linux-kernel - Re: master - btrfs lockdep splat

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Date:   Thu, 12 Jan 2017 20:37:19 +0100
From:   Mike Galbraith <umgwanakikbuti@...il.com>
To:     bo.li.liu@...cle.com
Cc:     LKML <linux-kernel@...r.kernel.org>, linux-btrfs@...r.kernel.org
Subject: Re: master - btrfs lockdep splat

On Thu, 2017-01-12 at 10:44 -0800, Liu Bo wrote:
> On Thu, Jan 12, 2017 at 07:12:12PM +0100, Mike Galbraith wrote:
> > Greetings,
> > 
> > I wanted to do some -rt testing, but seems non-rt kernels aren't
> > lockdep clean with btrfs /, making -rt testing a bit premature.
> > 
> > (hm, 28a235931 Btrfs: fix lockdep warning on deadlock against an inode's log mutex)
> 
> It's rather a false-positive lockdep warning than a real deadlock, and a
> patch[1] has been queued to fix it.

(yeah, just stops lockdep from perhaps finding something real)

> [1]: https://patchwork.kernel.org/patch/9473431/

Yup, virtual box seems to be a happy camper now.  Thanks.

	-Mike