From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:61200 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752108AbaBQNEU (ORCPT ); Mon, 17 Feb 2014 08:04:20 -0500 Message-ID: <5302096A.8070708@fb.com> Date: Mon, 17 Feb 2014 08:06:50 -0500 From: Chris Mason MIME-Version: 1.0 To: Martin Steigerwald , Dave CC: linux-btrfs Subject: Re: [3.14-rc1] BUG: soft lockup - CPU#1 stuck for 22s with 255 GiB BTRFS with only 6 GiB free References: <16006080.zeFsK4Kcpx@merkaba> <2243736.htmPCRf1EE@merkaba> In-Reply-To: <2243736.htmPCRf1EE@merkaba> Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 02/17/2014 05:35 AM, Martin Steigerwald wrote: > Am Dienstag, 11. Februar 2014, 15:50:12 schrieb Dave: >> On Tue, Feb 11, 2014 at 10:36 AM, Martin Steigerwald >> >> wrote: >>> Today I started getting those on 3.14-rc. One core as displayed as 100% >>> system CPU. I rebooted cause the system didnīt respond consistently to >>> user input anymore. >> >> Does 3.14-rc1 have Joseph's delayed refs throttling code? I had two >> separate machines that exhibited similar symptoms. Chris's for-linus >> branch has a fix for this which solved my problems: >> https://urldefense.proofpoint.com/v1/url?u=https://git.kernel.org/cgit/linux/kernel/git/mason/linux-btrfs.git/commit/?h%3Dfor-linus%26id%3D27a377db745ed4d11b3b9b340756857cb8dde07f&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=6%2FL0lzzDhu0Y1hL9xm%2BQyA%3D%3D%0A&m=EO6xV8TuAFpGsdd9TfvXbfHYgIFA8%2BKZo1KnQ%2BZ6yzU%3D%0A&s=c9c8769a12e5537247d6ef176681cf19e2bf80fef186ead748b8a2cd2bac6a85 > > I also got this now under 3.14-rc3 with almost 16 GiB left on heavy KMail / > Akonadi activity. 3.14-rc3 includes above commit. > > As I now also got it with more free space and never saw this with upto > 3.13 I think this is a regression. Do we eventually recover or is it stuck like this forever? -chris