From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:52862 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751778AbaE0TGx (ORCPT ); Tue, 27 May 2014 15:06:53 -0400 Message-ID: <5384E2FA.1070509@fb.com> Date: Tue, 27 May 2014 15:09:46 -0400 From: Chris Mason MIME-Version: 1.0 To: =?ISO-8859-1?Q?Torbj=F8rn?= , linux-btrfs Subject: Re: 3.15-rc6 - btrfs-transacti:4157 blocked for more than 120 seconds. References: <5384D53C.9070509@skagestad.org> In-Reply-To: <5384D53C.9070509@skagestad.org> Content-Type: text/plain; charset="ISO-8859-1" Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 05/27/2014 02:11 PM, Torbjørn wrote: > Hi, > > Btrfs-transaction keeps blocking for me on all 3.15-rc versions. > 3.14 does not have this issue. > The process never gets unstuck. btrfs fi sync does not help. A hard > reboot seems to be the only way to recover. > > The volume is still readable when it's in this state. > > dmesg + sysrq-w is available at > https://urldefense.proofpoint.com/v1/url?u=http://pastebin.com/vHQnRE2F&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=6%2FL0lzzDhu0Y1hL9xm%2BQyA%3D%3D%0A&m=IKSs%2F0C3x9a0LIiVKFmZVoP9lSAZ%2BK9JgEkchLEAAzM%3D%0A&s=127b40cc34dbb205b5277e6081b082f26e84fc417d35310f3aeee04998a679a8 > > It's over 6000 lines, and would most likely not be allowed on the list. > > The blocking happons on a server with local kvm-clients reading and > writing to a local btrfs-volume over nfs. > The btrfs-volume is on top of dm-crypt devices. > > Any additional info I can give to help? > Tests you want me to run? Very strange, since I don't actually see what we're waiting for. Can you please either send me your btrfs.ko or use gdb to see where this statement is: btrfs_commit_transaction+0x315 The syntax is gdb btrfs.ko gdb> list *btrfs_commit_transaction+0x315 -chris