From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-f52.google.com ([74.125.83.52]:33172 "EHLO mail-pg0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750995AbdBXSny (ORCPT ); Fri, 24 Feb 2017 13:43:54 -0500 Received: by mail-pg0-f52.google.com with SMTP id z128so14557010pgb.0 for ; Fri, 24 Feb 2017 10:43:54 -0800 (PST) Date: Fri, 24 Feb 2017 10:35:58 -0800 From: Omar Sandoval To: "Austin S. Hemmelgarn" Cc: Christian Theune , linux-btrfs@vger.kernel.org Subject: Re: Downgrading kernel 4.9 to 4.4 with space_cache=v2 enabled? Message-ID: <20170224183558.GB27484@vader.DHCP.thefacebook.com> References: <029c96aa-9c1e-f12c-8b63-4e4485428c67@gmail.com> <71958378-5AB4-4E66-8F54-60215141D1BB@flyingcircus.io> <3DCDD3DC-4201-4529-AACA-07A431AB4D6C@flyingcircus.io> <21390090-717d-2dff-35ec-86bcbab342ae@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 In-Reply-To: <21390090-717d-2dff-35ec-86bcbab342ae@gmail.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Thu, Feb 23, 2017 at 08:38:02AM -0500, Austin S. Hemmelgarn wrote: > On 2017-02-23 08:19, Christian Theune wrote: > > Hi, > > > > just for future reference if someone finds this thread: there is a bit of output I’m seeing with this crashing kernel (unclear whether related to btrfs or not): > > > > 31 | 02/23/2017 | 09:51:22 | OS Stop/Shutdown #0x4f | Run-time critical stop | Asserted > > 32 | Linux kernel panic: Out of memo > > 33 | Linux kernel panic: ry and no k > > 34 | Linux kernel panic: illable pro > > 35 | Linux kernel panic: cesses... > > > OK, an OOM condition is (probably) not BTRFS related FWIW. IIRC, there were > a couple of issues with the OOM killer in 4.9, but I don't remember > specifics. To be able to determine anything useful though, you'd need a lot > more context in the kernel logs than just that. Yeah, if there is a problem with the free space tree, I'd be happy to take a look, but it's impossible to tell from this.