From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:6383 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759412AbaGXO7G (ORCPT ); Thu, 24 Jul 2014 10:59:06 -0400 Message-ID: <53D11F2B.1070008@fb.com> Date: Thu, 24 Jul 2014 10:58:51 -0400 From: Chris Mason MIME-Version: 1.0 To: Martin Steigerwald CC: , Cody P Schafer , Marc MERLIN Subject: Re: BTRFS hang with 3.16-rc5 (and also with 3.16-rc4) References: <1502954.OtX3SzjMKZ@merkaba> <53C52AE4.6010803@fb.com> <1984661.CMGGdWA6Ux@merkaba> <1809953.ithLVmijbn@merkaba> In-Reply-To: <1809953.ithLVmijbn@merkaba> Content-Type: text/plain; charset="UTF-8" Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 07/23/2014 06:47 PM, Martin Steigerwald wrote: > Am Dienstag, 15. Juli 2014, 17:08:27 schrieb Martin Steigerwald: >> Am Dienstag, 15. Juli 2014, 09:21:40 schrieb Chris Mason: >>> On 07/14/2014 05:58 PM, Martin Steigerwald wrote: >>>> Am Montag, 14. Juli 2014, 16:12:22 schrieb Chris Mason: >>>>> On 07/14/2014 11:10 AM, Martin Steigerwald wrote: >>>>>> Am Montag, 14. Juli 2014, 17:04:22 schrieben Sie: >>>>>>> Hi! >>>>>>> >>>>>>> While with 3.16-rc3 and rc4 I didn´t have a BTRFS hang in several >>>>>>> days >>>>>>> of >>>>>>> usage, with 3-16-rc5 I had a hang again. Less than a hour since >>>>>>> booting >>>>>>> it. >>>>>>> >>>>>>> Since the hang bug I and others had with 3.15 and upto 3.16-rc2 >>>>>>> usually >>>>>>> didn´t happen that quickly after boot and since backtrace looks a bit >>>>>>> different from what I have in memory, I post this in a new thread. >>>>>>> See thread "Blocked tasks on 3.15.1" for a discussion of previous >>>>>>> hang >>>>>>> issues. >>>>>> >>>>>> Probably good to add some basic information on the filesystem: >>>>> Do you have compression enabled? I wasn't able to nail down the 3.15.1 >>>>> hang before vacation attacked me, but I'm hoping to track it down >>>>> today. >>>> >>>> Yes. I have. >>>> >>>> It just hung again while I was playing PlaneShift. >>>> >>>> Back to 3.16-rc4 as rc5 seems to be broke here. >>> >>> The btrfs hang you're hitting goes back to 3.15. So 3.16-rc4 vs rc5 >>> shouldn't be a factor. Are you hitting other problems with 3.16? >> >> So far for this day 3.16-rc4 behaves nicely. With 3.16-rc5 I had a BTRFS >> hang twice yesterday. 3.16-rc4 before also behaved nicely for several days >> or well about a week here. > > 3.16-rc4 now hung as well… Liu Bo has a promising patch: https://patchwork.kernel.org/patch/4618421/ Please give it a shot. There's a second deadlock reading the free space cache, I'm still working on that one too. -chris