Re: Lockups with btrfs on 3.16-rc1 - bisected

2014-06-18 Thread Waiman Long
el build on a btrfs filesystem for the package I work on. This was working fine just a few days before rc1. Bisecting brought me to the following commit: commit bd01ec1a13f9a327950c8e3080096446c7804753 Author: Waiman Long Date: Mon Feb 3 13:18:57 2014 +0100 x86, locking/rw

Re: Lockups with btrfs on 3.16-rc1 - bisected

2014-06-18 Thread Waiman Long
On 06/18/2014 06:27 PM, Josef Bacik wrote: On 06/18/2014 03:17 PM, Waiman Long wrote: On 06/18/2014 04:57 PM, Marc Dionne wrote: Hi, I've been seeing very reproducible soft lockups with 3.16-rc1 similar to what is reported here: https://urldefense.proofpoint.com/v1/url?u=http://marc.in

Re: Lockups with btrfs on 3.16-rc1 - bisected

2014-06-18 Thread Waiman Long
On 06/18/2014 07:10 PM, Josef Bacik wrote: On 06/18/2014 03:47 PM, Waiman Long wrote: On 06/18/2014 06:27 PM, Josef Bacik wrote: On 06/18/2014 03:17 PM, Waiman Long wrote: On 06/18/2014 04:57 PM, Marc Dionne wrote: Hi, I've been seeing very reproducible soft lockups with 3.1

Re: Lockups with btrfs on 3.16-rc1 - bisected

2014-06-18 Thread Waiman Long
On 06/18/2014 07:27 PM, Chris Mason wrote: On 06/18/2014 07:19 PM, Waiman Long wrote: On 06/18/2014 07:10 PM, Josef Bacik wrote: On 06/18/2014 03:47 PM, Waiman Long wrote: On 06/18/2014 06:27 PM, Josef Bacik wrote: On 06/18/2014 03:17 PM, Waiman Long wrote: On 06/18/2014 04:57 PM, Marc

Re: Lockups with btrfs on 3.16-rc1 - bisected

2014-06-18 Thread Waiman Long
On 06/18/2014 08:03 PM, Marc Dionne wrote: On Wed, Jun 18, 2014 at 7:53 PM, Chris Mason wrote: On 06/18/2014 07:30 PM, Waiman Long wrote: On 06/18/2014 07:27 PM, Chris Mason wrote: On 06/18/2014 07:19 PM, Waiman Long wrote: On 06/18/2014 07:10 PM, Josef Bacik wrote: On 06/18/2014 03:47 PM

Re: Lockups with btrfs on 3.16-rc1 - bisected

2014-06-18 Thread Waiman Long
On 06/18/2014 10:11 PM, Chris Mason wrote: On 06/18/2014 10:03 PM, Marc Dionne wrote: On Wed, Jun 18, 2014 at 8:41 PM, Marc Dionne wrote: On Wed, Jun 18, 2014 at 8:08 PM, Waiman Long wrote: On 06/18/2014 08:03 PM, Marc Dionne wrote: And for an additional data point, just removing those

Re: Lockups with btrfs on 3.16-rc1 - bisected

2014-06-19 Thread Waiman Long
On 06/19/2014 12:51 PM, Chris Mason wrote: On 06/18/2014 11:21 PM, Waiman Long wrote: On 06/18/2014 10:11 PM, Chris Mason wrote: On 06/18/2014 10:03 PM, Marc Dionne wrote: On Wed, Jun 18, 2014 at 8:41 PM, Marc Dionne wrote: On Wed, Jun 18, 2014 at 8:08 PM, Waiman Long wrote: On 06/18/2014

Re: Lockups with btrfs on 3.16-rc1 - bisected

2014-06-19 Thread Waiman Long
On 06/19/2014 05:50 PM, Chris Mason wrote: I would like to take back my comments. I took out the read_lock, but the process still hang while doing file activities on btrfs filesystem. So the problem is trickier than I thought. Below are the stack backtraces of some of the relevant processes. Y

Re: [x86, locking/rwlocks, btrfs] INFO: rcu_sched self-detected stall on CPU

2014-10-03 Thread Waiman Long
On 10/03/2014 09:33 AM, Fengguang Wu wrote: Hi Waiman, FYI, we noticed the below changes on commit bd01ec1a13f9a327950c8e3080096446c7804753 ("x86, locking/rwlocks: Enable qrwlocks on x86") +--+++ |

Re: [x86, locking/rwlocks, btrfs] INFO: rcu_sched self-detected stall on CPU

2014-10-07 Thread Waiman Long
On 10/04/2014 06:06 AM, Chuck Ebbert wrote: On Fri, 03 Oct 2014 23:27:58 -0400 Waiman Long wrote: On 10/03/2014 09:33 AM, Fengguang Wu wrote: Hi Waiman, FYI, we noticed the below changes on commit bd01ec1a13f9a327950c8e3080096446c7804753 ("x86, locking/rwlocks: Enable qrwlocks on