none of the 2 copies to ever be committed to disk (including an ext4 partition), and the remote syslog lost too much for it to be useful. What's more weird is the previous one, where I was able to copy the syslog data that never got committed to disk but was still in the page cache to another machine, I just realized that this one is missing the beginning (it starts at cpu #4). So it looks like the only complete one I have right now is http://marc.merlins.org/tmp/btrfs-hang.txt If you need more, please let me know, and I'll make sure that I save that very carefully next time. Thanks, Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ | PGP 1024R/763BE901