From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f71.google.com (mail-wm0-f71.google.com [74.125.82.71]) by kanga.kvack.org (Postfix) with ESMTP id 2EACE6B0038 for ; Tue, 4 Oct 2016 13:46:49 -0400 (EDT) Received: by mail-wm0-f71.google.com with SMTP id f193so99417727wmg.0 for ; Tue, 04 Oct 2016 10:46:49 -0700 (PDT) Received: from arcturus.aphlor.org (arcturus.ipv6.aphlor.org. [2a03:9800:10:4a::2]) by mx.google.com with ESMTPS id g136si6555017wme.25.2016.10.04.10.46.47 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 04 Oct 2016 10:46:48 -0700 (PDT) Date: Tue, 4 Oct 2016 13:46:45 -0400 From: Dave Jones Subject: Re: page_cache_tree_insert WARN_ON hit on 4.8+ Message-ID: <20161004174645.urwwmvgibabaokjn@codemonkey.org.uk> References: <20161004170955.n25polpcsotmwcdq@codemonkey.org.uk> <20161004173425.GA1223@cmpxchg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20161004173425.GA1223@cmpxchg.org> Sender: owner-linux-mm@kvack.org List-ID: To: Johannes Weiner Cc: Linux Kernel , linux-mm@kvack.org On Tue, Oct 04, 2016 at 07:34:25PM +0200, Johannes Weiner wrote: > Hi Dave, > > On Tue, Oct 04, 2016 at 01:09:55PM -0400, Dave Jones wrote: > > Hit this during a trinity run. > > Kernel built from v4.8-1558-g21f54ddae449 > > > > WARNING: CPU: 0 PID: 5670 at ./include/linux/swap.h:276 page_cache_tree_insert+0x198/0x1b0 > > Thanks for the report. > > I've been trying to reproduce this too after Linus got hit by it. Is > there any way to trace back the steps what trinity was doing exactly? That run didn't have logging enabled, so not sure.. > What kind of file(system) this was operating on, btrfs > file size, what the /proc/vmstat delta before the operation until the trigger looks like? No idea. Let me play with some options, see if I can narrow it down. Dave -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org