linux-kernel - Re: [4.1-rc7] btrfs related VM_BUG

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Date:	Wed, 10 Jun 2015 13:43:31 -0400
From:	Chris Mason <clm@...com>
To:	Dave Jones <davej@...emonkey.org.uk>, <jbacik@...com>,
	<dsterba@...e.cz>, Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [4.1-rc7] btrfs related VM_BUG_ON in filemap.c

On 06/10/2015 09:40 AM, Dave Jones wrote:
> Found this on serial console this morning. The machine had rebooted itself shortly
> afterwards (surprising, given I don't have panic-on-oops or similar set).
> 

We had one other report of this a few months ago.  Josef and I read
through all of this and decided it was impossible, so someone else must
be holding on to that page and unlocking it.

(that someone else could easily be btrfs, just not in this code path)

so...what horrible things have you been up to?

-chris

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